TreeMap isEmpty() in Java

isEmpty(): This method is available in java.util.TreeMap class of Java.

Syntax:

boolean java.util.AbstractMap.isEmpty()

This method returns true if this map contains no key-value mappings.

Parameters: NA

Returns: true if this map contains no key-value mappings.

Exceptions: NA

Approach

Java

import java.util.TreeMap;

public class TreeMapisEmpty {
    public static void main(String[] args) {

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

        treeMap.put(2, "Hello");
        treeMap.put(11, "Java");
        treeMap.put(23, "Program");
        treeMap.put(6, "C++");
        treeMap.put(25, "Program");

        System.out.println(treeMap.isEmpty());

    }
}

Output:

false