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Search a key in hashtable

We can use containsKey() method to search a key in hashtable.

Syntax:

hashtable.containsKey(specifiedKey);

Example:

package com.codesjava;
 
import java.util.Hashtable;
 
public class Test {
  public static void main(String args[]){
	//Create Hashtable object.
	Hashtable<String, String> hashtable = new Hashtable<String, String>();
	//Add objects to the Hashtable.
	hashtable.put("1", "Jai");
	hashtable.put("2", "Mahesh");
	hashtable.put("3","Vivek");
        System.out.println(hashtable);
        if(hashtable.containsKey("2")){
            System.out.println("The Hashtable contains key 2");
        } else {
            System.out.println("The Hashtable does not contains key 2");
        }
  }
}

Output

{3=Vivek, 2=Mahesh, 1=Jai}
The Hashtable contains key 2
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