java lang包Runtime类

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package core.java.lang;

import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;

/**

• @author DGW

• @date 2017 2017年4月13日 下午8:51:19

• @filename RuntimeClass.java
  /
  public class RuntimeClass {
  /*

  • @param args
  • 实际可以使用
    */
    public static void main(String[] args) {
    OperatingSystemMXBean opera = ManagementFactory.getOperatingSystemMXBean();
    System.out.println(opera.getAvailableProcessors());
    System.out.println(opera.getArch());
    System.out.println(opera.getSystemLoadAverage());
    Runtime runtime = Runtime.getRuntime();
    //空闲内存
    System.out.println(runtime.freeMemory());
    //总内存
    System.out.println(runtime.totalMemory());
    //最大内存
    System.out.println(runtime.maxMemory());
    //cpu核心数
    System.out.println(Runtime.getRuntime().availableProcessors());

  }

}

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