MemoryTest.java

import junit.framework.TestCase;

public class MemoryTest extends TestCase {

    public void test() {
        Runtime runtime = Runtime.getRuntime();

        System.out.println("maxMemory = " + runtime.maxMemory());

        System.out.println("freeMemory = " + runtime.freeMemory());

        System.out.println("totalMemory = " + runtime.totalMemory());
    }
}