src/jdk.jdi/windows/classes/com/sun/tools/jdi/SunSDK.java

/*
 * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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 */

package com.sun.tools.jdi;

import java.io.File;

/**
 * This class encapsulates platform-specific details of the
 * structure of an SDK which has a JRE embedded in it.
 */
class SunSDK {
    /**
     * Returns the home directory of a Java 2 SDK if the current
     * JRE is embedded in one.
     */
    static String home() {
        File jreHome = new File(System.getProperty("java.home"));
        File jreParent = new File(jreHome.getParent());

        String jdwpLibName = "bin" + File.separator +
                             System.mapLibraryName("jdwp");
        File jdwpLib = new File(jreParent, jdwpLibName);
        return jdwpLib.exists() ? jreParent.getAbsolutePath() : null;
    }
}