Java Is Readable File isReachable(String internetProtocolAddress)

Description

is Reachable

License

Open Source License

Declaration

public static boolean isReachable(String internetProtocolAddress)
            throws IOException 

Method Source Code

//package com.java2s;
/*//from w ww.  ja v  a2s  .c  o m
 * JBoss, Home of Professional Open Source.
 * See the COPYRIGHT.txt file distributed with this work for information
 * regarding copyright ownership.  Some portions may be licensed
 * to Red Hat, Inc. under one or more contributor license agreements.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static boolean isReachable(String internetProtocolAddress)
            throws IOException {
        List<String> command = new ArrayList<String>();
        command.add("ping");

        if (System.getProperty("os.name").startsWith("Windows"))

        {
            command.add("-n");
        } else {
            command.add("-c");
        }

        command.add("1");
        command.add(internetProtocolAddress);

        ProcessBuilder processBuilder = new ProcessBuilder(command);
        Process process = processBuilder.start();

        BufferedReader standardOutput = new BufferedReader(
                new InputStreamReader(process.getInputStream()));

        String outputLine;

        while ((outputLine = standardOutput.readLine()) != null) {
            // Picks up Windows and Unix unreachable hosts
            if (outputLine.toLowerCase().contains(
                    "destination host unreachable")) {
                return false;
            }
        }

        return true;
    }
}

Related

1. isReadable(File arcFile)
2. isReadable(String filename)
3. isReadableFile(File f)
4. isReadableFile(File file)