long startTime = System.currentTimeMillis(); do somethings; long endTime = System.currentTimeMillis(); System.out.println(" need time :"+(endTime - startTime));
long startTime=System.currentTimeMillis(); dosomething; long endTime=System.currentTimeMillis(); long time=endTime-startTime;
do somethings;
long endTime = System.currentTimeMillis();
System.out.println(" need time :"+(endTime - startTime));
long startTime=System.currentTimeMillis();
dosomething;
long endTime=System.currentTimeMillis();
long time=endTime-startTime;