Java and TreeMap

package com.java.myapp;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;

public class MyClass {

	public static void main(String[] args) {
	   
		 TreeMap<String, String> tree = new TreeMap<String, String>();
		 
		 tree.put("Tel", "0819876107");
		 tree.put("MemberID", "1");
		 tree.put("Name", "Weerachai");
		 tree.put("Tel", "0819876107");
		 tree.put("Tel", "0819876107");
		  
		 Set<Entry<String, String>> set = tree.entrySet();

	      Iterator<Entry<String, String>> it = set.iterator();
	      while (it.hasNext()) {
	    	  Map.Entry me = (Map.Entry)it.next();
	          System.out.print("Key = " + me.getKey() + " , ");
	          System.out.println("Value = " + me.getValue());
	      }	     
		
	}
	
}