Java 字符串创建性能比较

public class StringComparePerformance {
   public static void main(String[] args) {      
      long startTime = System.currentTimeMillis();

      for(int i=0;i<50000;i++) {
         String s1 = "hello";
         String s2 = "hello";
      }
      long endTime = System.currentTimeMillis();
      System.out.println("Time taken for creation"
         + " of String literals : "+ (endTime - startTime)
         + " milli seconds" );       
      long startTime1 = System.currentTimeMillis();

      for(int i=0;i<50000;i++) {
         String s3 = new String("hello");
         String s4 = new String("hello");
      }
      long endTime1 = System.currentTimeMillis();
      System.out.println("Time taken for creation"
         + " of String objects : " + (endTime1 - startTime1)
         + " milli seconds");
   }
}