Re-merge with Classpath:

* java/util/Comparator (equals): Added.
	* java/io/PipedWriter.java (write): Changed argument to `int'.

	* java/io/FileDescriptor.java (FileDescriptor()): New
	constructor.
	* java/io/File.java (getAbsoluteFile): Doesn't throw IOException.

From-SVN: r45337

libjava/java/io/FileDescriptor.java

@@ -43,6 +43,11 @@ public final class FileDescriptor
   static final int SET = 0;
   static final int CUR = 1;
 
+  // This constructor is specified to create an invalid descriptor.
+  public FileDescriptor ()
+  {
+  }
+
   // Open a file.  MODE is a combination of the above mode flags.
   FileDescriptor (String path, int mode) throws FileNotFoundException
   {