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Java Hashtable get() Method with Example

Hashtable Class get() method: Here, we are going to learn about the get() method of Hashtable Class with its syntax and example.
Submitted by Preeti Jain, on February 17, 2020

Hashtable Class get() method

• get() method is available in java.util package.
• get() method is used to return the value associated with the given key element (key_ele) in this Hashtable.
• get() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• get() method may throw an exception at the time of returning value associated with the given key element (key_ele).
  NullPointerException This exception may throw when the given key element if null exists.

Syntax:

    public Value get(Object key_ele);

Parameter(s):

• Object key_ele – represents the key element (key_ele) in this Hashtable.

Return value:

The return type of the method is Value, it gets value associated with the given key element (key_ele).

Example:

// Java program to demonstrate the example 
// of Value get(Object key_ele) method of  Hashtable 

import java.util.*;

public class GetOfHashtable {
    public static void main(String[] args) {
        //Instantiate a hashtable object  
        Hashtable ht = new Hashtable();

        // By using put() method is to
        // add the linked values in an
        // Hashtable ht
        ht.put(10, "C");
        ht.put(20, "C++");
        ht.put(30, "JAVA");
        ht.put(40, "PHP");
        ht.put(50, "SFDC");

        // Display Hashtable
        System.out.println("Hashtable: " + ht);

        // By using get() method is to return
        // the value element of the given key
        // element if exists else it returns null
        Object val_ele = ht.get(30);

        // Display val_ele
        System.out.println("ht.get(30): " + val_ele);
    }
}

Output

Hashtable: {10=C, 20=C++, 30=JAVA, 40=PHP, 50=SFDC}
ht.get(30): JAVA