替换{0}为指定的字符串(MessageFormat)

 package com.text;  

 import java.text.MessageFormat;  

 /**替换{0}为指定的字符串*/
 public class MessageFormatTest {
     public static void main(String[] args) {
         String message = "hello {0}{1}";
         message  =  MessageFormat.format(message ,"world","!!!");
         System.out.println(message);
     }
 }  

<script type="text/javascript">
String.prototype.format=function()
{
  if(arguments.length==0) return this;
  for(var s=this, i=0; i<arguments.length; i++)
    s=s.replace(new RegExp("\\{"+i+"\\}","g"), arguments[i]);
  return s;
};  

alert("js实现用自符串替换占位符{0} {1} {2}".format("I", "LOVE", "YOU"));
</script>