侧量代码的执行时间 java

首先，定义Timable接口，接口中定义run()方法:

package com.lulu.basic;public interface Timable {void run();}

然后，写测量的时间的类：Timing

package com.lulu.basic;import java.util.Calendar;public class Timing {public static void timing(Timable object){long start = getCurrentMillionSecond();object.run();long end = getCurrentMillionSecond();double timePassed = (end-start)/1000;System.out.println("执行用时共计" + timePassed +"秒！");}private static long getCurrentMillionSecond(){return Calendar.getInstance().getTimeInMillis();}}

应用时，可根据具体的情况，要么让你的类实现Timable接口，要么把你的代码直接写到匿名类中即可：

 

//仅举例匿名类的应用public class Test{public static void main(String[] args){ Timing.timing(new Timable(){@Overridepublic void run() {try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}); }}