下面这个action,为什么JSONArray jsonlist = JSONArray.fromObject( "['

下面这个action,为什么JSONArray jsonlist = JSONArray.fromObject( "['json','is','easy']" );会异常呢

代码如下：
package com.jackie.action;
import java.util.ArrayList;
import java.util.List;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import com.jackie.entity.PMaxIdEntity;
import com.jackie.entity.userEntity;
import com.jackie.service.MaxIdService;
public class PMaxId {
MaxIdService service;
List maxidList;
public String getMaxId(){
//maxidList = service.queryAll();
List userlist = new ArrayList();
userEntity user1 = new userEntity();
user1.setPassword("123123");
user1.setUsername("user1");
userEntity user2 = new userEntity();
user2.setPassword("345345");
user2.setUsername("user2");
userlist.add(user1);
userlist.add(user2);
JSONArray jsonlist = JSONArray.fromObject( "['json','is','easy']" );
System.out.println(jsonlist);
JSONObject jsondata = JSONObject.fromObject(user1);
System.out.println(jsondata);
return null;
}
public MaxIdService getService() {
return service;
}
public void setService(MaxIdService service) {
this.service = service;
}
public List getMaxidList() {
return maxidList;
}
public void setMaxidList(List maxidList) {
this.maxidList = maxidList;
}
}