Two methods of obtaining time interval in Java

 Method 1: java.util.Date

 long s = new Date().getTime();
 long e = new Date().getTime();
 System.out.println((e-s)/1000);//单位秒

Method 2: System.currentTimeMillis()

long s = System.currentTimeMillis();
long e = System.currentTimeMillis();
System.out.println((e-s)/1000);