深入浅析JVM中的参数分配

package com.ietree.basicskill.jvm;public class Demo01 {  public static void main(String[] args) {        // -XX:+PrintGC -Xms5m -Xmx20m -XX:+UseSerialGC -XX:+PrintGCDetails -XX:+PrintCommandLineFlags        //查看GC信息    System.out.println("max memory:" + Runtime.getRuntime().maxMemory());    System.out.println("free memory:" + Runtime.getRuntime().freeMemory());    System.out.println("total memory:" + Runtime.getRuntime().totalMemory());        byte[] b1 = new byte[1*1024*1024];    System.out.println("分配了1M");    System.out.println("max memory:" + Runtime.getRuntime().maxMemory());    System.out.println("free memory:" + Runtime.getRuntime().freeMemory());    System.out.println("total memory:" + Runtime.getRuntime().totalMemory());        byte[] b2 = new byte[4*1024*1024];    System.out.println("分配了4M");    System.out.println("max memory:" + Runtime.getRuntime().maxMemory());    System.out.println("free memory:" + Runtime.getRuntime().freeMemory());    System.out.println("total memory:" + Runtime.getRuntime().totalMemory());      }}