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What this is

This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

/*
 * Copyright 2001-2004 The Apache Software Foundation
 *
 * Licensed 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 examples;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.apache.commons.net.WhoisClient;

/***
 * This is an example of how you would implement the Linux fwhois command
 * in Java using NetComponents.  The Java version is much shorter.
 * 

***/ public final class fwhois { public static final void main(String[] args) { int index; String handle, host; InetAddress address = null; WhoisClient whois; if (args.length != 1) { System.err.println("usage: fwhois handle[@]"); System.exit(1); } index = args[0].lastIndexOf("@"); whois = new WhoisClient(); // We want to timeout if a response takes longer than 60 seconds whois.setDefaultTimeout(60000); if (index == -1) { handle = args[0]; host = WhoisClient.DEFAULT_HOST; } else { handle = args[0].substring(0, index); host = args[0].substring(index + 1); } try { address = InetAddress.getByName(host); } catch (UnknownHostException e) { System.err.println("Error unknown host: " + e.getMessage()); System.exit(1); } System.out.println("[" + address.getHostName() + "]"); try { whois.connect(address); System.out.print(whois.query(handle)); whois.disconnect(); } catch (IOException e) { System.err.println("Error I/O exception: " + e.getMessage()); System.exit(1); } } }

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