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Asked: 2026-05-23T12:10:24+00:00

I know how to use $.each in my program which is written in Java

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I know how to use $.each in my program which is written in Java
like this 

$.each( ['a','b','c'], function(i, l){ 
   alert( "Index #" + i + ": " + l ); 
 });

what about If I want to pass arraylist or string array from my java program to the JQuery any one knows how??

I wrote

String[] arr1=new String[2];
arr1[1]="whatever";
arr1[2]="ksj";
$.each( arr1, function(i, l){ 
   alert( "Index #" + i + ": " + l );
 }

but it does not work?

Update:: I have jsp page which contains part of java as follows:

<%@page import="java.lang.reflect.Array"%>
<%@page import="java.util.ArrayList"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>

        <style>
            .highlight { background-color: yellow }
        </style>
    </head>
    <body>
        <h1>Hello World!</h1>
        <%  ArrayList wordslist = new ArrayList();
      wordslist.add("Hello");
      wordslist.add("again");

     String[] arr1=new String[wordslist.size()];
      for (int i=0; i<wordslist.size();i++)
      {
     arr1[i]=wordslist.get(i).toString();
        }%>



        <a href="http://jquery.com/">jQuery</a>

        <p> Hello again and again</p>
          <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
       <script src="jquery.highlight-3.js"></script>
       <script>

        $(document).ready(function(){
       alert( arr1 );     
      var arr=new Array();
      arr.

$.each( arr, function(i, l){ 
   alert( "Index #" + i + ": " + l );
 }
)


     });

       </script> 
    </body>
</html>

The problem is wordslist arry is dynamic and I want to pass it to the JQuery ?? How can I do that without using inline embedded java please help Is there a way to pass wordslist to arr array in the Jquery!!!
This really make me disappointed!!

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1 Answer

  1. Editorial Team

    Use a JSON library for Java. Then serialize your ArrayList to JSON:

    ArrayList wordslist = new ArrayList();
wordslist.add("Hello");
wordslist.add("again");

String json = (new JSONArray(wordslist)).toString();

    Echo the JSON text at the appropriate place in your JavaScript code. E.g.

    $(document).ready(function(){    
    var arr = <%= json %>;
    $.each( arr, function(i, l){ 
        alert( "Index #" + i + ": " + l );
    });
});

    I’m actually not sure whether this is the right JSP syntax for printing a variable. Please correct if not.

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