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how to search a value in hashtable?


Hashtable:

Hashtable extends Dictionary class and implements Map interface. It contains elements in key-value pair. It not allowed duplicate key. It is synchronized. It can’t contain null key or value. It uses hashcode() method for finding the position of the elements.

We can use containsValue() method to search a value in hashtable.

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.containsValue("Vivek")){
            System.out.println("The Hashtable contains value Vivek");
        } else {
            System.out.println("The Hashtable does not contains value Vivek");
        }
  }
}

Output

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