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JSON Accumulate All 

JSON-lib is a java library for serializing and de-serializing java beans, maps, arrays and collections in JSON format. Get the latest binaries from sourceforge http://json-lib.sourceforge.net/. This requires the libraries ( json-lib-2.4-jdk15.jar, xom-1.2.7.jar, ezmorph.jar commons-lang.jar, commons-collections.jar, commons-beanutils-1.7.jar and commons-logging-1.1.1.jar) to be in classpath. The following example shows using accumulateAll method of JSONObject.

File Name  :  
com/bethecoder/tutorials/json_lib/tests/JsonAccumulateAll.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.json_lib.tests;

import java.util.HashMap;
import java.util.Map;

import net.sf.json.JSONObject;

public class JsonAccumulateAll {

  /**
   @param args
   */
  public static void main(String[] args) {

    JSONObject jsonObj = new JSONObject();
    jsonObj.put("certificates""SCJA");
    jsonObj.put("prev_ranks""Rank#2");
    System.out.println(jsonObj.toString(2));
    
    Map<String, Object> map = new HashMap<String, Object>();
    map.put("certificates""SCJP");
    map.put("prev_ranks""Rank#1");
    jsonObj.accumulateAll(map);
    
    System.out.println(jsonObj.toString(2))//pretty print with indent
  }

}
   

It gives the following output,
{
  "certificates": "SCJA",
  "prev_ranks": "Rank#2"
}


{
  "certificates":   [
    "SCJA",
    "SCJP"
  ],
  "prev_ranks":   [
    "Rank#2",
    "Rank#1"
  ]
}


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