Source Code : Check if a particular key exists in Java Hashtable

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Check if a particular key exists in Java Hashtable

     

import java.util.Hashtable;

public class Main {
  public static void main(String[] args) {
    Hashtable<String, String> ht = new Hashtable<String, String>();
    ht.put("1", "One");
    ht.put("2", "Two");
    ht.put("3", "Three");

    boolean blnExists = ht.containsKey("2");
    System.out.println("2 exists in Hashtable ? : " + blnExists);
  }
}

   
    
    
    
    
  

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