Adding element to a TreeMap and iterating using iterator and printing its key-value set

 

import java.util.Iterator;

import java.util.TreeMap;

public class TreeMapPut {

public static void main(String[] args) {

//creating our tree map

TreeMap<Integer, String> tm = new TreeMap<>();

//Inserting element in our TreeMap

tm.put(17, "this");

tm.put(13, "Invent");

tm.put(18, "blog");

tm.put(16, "on");

tm.put(15, "you");

tm.put(14, "welcomes");

tm.put(12, "Java");

Iterator itr = tm.keySet().iterator();

while (itr.hasNext()) {

Integer key = (Integer) itr.next();

String value = tm.get(key);

System.out.println(key + "---->" + value);

}

}

}