在线急等！求JSON合并
classJSON    {"CODE":{"ERROR_CODE":0},"DATA":[{"bj":"初11级02班","classid":"2"}]}
classmateJSON    {"CODE":{"ERROR_CODE":0},"DATA":[{"xm":"张三","identityid":460},{"xm":"李四","identityid":462},{"xm":"王五","identityid":864},{"xm":"赵六","identityid":866}]}


怎么把classmateJSON的DATA部分加在classJSON的DATA里面，形成如下结果
{"CODE":{"ERROR_CODE":0},"DATA":[{"bj":"初11级02班","classid":"2","classmate":[{"xm":"张三","identityid":460},{"xm":"李四","identityid":462},{"xm":"王五","identityid":864},{"xm":"赵六","identityid":866}]}]}

在线等，急求！写明代码最好 谢谢！！
------解决方案--------------------

	String a = "{'CODE':{'ERROR_CODE':0},'DATA':[{'bj':'初11级02班','classid':'2'}]}";

		String b =  "{'CODE':{'ERROR_CODE':0},'DATA':[{'xm':'张三','identityid':460},{'xm':'李四','identityid':462},{'xm':'王五','identityid':864},{'xm':'赵六','identityid':866}]}";

	

		JSONObject ja = JSONObject.fromObject(a); 

		JSONObject jb = JSONObject.fromObject(b); 

		

		ja.getJSONArray("DATA").getJSONObject(0).put("classmate",jb.get("DATA"));

		System.out.println(ja.toString());