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Java Hashtable toString() Method with Example

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

Hashtable Class toString() method

• toString() method is available in java.util package.
• toString() method is used to string denotation of this Hashtable.
• toString() 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.
• toString() method does not throw an exception at the time of string denotation.

Syntax:

    public String toString();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is String, it gets string representation of this Hashtable.

Example:

// Java program to demonstrate the example 
// of String toString() method of Hashtable 

import java.util.*;

public class ToStringOfHashtable {
    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 toString() method is used
        //to string representation of this Hashtable

        String ht_str = ht.toString();
        System.out.println("ht.toString(): " + ht_str);
    }
}

Output

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