In this example we will show how to check if LinkedHashMap object contains a particular key using containsKey method of LinkedHashMap class.
Source Code
package com.beginner.examples;
import java.util.LinkedHashMap;
public class CheckKeyOfLinkedHashMap {
public static void main(String[] args) {
//create LinkedHashMap.
LinkedHashMap linkedHashMap = new LinkedHashMap();
linkedHashMap.put("1","Alice");
linkedHashMap.put("2","Bob");
linkedHashMap.put("3","Jack");
/*
* To check whether a particular key exists in LinkedHashMap use containsKey(Object key) method of LinkedHashMap.
*/
boolean result = linkedHashMap.containsKey("3");
System.out.println("3 exists in LinkedHashMap ? : " + result);
}
}
Output:
3 exists in LinkedHashMap ? : true
References
Imported packages in Java documentation: