Question

How to check if specific key exists in LinkedHashMap in Java

Answer 1

package javaapplication1;

import java.util.LinkedHashMap;

public class JavaApplication1 {

    public static void main(String[] args) {

        LinkedHashMap lHashMap = new LinkedHashMap();
   
        // key value pairs
        lHashMap.put("1", "Java");
        lHashMap.put("2", "C#");
        lHashMap.put("3", "C++");
        lHashMap.put("4", "C");
        lHashMap.put("5", "PHP");

        boolean b = lHashMap.containsKey("4");
        System.out.println(b);
  }
}
  
/*
run:

true

*/

 

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