Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.net.examples.util; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.apache.commons.net.io.Util; /*** * This is a utility class providing a reader/writer capability required * by the weatherTelnet, rexec, rshell, and rlogin example programs. * The only point of the class is to hold the static method readWrite * which spawns a reader thread and a writer thread. The reader thread * reads from a local input source (presumably stdin) and writes the * data to a remote output destination. The writer thread reads from * a remote input source and writes to a local output destination. * The threads terminate when the remote input source closes. ***/ public final class IOUtil { public static final void readWrite(final InputStream remoteInput, final OutputStream remoteOutput, final InputStream localInput, final OutputStream localOutput) { Thread reader, writer; reader = new Thread() { @Override public void run() { int ch; try { while (!interrupted() && (ch = localInput.read()) != -1) { remoteOutput.write(ch); remoteOutput.flush(); } } catch (IOException e) { //e.printStackTrace(); } } }; writer = new Thread() { @Override public void run() { try { Util.copyStream(remoteInput, localOutput); } catch (IOException e) { e.printStackTrace(); System.exit(1); } } }; writer.setPriority(Thread.currentThread().getPriority() + 1); writer.start(); reader.setDaemon(true); reader.start(); try { writer.join(); reader.interrupt(); } catch (InterruptedException e) { // Ignored } } }