Check if a particular key exists in Java LinkedHashMap

package org.best.example;
   
        /*
      Check if a particular key exists in Java LinkedHashMap example
      This Java Example shows how to check if LinkedHashMap object contains a particular
      key using containsKey method of LinkedHashMap class.
    */
    
    import java.util.LinkedHashMap;
    
    public class CheckKeyOfLinkedHashMapExample {
    
    public static void main(String[] args) {
    
    //create LinkedHashMap object
    LinkedHashMap lHashMap = new LinkedHashMap();
    
    //add key value pairs to LinkedHashMap
    lHashMap.put("1","One");
    lHashMap.put("2","Two");
    lHashMap.put("3","Three");
    
    /*
      To check whether a particular key exists in LinkedHashMap use
      boolean containsKey(Object key) method of LinkedHashMap class.
      It returns true if the LinkedHashMap contains mapping for specified key
      otherwise false.
      */
    
    boolean blnExists = lHashMap.containsKey("3");
    System.out.println("3 exists in LinkedHashMap ? : " + blnExists);
    }
    }
    
    /*
    Output would be
    3 exists in LinkedHashMap ? : true
    */