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Java TreeMap lastEntry() Method with Example

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

TreeMap Class lastEntry() method

• lastEntry() method is available in java.util package.
• lastEntry() method is used to return the entry (key-value pairs) that exists with the largest key element value in this TreeMap.
• lastEntry() 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.
• lastEntry() method does not throw an exception at the time of returning last entry.

Syntax:

    public Map.Entry lastEntry();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is Map.Entry, it returns those key-value pairs with the greatest key element value otherwise it returns null.

Example:

// Java program to demonstrate the example 
// of Map.Entry lastEntry() method of TreeMap 

import java.util.*;

public class LastEntryOfTreeMap {
    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 tm
        System.out.println("tm: " + tm);

        // By using lastEntry() method is
        // used to return the key-value pairs
        // linked with the largest key element 
        // value i.e. 4
        // Display Returned Key-Value Element
        System.out.println("tm.lastEntry(): " + tm.lastEntry());
    }
}

Output

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