/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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*/
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import java.io.*;
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/**
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* This program provides a simple utility that determines the location of the
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* Java installation. The output will be in a form suitable for use in a
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* JAVA_HOME environment variable.
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*/
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public class FindJavaHome
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{
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public static void main(String[] args)
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throws Exception
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{
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String javaHome = System.getProperty("java.home");
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File javaHomeDir = new File(javaHome);
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if (! javaHomeDir.exists())
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{
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throw new Exception("System property java.home doesn't reference a " +
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"real directory");
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}
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String javacPath = File.separator + "bin" + File.separator + "javac";
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File javacFile = new File(javaHome + javacPath);
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if (! javacFile.exists())
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{
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javacFile = new File(javaHomeDir.getParent() + javacPath);
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if (javacFile.exists())
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{
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javaHomeDir = new File(javaHomeDir.getParent());
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}
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else
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{
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throw new Exception("Unable to determine Java compiler location " +
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"from java.home property value " + javaHome);
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}
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}
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System.out.println(javaHomeDir.getAbsolutePath());
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}
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}
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