public class Test4  
{  
    public static void main(String[] args)  
    {  
        long times = 999999999;  
        String str = "";  
  
        long a1 = System.currentTimeMillis();  
        for (long i = 0; i < times && str.isEmpty(); i++)  
        {  
            // System.out.println(str.isEmpty());  
        }  
        long a2 = System.currentTimeMillis();  
        System.out.println("str.isEmpty() times: " + (a2 - a1));  
  
        long b1 = System.currentTimeMillis();  
        for (long i = 0; i < times && "".equals(str); i++)  
        {  
            // System.out.println("".equals(str));  
        }  
        long b2 = System.currentTimeMillis();  
        System.out.println("\"\".equals(str) times: " + (b2 - b1));  
    }  
}  


//java/6227