java计算代码执行时间

  

   

    

     

    
    

     

      public class Demo {
     
    
   

    

     

    
    

     
	public static void main(String[] args) throws InterruptedException {
     
    
   

    

     

    
    

     
		long start = System.currentTimeMillis();
     
    
   

    

     

    
    

     
		long sum = 0;
     
    
   

    

     

    
    

     
		for (int i = 0; i <= 100000; i++) {
     
    
   

    

     

    
    

     

      			sum += i;
     
    
   

    

     

    
    

     

      		}
     
    
   

    

     

    
    

     

      		System.out.println("sum = " + sum);
     
    
   

    

     

    
    

     
		long end = System.currentTimeMillis(); 
     
    
   

    

     

    
    

     

      		System.out.println(end - start + "ms");
     
    
   

    

     

    
    

     

      	}
     
    
   

    

     

    
    

     

      }
     
    
  
 

文章来源: laoshifu.blog.csdn.net，作者：红目香薰，版权归原作者所有，如需转载，请联系作者。

原文链接：laoshifu.blog.csdn.net/article/details/115289681