用Java测量运行时间
有时，您可能需要以毫秒为单位测量时间点。因此，让我们再次重写上面的示例-
示例
import java.util.*;
public class DiffDemo {
public static void main(String args[]) {
try {
long start = System.currentTimeMillis( );
System.out.println(new Date( ) + "\n");
Thread.sleep(5*60*10);
System.out.println(new Date( ) + "\n");
long end = System.currentTimeMillis( );
long diff = end - start;
System.out.println("Difference is : " + diff);
} catch (Exception e) {
System.out.println("有一个例外！");
}
}
}这将产生以下结果-
输出结果
Sun May 03 18:16:51 GMT 2009 Sun May 03 18:16:57 GMT 2009 Difference is : 5993