update java library path programmatically

test.sh

#!/bin/bash
# Inspired by : http://blog.cedarsoft.com/2010/11/setting-java-library-path-programmatically/

function testJavaVersion() {
    version=$1
    echo "java ${version}"
    docker run --rm -t -v "$(pwd):/opt" \
        java:${version} \
        /bin/bash -c "cd /opt && javac UpdateJavaLibPath.java && java UpdateJavaLibPath && rm UpdateJavaLibPath.class"
}

for version in 6 7 8
do
    testJavaVersion $version
done

UpdateJavaLibPath.java

import java.lang.ClassLoader;
import java.lang.String;
import java.lang.System;
import java.lang.reflect.Field;

class UpdateJavaLibPath {

    public static String printLibPath() {
        String current = System.getProperty("java.library.path");
                System.out.println(String.format("current = %s", current));
        return current;
    }

    public static void main(String[] args) {
        String current = printLibPath();
        System.setProperty( "java.library.path", current + ":/tmp" );

        try {
            Field fieldSysPath = ClassLoader.class.getDeclaredField("sys_paths");
            fieldSysPath.setAccessible( true );
            fieldSysPath.set( null, null );
            printLibPath();
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}