1 /*
2 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.io;
27
28 import java.util.*;
29 import java.nio.charset.Charset;
30 import jdk.internal.misc.JavaIOAccess;
31 import jdk.internal.misc.SharedSecrets;
32 import sun.nio.cs.StreamDecoder;
33 import sun.nio.cs.StreamEncoder;
34
35 /**
36 * Methods to access the character-based console device, if any, associated
37 * with the current Java virtual machine.
38 *
39 * <p> Whether a virtual machine has a console is dependent upon the
40 * underlying platform and also upon the manner in which the virtual
41 * machine is invoked. If the virtual machine is started from an
42 * interactive command line without redirecting the standard input and
43 * output streams then its console will exist and will typically be
44 * connected to the keyboard and display from which the virtual machine
45 * was launched. If the virtual machine is started automatically, for
46 * example by a background job scheduler, then it will typically not
47 * have a console.
48 * <p>
49 * If this virtual machine has a console then it is represented by a
50 * unique instance of this class which can be obtained by invoking the
51 * {@link java.lang.System#console()} method. If no console device is
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1 /*
2 * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.io;
27
28 import java.util.*;
29 import java.nio.charset.Charset;
30 import jdk.internal.access.JavaIOAccess;
31 import jdk.internal.access.SharedSecrets;
32 import sun.nio.cs.StreamDecoder;
33 import sun.nio.cs.StreamEncoder;
34
35 /**
36 * Methods to access the character-based console device, if any, associated
37 * with the current Java virtual machine.
38 *
39 * <p> Whether a virtual machine has a console is dependent upon the
40 * underlying platform and also upon the manner in which the virtual
41 * machine is invoked. If the virtual machine is started from an
42 * interactive command line without redirecting the standard input and
43 * output streams then its console will exist and will typically be
44 * connected to the keyboard and display from which the virtual machine
45 * was launched. If the virtual machine is started automatically, for
46 * example by a background job scheduler, then it will typically not
47 * have a console.
48 * <p>
49 * If this virtual machine has a console then it is represented by a
50 * unique instance of this class which can be obtained by invoking the
51 * {@link java.lang.System#console()} method. If no console device is
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