src/share/classes/java/io/RandomAccessFile.java
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*** 1,7 ****
/*
! * Copyright (c) 1994, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
--- 1,7 ----
/*
! * Copyright (c) 1994, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
*** 39,58 ****
* created in read/write mode, then output operations are also available;
* output operations write bytes starting at the file pointer and advance
* the file pointer past the bytes written. Output operations that write
* past the current end of the implied array cause the array to be
* extended. The file pointer can be read by the
! * <code>getFilePointer</code> method and set by the <code>seek</code>
* method.
* <p>
* It is generally true of all the reading routines in this class that
* if end-of-file is reached before the desired number of bytes has been
! * read, an <code>EOFException</code> (which is a kind of
! * <code>IOException</code>) is thrown. If any byte cannot be read for
! * any reason other than end-of-file, an <code>IOException</code> other
! * than <code>EOFException</code> is thrown. In particular, an
! * <code>IOException</code> may be thrown if the stream has been closed.
*
* @author unascribed
* @since JDK1.0
*/
--- 39,58 ----
* created in read/write mode, then output operations are also available;
* output operations write bytes starting at the file pointer and advance
* the file pointer past the bytes written. Output operations that write
* past the current end of the implied array cause the array to be
* extended. The file pointer can be read by the
! * {@code getFilePointer} method and set by the {@code seek}
* method.
* <p>
* It is generally true of all the reading routines in this class that
* if end-of-file is reached before the desired number of bytes has been
! * read, an {@code EOFException} (which is a kind of
! * {@code IOException}) is thrown. If any byte cannot be read for
! * any reason other than end-of-file, an {@code IOException} other
! * than {@code EOFException} is thrown. In particular, an
! * {@code IOException} may be thrown if the stream has been closed.
*
* @author unascribed
* @since JDK1.0
*/
*** 80,95 ****
* file is to be opened. The permitted values and their meanings are as
* specified for the <a
* href="#mode"><tt>RandomAccessFile(File,String)</tt></a> constructor.
*
* <p>
! * If there is a security manager, its <code>checkRead</code> method
! * is called with the <code>name</code> argument
* as its argument to see if read access to the file is allowed.
* If the mode allows writing, the security manager's
! * <code>checkWrite</code> method
! * is also called with the <code>name</code> argument
* as its argument to see if write access to the file is allowed.
*
* @param name the system-dependent filename
* @param mode the access <a href="#mode">mode</a>
* @exception IllegalArgumentException if the mode argument is not equal
--- 80,95 ----
* file is to be opened. The permitted values and their meanings are as
* specified for the <a
* href="#mode"><tt>RandomAccessFile(File,String)</tt></a> constructor.
*
* <p>
! * If there is a security manager, its {@code checkRead} method
! * is called with the {@code name} argument
* as its argument to see if read access to the file is allowed.
* If the mode allows writing, the security manager's
! * {@code checkWrite} method
! * is also called with the {@code name} argument
* as its argument to see if write access to the file is allowed.
*
* @param name the system-dependent filename
* @param mode the access <a href="#mode">mode</a>
* @exception IllegalArgumentException if the mode argument is not equal
*** 101,113 ****
* <tt>"rw"</tt> but the given string does not denote an
* existing, writable regular file and a new regular file of
* that name cannot be created, or if some other error occurs
* while opening or creating the file
* @exception SecurityException if a security manager exists and its
! * <code>checkRead</code> method denies read access to the file
* or the mode is "rw" and the security manager's
! * <code>checkWrite</code> method denies write access to the file
* @see java.lang.SecurityException
* @see java.lang.SecurityManager#checkRead(java.lang.String)
* @see java.lang.SecurityManager#checkWrite(java.lang.String)
* @revised 1.4
* @spec JSR-51
--- 101,113 ----
* <tt>"rw"</tt> but the given string does not denote an
* existing, writable regular file and a new regular file of
* that name cannot be created, or if some other error occurs
* while opening or creating the file
* @exception SecurityException if a security manager exists and its
! * {@code checkRead} method denies read access to the file
* or the mode is "rw" and the security manager's
! * {@code checkWrite} method denies write access to the file
* @see java.lang.SecurityException
* @see java.lang.SecurityManager#checkRead(java.lang.String)
* @see java.lang.SecurityManager#checkWrite(java.lang.String)
* @revised 1.4
* @spec JSR-51
*** 162,175 ****
* operations performed. Using <tt>"rwd"</tt> only requires updates to the
* file's content to be written to storage; using <tt>"rws"</tt> requires
* updates to both the file's content and its metadata to be written, which
* generally requires at least one more low-level I/O operation.
*
! * <p> If there is a security manager, its <code>checkRead</code> method is
! * called with the pathname of the <code>file</code> argument as its
* argument to see if read access to the file is allowed. If the mode
! * allows writing, the security manager's <code>checkWrite</code> method is
* also called with the path argument to see if write access to the file is
* allowed.
*
* @param file the file object
* @param mode the access mode, as described
--- 162,175 ----
* operations performed. Using <tt>"rwd"</tt> only requires updates to the
* file's content to be written to storage; using <tt>"rws"</tt> requires
* updates to both the file's content and its metadata to be written, which
* generally requires at least one more low-level I/O operation.
*
! * <p> If there is a security manager, its {@code checkRead} method is
! * called with the pathname of the {@code file} argument as its
* argument to see if read access to the file is allowed. If the mode
! * allows writing, the security manager's {@code checkWrite} method is
* also called with the path argument to see if write access to the file is
* allowed.
*
* @param file the file object
* @param mode the access mode, as described
*** 183,195 ****
* with <tt>"rw"</tt> but the given file object does not denote
* an existing, writable regular file and a new regular file of
* that name cannot be created, or if some other error occurs
* while opening or creating the file
* @exception SecurityException if a security manager exists and its
! * <code>checkRead</code> method denies read access to the file
* or the mode is "rw" and the security manager's
! * <code>checkWrite</code> method denies write access to the file
* @see java.lang.SecurityManager#checkRead(java.lang.String)
* @see java.lang.SecurityManager#checkWrite(java.lang.String)
* @see java.nio.channels.FileChannel#force(boolean)
* @revised 1.4
* @spec JSR-51
--- 183,195 ----
* with <tt>"rw"</tt> but the given file object does not denote
* an existing, writable regular file and a new regular file of
* that name cannot be created, or if some other error occurs
* while opening or creating the file
* @exception SecurityException if a security manager exists and its
! * {@code checkRead} method denies read access to the file
* or the mode is "rw" and the security manager's
! * {@code checkWrite} method denies write access to the file
* @see java.lang.SecurityManager#checkRead(java.lang.String)
* @see java.lang.SecurityManager#checkWrite(java.lang.String)
* @see java.nio.channels.FileChannel#force(boolean)
* @revised 1.4
* @spec JSR-51
*** 251,261 ****
/**
* Returns the unique {@link java.nio.channels.FileChannel FileChannel}
* object associated with this file.
*
* <p> The {@link java.nio.channels.FileChannel#position()
! * </code>position<code>} of the returned channel will always be equal to
* this object's file-pointer offset as returned by the {@link
* #getFilePointer getFilePointer} method. Changing this object's
* file-pointer offset, whether explicitly or by reading or writing bytes,
* will change the position of the channel, and vice versa. Changing the
* file's length via this object will change the length seen via the file
--- 251,261 ----
/**
* Returns the unique {@link java.nio.channels.FileChannel FileChannel}
* object associated with this file.
*
* <p> The {@link java.nio.channels.FileChannel#position()
! * position} of the returned channel will always be equal to
* this object's file-pointer offset as returned by the {@link
* #getFilePointer getFilePointer} method. Changing this object's
* file-pointer offset, whether explicitly or by reading or writing bytes,
* will change the position of the channel, and vice versa. Changing the
* file's length via this object will change the length seen via the file
*** 275,287 ****
}
}
/**
* Opens a file and returns the file descriptor. The file is
! * opened in read-write mode if the O_RDWR bit in <code>mode</code>
* is true, else the file is opened as read-only.
! * If the <code>name</code> refers to a directory, an IOException
* is thrown.
*
* @param name the name of the file
* @param mode the mode flags, a combination of the O_ constants
* defined above
--- 275,287 ----
}
}
/**
* Opens a file and returns the file descriptor. The file is
! * opened in read-write mode if the O_RDWR bit in {@code mode}
* is true, else the file is opened as read-only.
! * If the {@code name} refers to a directory, an IOException
* is thrown.
*
* @param name the name of the file
* @param mode the mode flags, a combination of the O_ constants
* defined above
*** 291,309 ****
// 'Read' primitives
/**
* Reads a byte of data from this file. The byte is returned as an
! * integer in the range 0 to 255 (<code>0x00-0x0ff</code>). This
* method blocks if no input is yet available.
* <p>
! * Although <code>RandomAccessFile</code> is not a subclass of
! * <code>InputStream</code>, this method behaves in exactly the same
* way as the {@link InputStream#read()} method of
! * <code>InputStream</code>.
*
! * @return the next byte of data, or <code>-1</code> if the end of the
* file has been reached.
* @exception IOException if an I/O error occurs. Not thrown if
* end-of-file has been reached.
*/
public native int read() throws IOException;
--- 291,309 ----
// 'Read' primitives
/**
* Reads a byte of data from this file. The byte is returned as an
! * integer in the range 0 to 255 ({@code 0x00-0x0ff}). This
* method blocks if no input is yet available.
* <p>
! * Although {@code RandomAccessFile} is not a subclass of
! * {@code InputStream}, this method behaves in exactly the same
* way as the {@link InputStream#read()} method of
! * {@code InputStream}.
*
! * @return the next byte of data, or {@code -1} if the end of the
* file has been reached.
* @exception IOException if an I/O error occurs. Not thrown if
* end-of-file has been reached.
*/
public native int read() throws IOException;
*** 316,378 ****
* @exception IOException If an I/O error has occurred.
*/
private native int readBytes(byte b[], int off, int len) throws IOException;
/**
! * Reads up to <code>len</code> bytes of data from this file into an
* array of bytes. This method blocks until at least one byte of input
* is available.
* <p>
! * Although <code>RandomAccessFile</code> is not a subclass of
! * <code>InputStream</code>, this method behaves in exactly the
* same way as the {@link InputStream#read(byte[], int, int)} method of
! * <code>InputStream</code>.
*
* @param b the buffer into which the data is read.
! * @param off the start offset in array <code>b</code>
* at which the data is written.
* @param len the maximum number of bytes read.
* @return the total number of bytes read into the buffer, or
! * <code>-1</code> if there is no more data because the end of
* the file has been reached.
* @exception IOException If the first byte cannot be read for any reason
* other than end of file, or if the random access file has been closed, or if
* some other I/O error occurs.
! * @exception NullPointerException If <code>b</code> is <code>null</code>.
! * @exception IndexOutOfBoundsException If <code>off</code> is negative,
! * <code>len</code> is negative, or <code>len</code> is greater than
! * <code>b.length - off</code>
*/
public int read(byte b[], int off, int len) throws IOException {
return readBytes(b, off, len);
}
/**
! * Reads up to <code>b.length</code> bytes of data from this file
* into an array of bytes. This method blocks until at least one byte
* of input is available.
* <p>
! * Although <code>RandomAccessFile</code> is not a subclass of
! * <code>InputStream</code>, this method behaves in exactly the
* same way as the {@link InputStream#read(byte[])} method of
! * <code>InputStream</code>.
*
* @param b the buffer into which the data is read.
* @return the total number of bytes read into the buffer, or
! * <code>-1</code> if there is no more data because the end of
* this file has been reached.
* @exception IOException If the first byte cannot be read for any reason
* other than end of file, or if the random access file has been closed, or if
* some other I/O error occurs.
! * @exception NullPointerException If <code>b</code> is <code>null</code>.
*/
public int read(byte b[]) throws IOException {
return readBytes(b, 0, b.length);
}
/**
! * Reads <code>b.length</code> bytes from this file into the byte
* array, starting at the current file pointer. This method reads
* repeatedly from the file until the requested number of bytes are
* read. This method blocks until the requested number of bytes are
* read, the end of the stream is detected, or an exception is thrown.
*
--- 316,378 ----
* @exception IOException If an I/O error has occurred.
*/
private native int readBytes(byte b[], int off, int len) throws IOException;
/**
! * Reads up to {@code len} bytes of data from this file into an
* array of bytes. This method blocks until at least one byte of input
* is available.
* <p>
! * Although {@code RandomAccessFile} is not a subclass of
! * {@code InputStream}, this method behaves in exactly the
* same way as the {@link InputStream#read(byte[], int, int)} method of
! * {@code InputStream}.
*
* @param b the buffer into which the data is read.
! * @param off the start offset in array {@code b}
* at which the data is written.
* @param len the maximum number of bytes read.
* @return the total number of bytes read into the buffer, or
! * {@code -1} if there is no more data because the end of
* the file has been reached.
* @exception IOException If the first byte cannot be read for any reason
* other than end of file, or if the random access file has been closed, or if
* some other I/O error occurs.
! * @exception NullPointerException If {@code b} is {@code null}.
! * @exception IndexOutOfBoundsException If {@code off} is negative,
! * {@code len} is negative, or {@code len} is greater than
! * {@code b.length - off}
*/
public int read(byte b[], int off, int len) throws IOException {
return readBytes(b, off, len);
}
/**
! * Reads up to {@code b.length} bytes of data from this file
* into an array of bytes. This method blocks until at least one byte
* of input is available.
* <p>
! * Although {@code RandomAccessFile} is not a subclass of
! * {@code InputStream}, this method behaves in exactly the
* same way as the {@link InputStream#read(byte[])} method of
! * {@code InputStream}.
*
* @param b the buffer into which the data is read.
* @return the total number of bytes read into the buffer, or
! * {@code -1} if there is no more data because the end of
* this file has been reached.
* @exception IOException If the first byte cannot be read for any reason
* other than end of file, or if the random access file has been closed, or if
* some other I/O error occurs.
! * @exception NullPointerException If {@code b} is {@code null}.
*/
public int read(byte b[]) throws IOException {
return readBytes(b, 0, b.length);
}
/**
! * Reads {@code b.length} bytes from this file into the byte
* array, starting at the current file pointer. This method reads
* repeatedly from the file until the requested number of bytes are
* read. This method blocks until the requested number of bytes are
* read, the end of the stream is detected, or an exception is thrown.
*
*** 384,394 ****
public final void readFully(byte b[]) throws IOException {
readFully(b, 0, b.length);
}
/**
! * Reads exactly <code>len</code> bytes from this file into the byte
* array, starting at the current file pointer. This method reads
* repeatedly from the file until the requested number of bytes are
* read. This method blocks until the requested number of bytes are
* read, the end of the stream is detected, or an exception is thrown.
*
--- 384,394 ----
public final void readFully(byte b[]) throws IOException {
readFully(b, 0, b.length);
}
/**
! * Reads exactly {@code len} bytes from this file into the byte
* array, starting at the current file pointer. This method reads
* repeatedly from the file until the requested number of bytes are
* read. This method blocks until the requested number of bytes are
* read, the end of the stream is detected, or an exception is thrown.
*
*** 408,426 ****
n += count;
} while (n < len);
}
/**
! * Attempts to skip over <code>n</code> bytes of input discarding the
* skipped bytes.
* <p>
*
* This method may skip over some smaller number of bytes, possibly zero.
* This may result from any of a number of conditions; reaching end of
! * file before <code>n</code> bytes have been skipped is only one
! * possibility. This method never throws an <code>EOFException</code>.
! * The actual number of bytes skipped is returned. If <code>n</code>
* is negative, no bytes are skipped.
*
* @param n the number of bytes to be skipped.
* @return the actual number of bytes skipped.
* @exception IOException if an I/O error occurs.
--- 408,426 ----
n += count;
} while (n < len);
}
/**
! * Attempts to skip over {@code n} bytes of input discarding the
* skipped bytes.
* <p>
*
* This method may skip over some smaller number of bytes, possibly zero.
* This may result from any of a number of conditions; reaching end of
! * file before {@code n} bytes have been skipped is only one
! * possibility. This method never throws an {@code EOFException}.
! * The actual number of bytes skipped is returned. If {@code n}
* is negative, no bytes are skipped.
*
* @param n the number of bytes to be skipped.
* @return the actual number of bytes skipped.
* @exception IOException if an I/O error occurs.
*** 449,459 ****
/**
* Writes the specified byte to this file. The write starts at
* the current file pointer.
*
! * @param b the <code>byte</code> to be written.
* @exception IOException if an I/O error occurs.
*/
public native void write(int b) throws IOException;
/**
--- 449,459 ----
/**
* Writes the specified byte to this file. The write starts at
* the current file pointer.
*
! * @param b the {@code byte} to be written.
* @exception IOException if an I/O error occurs.
*/
public native void write(int b) throws IOException;
/**
*** 465,487 ****
* @exception IOException If an I/O error has occurred.
*/
private native void writeBytes(byte b[], int off, int len) throws IOException;
/**
! * Writes <code>b.length</code> bytes from the specified byte array
* to this file, starting at the current file pointer.
*
* @param b the data.
* @exception IOException if an I/O error occurs.
*/
public void write(byte b[]) throws IOException {
writeBytes(b, 0, b.length);
}
/**
! * Writes <code>len</code> bytes from the specified byte array
! * starting at offset <code>off</code> to this file.
*
* @param b the data.
* @param off the start offset in the data.
* @param len the number of bytes to write.
* @exception IOException if an I/O error occurs.
--- 465,487 ----
* @exception IOException If an I/O error has occurred.
*/
private native void writeBytes(byte b[], int off, int len) throws IOException;
/**
! * Writes {@code b.length} bytes from the specified byte array
* to this file, starting at the current file pointer.
*
* @param b the data.
* @exception IOException if an I/O error occurs.
*/
public void write(byte b[]) throws IOException {
writeBytes(b, 0, b.length);
}
/**
! * Writes {@code len} bytes from the specified byte array
! * starting at offset {@code off} to this file.
*
* @param b the data.
* @param off the start offset in the data.
* @param len the number of bytes to write.
* @exception IOException if an I/O error occurs.
*** 510,521 ****
* of the file.
*
* @param pos the offset position, measured in bytes from the
* beginning of the file, at which to set the file
* pointer.
! * @exception IOException if <code>pos</code> is less than
! * <code>0</code> or if an I/O error occurs.
*/
public native void seek(long pos) throws IOException;
/**
* Returns the length of this file.
--- 510,521 ----
* of the file.
*
* @param pos the offset position, measured in bytes from the
* beginning of the file, at which to set the file
* pointer.
! * @exception IOException if {@code pos} is less than
! * {@code 0} or if an I/O error occurs.
*/
public native void seek(long pos) throws IOException;
/**
* Returns the length of this file.
*** 527,544 ****
/**
* Sets the length of this file.
*
* <p> If the present length of the file as returned by the
! * <code>length</code> method is greater than the <code>newLength</code>
* argument then the file will be truncated. In this case, if the file
! * offset as returned by the <code>getFilePointer</code> method is greater
! * than <code>newLength</code> then after this method returns the offset
! * will be equal to <code>newLength</code>.
*
* <p> If the present length of the file as returned by the
! * <code>length</code> method is smaller than the <code>newLength</code>
* argument then the file will be extended. In this case, the contents of
* the extended portion of the file are not defined.
*
* @param newLength The desired length of the file
* @exception IOException If an I/O error occurs
--- 527,544 ----
/**
* Sets the length of this file.
*
* <p> If the present length of the file as returned by the
! * {@code length} method is greater than the {@code newLength}
* argument then the file will be truncated. In this case, if the file
! * offset as returned by the {@code getFilePointer} method is greater
! * than {@code newLength} then after this method returns the offset
! * will be equal to {@code newLength}.
*
* <p> If the present length of the file as returned by the
! * {@code length} method is smaller than the {@code newLength}
* argument then the file will be extended. In this case, the contents of
* the extended portion of the file are not defined.
*
* @param newLength The desired length of the file
* @exception IOException If an I/O error occurs
*** 582,599 ****
// Some "reading/writing Java data types" methods stolen from
// DataInputStream and DataOutputStream.
//
/**
! * Reads a <code>boolean</code> from this file. This method reads a
* single byte from the file, starting at the current file pointer.
! * A value of <code>0</code> represents
! * <code>false</code>. Any other value represents <code>true</code>.
* This method blocks until the byte is read, the end of the stream
* is detected, or an exception is thrown.
*
! * @return the <code>boolean</code> value read.
* @exception EOFException if this file has reached the end.
* @exception IOException if an I/O error occurs.
*/
public final boolean readBoolean() throws IOException {
int ch = this.read();
--- 582,599 ----
// Some "reading/writing Java data types" methods stolen from
// DataInputStream and DataOutputStream.
//
/**
! * Reads a {@code boolean} from this file. This method reads a
* single byte from the file, starting at the current file pointer.
! * A value of {@code 0} represents
! * {@code false}. Any other value represents {@code true}.
* This method blocks until the byte is read, the end of the stream
* is detected, or an exception is thrown.
*
! * @return the {@code boolean} value read.
* @exception EOFException if this file has reached the end.
* @exception IOException if an I/O error occurs.
*/
public final boolean readBoolean() throws IOException {
int ch = this.read();
*** 603,624 ****
}
/**
* Reads a signed eight-bit value from this file. This method reads a
* byte from the file, starting from the current file pointer.
! * If the byte read is <code>b</code>, where
* <code>0 <= b <= 255</code>,
* then the result is:
* <blockquote><pre>
* (byte)(b)
* </pre></blockquote>
* <p>
* This method blocks until the byte is read, the end of the stream
* is detected, or an exception is thrown.
*
* @return the next byte of this file as a signed eight-bit
! * <code>byte</code>.
* @exception EOFException if this file has reached the end.
* @exception IOException if an I/O error occurs.
*/
public final byte readByte() throws IOException {
int ch = this.read();
--- 603,624 ----
}
/**
* Reads a signed eight-bit value from this file. This method reads a
* byte from the file, starting from the current file pointer.
! * If the byte read is {@code b}, where
* <code>0 <= b <= 255</code>,
* then the result is:
* <blockquote><pre>
* (byte)(b)
* </pre></blockquote>
* <p>
* This method blocks until the byte is read, the end of the stream
* is detected, or an exception is thrown.
*
* @return the next byte of this file as a signed eight-bit
! * {@code byte}.
* @exception EOFException if this file has reached the end.
* @exception IOException if an I/O error occurs.
*/
public final byte readByte() throws IOException {
int ch = this.read();
*** 649,660 ****
/**
* Reads a signed 16-bit number from this file. The method reads two
* bytes from this file, starting at the current file pointer.
* If the two bytes read, in order, are
! * <code>b1</code> and <code>b2</code>, where each of the two values is
! * between <code>0</code> and <code>255</code>, inclusive, then the
* result is equal to:
* <blockquote><pre>
* (short)((b1 << 8) | b2)
* </pre></blockquote>
* <p>
--- 649,660 ----
/**
* Reads a signed 16-bit number from this file. The method reads two
* bytes from this file, starting at the current file pointer.
* If the two bytes read, in order, are
! * {@code b1} and {@code b2}, where each of the two values is
! * between {@code 0} and {@code 255}, inclusive, then the
* result is equal to:
* <blockquote><pre>
* (short)((b1 << 8) | b2)
* </pre></blockquote>
* <p>
*** 677,687 ****
/**
* Reads an unsigned 16-bit number from this file. This method reads
* two bytes from the file, starting at the current file pointer.
* If the bytes read, in order, are
! * <code>b1</code> and <code>b2</code>, where
* <code>0 <= b1, b2 <= 255</code>,
* then the result is equal to:
* <blockquote><pre>
* (b1 << 8) | b2
* </pre></blockquote>
--- 677,687 ----
/**
* Reads an unsigned 16-bit number from this file. This method reads
* two bytes from the file, starting at the current file pointer.
* If the bytes read, in order, are
! * {@code b1} and {@code b2}, where
* <code>0 <= b1, b2 <= 255</code>,
* then the result is equal to:
* <blockquote><pre>
* (b1 << 8) | b2
* </pre></blockquote>
*** 705,726 ****
/**
* Reads a character from this file. This method reads two
* bytes from the file, starting at the current file pointer.
* If the bytes read, in order, are
! * <code>b1</code> and <code>b2</code>, where
* <code>0 <= b1, b2 <= 255</code>,
* then the result is equal to:
* <blockquote><pre>
* (char)((b1 << 8) | b2)
* </pre></blockquote>
* <p>
* This method blocks until the two bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next two bytes of this file, interpreted as a
! * <code>char</code>.
* @exception EOFException if this file reaches the end before reading
* two bytes.
* @exception IOException if an I/O error occurs.
*/
public final char readChar() throws IOException {
--- 705,726 ----
/**
* Reads a character from this file. This method reads two
* bytes from the file, starting at the current file pointer.
* If the bytes read, in order, are
! * {@code b1} and {@code b2}, where
* <code>0 <= b1, b2 <= 255</code>,
* then the result is equal to:
* <blockquote><pre>
* (char)((b1 << 8) | b2)
* </pre></blockquote>
* <p>
* This method blocks until the two bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next two bytes of this file, interpreted as a
! * {@code char}.
* @exception EOFException if this file reaches the end before reading
* two bytes.
* @exception IOException if an I/O error occurs.
*/
public final char readChar() throws IOException {
*** 732,754 ****
}
/**
* Reads a signed 32-bit integer from this file. This method reads 4
* bytes from the file, starting at the current file pointer.
! * If the bytes read, in order, are <code>b1</code>,
! * <code>b2</code>, <code>b3</code>, and <code>b4</code>, where
* <code>0 <= b1, b2, b3, b4 <= 255</code>,
* then the result is equal to:
* <blockquote><pre>
* (b1 << 24) | (b2 << 16) + (b3 << 8) + b4
* </pre></blockquote>
* <p>
* This method blocks until the four bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next four bytes of this file, interpreted as an
! * <code>int</code>.
* @exception EOFException if this file reaches the end before reading
* four bytes.
* @exception IOException if an I/O error occurs.
*/
public final int readInt() throws IOException {
--- 732,754 ----
}
/**
* Reads a signed 32-bit integer from this file. This method reads 4
* bytes from the file, starting at the current file pointer.
! * If the bytes read, in order, are {@code b1},
! * {@code b2}, {@code b3}, and {@code b4}, where
* <code>0 <= b1, b2, b3, b4 <= 255</code>,
* then the result is equal to:
* <blockquote><pre>
* (b1 << 24) | (b2 << 16) + (b3 << 8) + b4
* </pre></blockquote>
* <p>
* This method blocks until the four bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next four bytes of this file, interpreted as an
! * {@code int}.
* @exception EOFException if this file reaches the end before reading
* four bytes.
* @exception IOException if an I/O error occurs.
*/
public final int readInt() throws IOException {
*** 763,775 ****
/**
* Reads a signed 64-bit integer from this file. This method reads eight
* bytes from the file, starting at the current file pointer.
* If the bytes read, in order, are
! * <code>b1</code>, <code>b2</code>, <code>b3</code>,
! * <code>b4</code>, <code>b5</code>, <code>b6</code>,
! * <code>b7</code>, and <code>b8,</code> where:
* <blockquote><pre>
* 0 <= b1, b2, b3, b4, b5, b6, b7, b8 <=255,
* </pre></blockquote>
* <p>
* then the result is equal to:
--- 763,775 ----
/**
* Reads a signed 64-bit integer from this file. This method reads eight
* bytes from the file, starting at the current file pointer.
* If the bytes read, in order, are
! * {@code b1}, {@code b2}, {@code b3},
! * {@code b4}, {@code b5}, {@code b6},
! * {@code b7}, and {@code b8,} where:
* <blockquote><pre>
* 0 <= b1, b2, b3, b4, b5, b6, b7, b8 <=255,
* </pre></blockquote>
* <p>
* then the result is equal to:
*** 782,813 ****
* <p>
* This method blocks until the eight bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next eight bytes of this file, interpreted as a
! * <code>long</code>.
* @exception EOFException if this file reaches the end before reading
* eight bytes.
* @exception IOException if an I/O error occurs.
*/
public final long readLong() throws IOException {
return ((long)(readInt()) << 32) + (readInt() & 0xFFFFFFFFL);
}
/**
! * Reads a <code>float</code> from this file. This method reads an
! * <code>int</code> value, starting at the current file pointer,
! * as if by the <code>readInt</code> method
! * and then converts that <code>int</code> to a <code>float</code>
! * using the <code>intBitsToFloat</code> method in class
! * <code>Float</code>.
* <p>
* This method blocks until the four bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next four bytes of this file, interpreted as a
! * <code>float</code>.
* @exception EOFException if this file reaches the end before reading
* four bytes.
* @exception IOException if an I/O error occurs.
* @see java.io.RandomAccessFile#readInt()
* @see java.lang.Float#intBitsToFloat(int)
--- 782,813 ----
* <p>
* This method blocks until the eight bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next eight bytes of this file, interpreted as a
! * {@code long}.
* @exception EOFException if this file reaches the end before reading
* eight bytes.
* @exception IOException if an I/O error occurs.
*/
public final long readLong() throws IOException {
return ((long)(readInt()) << 32) + (readInt() & 0xFFFFFFFFL);
}
/**
! * Reads a {@code float} from this file. This method reads an
! * {@code int} value, starting at the current file pointer,
! * as if by the {@code readInt} method
! * and then converts that {@code int} to a {@code float}
! * using the {@code intBitsToFloat} method in class
! * {@code Float}.
* <p>
* This method blocks until the four bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next four bytes of this file, interpreted as a
! * {@code float}.
* @exception EOFException if this file reaches the end before reading
* four bytes.
* @exception IOException if an I/O error occurs.
* @see java.io.RandomAccessFile#readInt()
* @see java.lang.Float#intBitsToFloat(int)
*** 815,836 ****
public final float readFloat() throws IOException {
return Float.intBitsToFloat(readInt());
}
/**
! * Reads a <code>double</code> from this file. This method reads a
! * <code>long</code> value, starting at the current file pointer,
! * as if by the <code>readLong</code> method
! * and then converts that <code>long</code> to a <code>double</code>
! * using the <code>longBitsToDouble</code> method in
! * class <code>Double</code>.
* <p>
* This method blocks until the eight bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next eight bytes of this file, interpreted as a
! * <code>double</code>.
* @exception EOFException if this file reaches the end before reading
* eight bytes.
* @exception IOException if an I/O error occurs.
* @see java.io.RandomAccessFile#readLong()
* @see java.lang.Double#longBitsToDouble(long)
--- 815,836 ----
public final float readFloat() throws IOException {
return Float.intBitsToFloat(readInt());
}
/**
! * Reads a {@code double} from this file. This method reads a
! * {@code long} value, starting at the current file pointer,
! * as if by the {@code readLong} method
! * and then converts that {@code long} to a {@code double}
! * using the {@code longBitsToDouble} method in
! * class {@code Double}.
* <p>
* This method blocks until the eight bytes are read, the end of the
* stream is detected, or an exception is thrown.
*
* @return the next eight bytes of this file, interpreted as a
! * {@code double}.
* @exception EOFException if this file reaches the end before reading
* eight bytes.
* @exception IOException if an I/O error occurs.
* @see java.io.RandomAccessFile#readLong()
* @see java.lang.Double#longBitsToDouble(long)
*** 847,857 ****
* byte's value for the lower eight bits of the character and setting the
* high eight bits of the character to zero. This method does not,
* therefore, support the full Unicode character set.
*
* <p> A line of text is terminated by a carriage-return character
! * (<code>'\r'</code>), a newline character (<code>'\n'</code>), a
* carriage-return character immediately followed by a newline character,
* or the end of the file. Line-terminating characters are discarded and
* are not included as part of the string returned.
*
* <p> This method blocks until a newline character is read, a carriage
--- 847,857 ----
* byte's value for the lower eight bits of the character and setting the
* high eight bits of the character to zero. This method does not,
* therefore, support the full Unicode character set.
*
* <p> A line of text is terminated by a carriage-return character
! * ({@code '\u005Cr'}), a newline character ({@code '\u005Cn'}), a
* carriage-return character immediately followed by a newline character,
* or the end of the file. Line-terminating characters are discarded and
* are not included as part of the string returned.
*
* <p> This method blocks until a newline character is read, a carriage
*** 899,909 ****
* <a href="DataInput.html#modified-utf-8">modified UTF-8</a>
* format.
* <p>
* The first two bytes are read, starting from the current file
* pointer, as if by
! * <code>readUnsignedShort</code>. This value gives the number of
* following bytes that are in the encoded string, not
* the length of the resulting string. The following bytes are then
* interpreted as bytes encoding characters in the modified UTF-8 format
* and are converted into characters.
* <p>
--- 899,909 ----
* <a href="DataInput.html#modified-utf-8">modified UTF-8</a>
* format.
* <p>
* The first two bytes are read, starting from the current file
* pointer, as if by
! * {@code readUnsignedShort}. This value gives the number of
* following bytes that are in the encoded string, not
* the length of the resulting string. The following bytes are then
* interpreted as bytes encoding characters in the modified UTF-8 format
* and are converted into characters.
* <p>
*** 921,988 ****
public final String readUTF() throws IOException {
return DataInputStream.readUTF(this);
}
/**
! * Writes a <code>boolean</code> to the file as a one-byte value. The
! * value <code>true</code> is written out as the value
! * <code>(byte)1</code>; the value <code>false</code> is written out
! * as the value <code>(byte)0</code>. The write starts at
* the current position of the file pointer.
*
! * @param v a <code>boolean</code> value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeBoolean(boolean v) throws IOException {
write(v ? 1 : 0);
//written++;
}
/**
! * Writes a <code>byte</code> to the file as a one-byte value. The
* write starts at the current position of the file pointer.
*
! * @param v a <code>byte</code> value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeByte(int v) throws IOException {
write(v);
//written++;
}
/**
! * Writes a <code>short</code> to the file as two bytes, high byte first.
* The write starts at the current position of the file pointer.
*
! * @param v a <code>short</code> to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeShort(int v) throws IOException {
write((v >>> 8) & 0xFF);
write((v >>> 0) & 0xFF);
//written += 2;
}
/**
! * Writes a <code>char</code> to the file as a two-byte value, high
* byte first. The write starts at the current position of the
* file pointer.
*
! * @param v a <code>char</code> value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeChar(int v) throws IOException {
write((v >>> 8) & 0xFF);
write((v >>> 0) & 0xFF);
//written += 2;
}
/**
! * Writes an <code>int</code> to the file as four bytes, high byte first.
* The write starts at the current position of the file pointer.
*
! * @param v an <code>int</code> to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeInt(int v) throws IOException {
write((v >>> 24) & 0xFF);
write((v >>> 16) & 0xFF);
--- 921,988 ----
public final String readUTF() throws IOException {
return DataInputStream.readUTF(this);
}
/**
! * Writes a {@code boolean} to the file as a one-byte value. The
! * value {@code true} is written out as the value
! * {@code (byte)1}; the value {@code false} is written out
! * as the value {@code (byte)0}. The write starts at
* the current position of the file pointer.
*
! * @param v a {@code boolean} value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeBoolean(boolean v) throws IOException {
write(v ? 1 : 0);
//written++;
}
/**
! * Writes a {@code byte} to the file as a one-byte value. The
* write starts at the current position of the file pointer.
*
! * @param v a {@code byte} value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeByte(int v) throws IOException {
write(v);
//written++;
}
/**
! * Writes a {@code short} to the file as two bytes, high byte first.
* The write starts at the current position of the file pointer.
*
! * @param v a {@code short} to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeShort(int v) throws IOException {
write((v >>> 8) & 0xFF);
write((v >>> 0) & 0xFF);
//written += 2;
}
/**
! * Writes a {@code char} to the file as a two-byte value, high
* byte first. The write starts at the current position of the
* file pointer.
*
! * @param v a {@code char} value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeChar(int v) throws IOException {
write((v >>> 8) & 0xFF);
write((v >>> 0) & 0xFF);
//written += 2;
}
/**
! * Writes an {@code int} to the file as four bytes, high byte first.
* The write starts at the current position of the file pointer.
*
! * @param v an {@code int} to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeInt(int v) throws IOException {
write((v >>> 24) & 0xFF);
write((v >>> 16) & 0xFF);
*** 990,1003 ****
write((v >>> 0) & 0xFF);
//written += 4;
}
/**
! * Writes a <code>long</code> to the file as eight bytes, high byte first.
* The write starts at the current position of the file pointer.
*
! * @param v a <code>long</code> to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeLong(long v) throws IOException {
write((int)(v >>> 56) & 0xFF);
write((int)(v >>> 48) & 0xFF);
--- 990,1003 ----
write((v >>> 0) & 0xFF);
//written += 4;
}
/**
! * Writes a {@code long} to the file as eight bytes, high byte first.
* The write starts at the current position of the file pointer.
*
! * @param v a {@code long} to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeLong(long v) throws IOException {
write((int)(v >>> 56) & 0xFF);
write((int)(v >>> 48) & 0xFF);
*** 1009,1040 ****
write((int)(v >>> 0) & 0xFF);
//written += 8;
}
/**
! * Converts the float argument to an <code>int</code> using the
! * <code>floatToIntBits</code> method in class <code>Float</code>,
! * and then writes that <code>int</code> value to the file as a
* four-byte quantity, high byte first. The write starts at the
* current position of the file pointer.
*
! * @param v a <code>float</code> value to be written.
* @exception IOException if an I/O error occurs.
* @see java.lang.Float#floatToIntBits(float)
*/
public final void writeFloat(float v) throws IOException {
writeInt(Float.floatToIntBits(v));
}
/**
! * Converts the double argument to a <code>long</code> using the
! * <code>doubleToLongBits</code> method in class <code>Double</code>,
! * and then writes that <code>long</code> value to the file as an
* eight-byte quantity, high byte first. The write starts at the current
* position of the file pointer.
*
! * @param v a <code>double</code> value to be written.
* @exception IOException if an I/O error occurs.
* @see java.lang.Double#doubleToLongBits(double)
*/
public final void writeDouble(double v) throws IOException {
writeLong(Double.doubleToLongBits(v));
--- 1009,1040 ----
write((int)(v >>> 0) & 0xFF);
//written += 8;
}
/**
! * Converts the float argument to an {@code int} using the
! * {@code floatToIntBits} method in class {@code Float},
! * and then writes that {@code int} value to the file as a
* four-byte quantity, high byte first. The write starts at the
* current position of the file pointer.
*
! * @param v a {@code float} value to be written.
* @exception IOException if an I/O error occurs.
* @see java.lang.Float#floatToIntBits(float)
*/
public final void writeFloat(float v) throws IOException {
writeInt(Float.floatToIntBits(v));
}
/**
! * Converts the double argument to a {@code long} using the
! * {@code doubleToLongBits} method in class {@code Double},
! * and then writes that {@code long} value to the file as an
* eight-byte quantity, high byte first. The write starts at the current
* position of the file pointer.
*
! * @param v a {@code double} value to be written.
* @exception IOException if an I/O error occurs.
* @see java.lang.Double#doubleToLongBits(double)
*/
public final void writeDouble(double v) throws IOException {
writeLong(Double.doubleToLongBits(v));
*** 1058,1071 ****
}
/**
* Writes a string to the file as a sequence of characters. Each
* character is written to the data output stream as if by the
! * <code>writeChar</code> method. The write starts at the current
* position of the file pointer.
*
! * @param s a <code>String</code> value to be written.
* @exception IOException if an I/O error occurs.
* @see java.io.RandomAccessFile#writeChar(int)
*/
public final void writeChars(String s) throws IOException {
int clen = s.length();
--- 1058,1071 ----
}
/**
* Writes a string to the file as a sequence of characters. Each
* character is written to the data output stream as if by the
! * {@code writeChar} method. The write starts at the current
* position of the file pointer.
*
! * @param s a {@code String} value to be written.
* @exception IOException if an I/O error occurs.
* @see java.io.RandomAccessFile#writeChar(int)
*/
public final void writeChars(String s) throws IOException {
int clen = s.length();
*** 1085,1095 ****
* <a href="DataInput.html#modified-utf-8">modified UTF-8</a>
* encoding in a machine-independent manner.
* <p>
* First, two bytes are written to the file, starting at the
* current file pointer, as if by the
! * <code>writeShort</code> method giving the number of bytes to
* follow. This value is the number of bytes actually written out,
* not the length of the string. Following the length, each character
* of the string is output, in sequence, using the modified UTF-8 encoding
* for each character.
*
--- 1085,1095 ----
* <a href="DataInput.html#modified-utf-8">modified UTF-8</a>
* encoding in a machine-independent manner.
* <p>
* First, two bytes are written to the file, starting at the
* current file pointer, as if by the
! * {@code writeShort} method giving the number of bytes to
* follow. This value is the number of bytes actually written out,
* not the length of the string. Following the length, each character
* of the string is output, in sequence, using the modified UTF-8 encoding
* for each character.
*