Check if a particular key exists in HashMap - Java Collection Framework

Description

Check if a particular key exists in HashMap

Demo Code

 
import java.util.HashMap;
 
public class Main {
 
  public static void main(String[] args) {
    HashMap hMap = new HashMap();
    hMap.put("1","One");
    hMap.put("2","Two");
    hMap.put("3","Three");
   //from w w  w. j  av  a 2s .  c o  m
    boolean blnExists = hMap.containsKey("3");
    System.out.println("3 exists in HashMap ? : " + blnExists);
  }
}

Result

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