LinkedHashMap containsKey(Object) in Java

containsKey(Object): This method is available in java.util.LinkedHashMap class of Java.

Syntax:

boolean java.util.HashMap.containsKey(Object key)

This method takes one argument. This method returns true if this map contains a mapping for the specified key.

Parameters: One parameter is required for this method.

key: The key whose presence in this map is to be tested.

Returns: true if this map contains a mapping for the specified key.

Exceptions: NA

Approach

Java

import java.util.LinkedHashMap;

public class LinkedHashMapcontainsKey {

    public static void main(String args[]) {

        LinkedHashMap<String, Integer> linkedHashMap = 
                new LinkedHashMap<String, Integer>();

        linkedHashMap.put("Java", 1);
        linkedHashMap.put("Hello", 2);

        Object key = "Hello";

        System.out.println(linkedHashMap.containsKey(key));
    }

}

Output:

true