package java.io; public final class FileDescriptor{ public final static FileDescriptor in = null; public final static FileDescriptor out = null; public final static FileDescriptor err = null; public FileDescriptor() { throw new RuntimeException("skeleton method"); } public boolean valid() { throw new RuntimeException("skeleton method"); } public native void sync() throws SyncFailedException; synchronized void attach(Closeable c) { throw new RuntimeException("skeleton method"); } synchronized void closeAll(Closeable releaser) throws IOException { throw new RuntimeException("skeleton method"); } }