Java JVM isJdk()

Description

Tests if the running platform is a JDK.

License

Open Source License

Declaration

static boolean isJdk() 

Method Source Code

//package com.java2s;
/*//from   w w w.ja va 2s .c o  m
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import java.io.*;

public class Main {
    private static String jrepath = null;

    /**
     * Tests if the running platform is a JDK.
     */
    static boolean isJdk() {
        // <HOME>/jre exists which implies it's a JDK
        return getJrePath().endsWith(File.separator + "jre");
    }

    /**
     * Gets the pathname of JRE in the running platform
     * This can be a JDK or JRE.
     */
    static synchronized String getJrePath() {
        if (jrepath == null) {
            // Determine the JRE path by checking the existence of
            // <HOME>/jre/lib and <HOME>/lib.
            String javaHome = System.getProperty("java.home");
            jrepath = javaHome + File.separator + "jre";
            File f = new File(jrepath, "lib");
            if (!f.exists()) {
                // java.home usually points to the JRE path
                jrepath = javaHome;
            }
        }
        return jrepath;
    }
}

Related

1. getJVM()
2. getJVMClassPath(boolean includeBootClassPath)
3. getJvmDll(String javahome)
4. getJvmExecutablePath()
5. getJVMPath()