测试java代码运行时间

DiffDemo.java

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( "Got an exception!" );
        }
    }
}