src/java.base/share/classes/java/nio/channels/FileLock.java

rev 11318 : 6880737: (fs) FileLock constructors don't throw NPE if the channel argument is null
Summary: Throw IllegalArgumentException if the channel parameter is null
Reviewed-by: TBD

*** 24,33 ****
--- 24,34 ----
   */
  
  package java.nio.channels;
  
  import java.io.IOException;
+ import java.util.Objects;
  
  /**
   * A token representing a lock on a region of a file.
   *
   * <p> A file-lock object is created each time a lock is acquired on a file via
*** 145,154 ****
--- 146,156 ----
       *         If the preconditions on the parameters do not hold
       */
      protected FileLock(FileChannel channel,
                         long position, long size, boolean shared)
      {
+         Objects.requireNonNull(channel, "Null channel");
          if (position < 0)
              throw new IllegalArgumentException("Negative position");
          if (size < 0)
              throw new IllegalArgumentException("Negative size");
          if (position + size < 0)
*** 183,192 ****
--- 185,195 ----
       * @since 1.7
       */
      protected FileLock(AsynchronousFileChannel channel,
                         long position, long size, boolean shared)
      {
+         Objects.requireNonNull(channel, "Null channel");
          if (position < 0)
              throw new IllegalArgumentException("Negative position");
          if (size < 0)
              throw new IllegalArgumentException("Negative size");
          if (position + size < 0)