long start,end;
start = System.currentTimeMillis();
end = System.currentTimeMillis();
System.out.println("开始时间:" + start);
System.out.println("结束时间:" + end);
System.out.println("运行时间:" + (end - start) + "(ms)");
long start,end;
start = System.currentTimeMillis();
end = System.currentTimeMillis();
System.out.println("开始时间:" + start);
System.out.println("结束时间:" + end);
System.out.println("运行时间:" + (end - start) + "(ms)");