jvm

package com.npnets.demo;

import java.io.IOException;

public class FreeMoney {
    public static void main(String[] args) throws IOException {
        //Process pro = Runtime.getRuntime().exec("");
        long jvm = Runtime.getRuntime().freeMemory();
        Runtime.getRuntime().gc();
        Runtime.getRuntime().maxMemory();
        System.out.println(jvm);
        System.out.println(Runtime.getRuntime().maxMemory());
    }
}