public abstract class GetTime {

 public final void getMyTime(){

long startTime=System.currentTimeMillis();

runCode();

long endTime=System.currentTimeMillis();

System.out.println((endTime-startTime));

 }



    public abstract void runCode();

 }



 class SubTime extends GetTime{

    //由子类决定获取运行哪段程序的时间

@Override

public void runCode() {

// TODO Auto-generated method stub

for(int i=0;i<1000;i++){

System.out.println(i);

}

}


 }