Can we use Linq for geting value from collection object in java? -

now days working on blackberry within parse json array string , convert hashtable this

this json string

[    {          "stdid":"a1",   "rollno":"23",  "class":"first"  },  {          "stdid":"a2",   "rollno":"13",  "class":"first"  },  {          "stdid":"a3",   "rollno":"53",  "class":"second"  },  {          "stdid":"a4",   "rollno":"33",  "class":"third"  },   ] 

and parse hashtable as

hashtable t1=new hashtable(); t1.put("stdid","a1"); t1.put("rollno","23"); t1.put("class","first"); hashtable t2=new hashtable(); t2.put("stdid","a2"); t2.put("rollno","13"); t2.put("class","first"); hashtable t3=new hashtable(); t3.put("stdid","a3"); t3.put("rollno","53"); t3.put("class","second"); hashtable t4=new hashtable(); t4.put("stdid","a4"); t4.put("rollno","33"); t4.put("class","third");  hashtable main=new hashtable ();  main.put(new integer(1), t1); main.put(new integer(2), t2); main.put(new integer(3), t3); main.put(new integer(4), t4); 

so can i/ how can retrieve value as

select students have first class

so 1 can me? possible linq ?

uhm... yes! need library java linq stuff: //github.com/nicholas22/jpropel-light

how it:

import java.util.hashtable; import lombok.extensionmethod; import propel.core.utils.linq; import java.util.list; import lombok.function;  @extensionmethod({linq.class}) public class main {    public static void main(string[] args)   {     hashtable t1=new hashtable();     t1.put("stdid","a1");     t1.put("rollno","23");     t1.put("class","first");     hashtable t2=new hashtable();     t2.put("stdid","a2");     t2.put("rollno","13");     t2.put("class","first");     hashtable t3=new hashtable();     t3.put("stdid","a3");     t3.put("rollno","53");     t3.put("class","second");     hashtable t4=new hashtable();     t4.put("stdid","a4");     t4.put("rollno","33");     t4.put("class","third");      hashtable main = new hashtable();     main.put(new integer(1), t1);     main.put(new integer(2), t2);     main.put(new integer(3), t3);     main.put(new integer(4), t4);      list<hashtable> result= main.values().where(classequals("first")).tolist();     for(hashtable ht : result)       system.out.println(ht.get("stdid"));   }     @function   private static boolean classequals(hashtable table, string _class) {     return table.get("class") != null && table.get("class").equals(_class);   } }