Iterate through the values of TreeMap in Java

Java 8Object Oriented ProgrammingProgramming

Use Iterator and the values() method to iterate through the values of TreeMap.

Let us first create a TreeMap and add some elements −

TreeMap<Integer,String> m = new TreeMap<Integer,String>();
m.put(1,"PHP");
m.put(2,"jQuery");
m.put(3,"JavaScript");
m.put(4,"Ruby");
m.put(5,"Java");
m.put(6,"AngularJS");
m.put(7,"ExpressJS");

Iterate through the values −

Collection res = m.values();
Iterator i = res.iterator();
while (i.hasNext()) {
   System.out.println(i.next());
}

The following is the complete example to iterate through the values −

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]) {
      TreeMap<Integer,String> m = new TreeMap<Integer,String>();
      m.put(1,"PHP");
      m.put(2,"jQuery");
      m.put(3,"JavaScript");
      m.put(4,"Ruby");
      m.put(5,"Java");
      m.put(6,"AngularJS");
      m.put(7,"ExpressJS");
      System.out.println("TreeMap Elements...");
      Collection res = m.values();
      Iterator i = res.iterator();
      while (i.hasNext()) {
         System.out.println(i.next());
      }
   }
}

Output

TreeMap Elements...
PHP
jQuery
JavaScript
Ruby
Java
AngularJS
ExpressJS
raja
Published on 30-Jan-2019 06:56:02
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