Home » Java programming language

Java TreeMap values() Method with Example

TreeMap Class values() method: Here, we are going to learn about the values() method of TreeMap Class with its syntax and example.
Submitted by Preeti Jain, on February 29, 2020

TreeMap Class values() method

• values() method is available in java.util package.
• values() method is used to returns a set of values that exists in this TreeMap to be viewed in a Collection.
• values() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• values() method does not throw an exception at the time of returning values set.

Syntax:

    public Collection values();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is Collection, it returns all values exists in this TreeMap in a Collection view.

Example:

// Java program to demonstrate the example 
// of Collection values() method of TreeMap 

import java.util.*;

public class ValuesOfTreeMap {
    public static void main(String[] args) {
        // Instantiates TreeMap
        TreeMap < Integer, String > tm = new TreeMap < Integer, String > ();

        // By using put() method is
        // to put the key-value pairs in
        // treemap tm
        tm.put(1, "C");
        tm.put(4, "C++");
        tm.put(3, "Java");
        tm.put(2, "Php");

        // Display TreeMap tm1
        System.out.println("tm: " + tm);

        // By using values() method is to
        // get all the values of TreeMap to 
        // be viewed in a Collection
        Collection co = tm.values();

        // Display Collection view
        System.out.println("tm.values(): " + co);
    }
}

Output

tm: {1=C, 2=Php, 3=Java, 4=C++}
tm.values(): [C, Php, Java, C++]