What is the HashTable.get() method in Java?

The HashTable.get() method is present in the HashTable class inside the java.util package.

The HashTable.get() method is used to retrieve the value of the passed key from the HashTable.

Parameter

The HashTable.get() method takes one parameter:

  • key: The key whose corresponding value needs to be retrieved from the HashTable.

Return

The HashTable.get() method returns the value elements associated with the key.

Code

Let’s take a look at the below code snippet.

import java.util.*;
class Main
{
    public static void main(String[] args) 
    {
        Hashtable<Integer, String> h1 = new Hashtable<Integer, String>();
        h1.put(1, "Let's");
        h1.put(5, "see");
        h1.put(2, "Hashtable.contains()");
        h1.put(27, "method");
        h1.put(9, "in java.");
        System.out.println("The value with key=9 is: " + h1.get(9));
        System.out.println("The value with key=5 is: " + h1.get(5));
        System.out.println("The value with key=27 is: " + h1.get(27));
    }
}

Explanation

  • In line 1, we import the required package.
  • In line 2, we make a Main class.
  • In line 4, we make a main function.
  • In line 6, we declare a HashTable consisting of Integer type keys and String type values.
  • In lines 8 to 12, we insert values in the HashTable by using the Hashtable.put() method.
  • In lines 14 to 16, we display the value element for the corresponding key passed as an argument by using the HashTable.get() method.

In this way, we can use HashTable.get() method to retrieve the value of the passed key from the HashTable.

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