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Java Hashtable equals() Method with Example

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

Hashtable Class equals() method

• equals() method is available in java.util package.
• equals() method is used to check whether equality of this Hashtable with the given Object or not.
• equals() 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.
• equals() method does not throw an exception at the time of checking the equality of two objects.

Syntax:

    public boolean equals(Object ob);

Parameter(s):

• Object ob – represents the object to be checked for equality.

Return value:

The return type of the method is boolean,

• It returns true when this Hashtable is the same as the given object.
• It returns false when this Hashtable is not the same as the given object.

Example:

// Java program to demonstrate the example 
// of boolean equals(Object ob) method of Hashtable 

import java.util.*;

public class EqualsOfHashtable {
    public static void main(String[] args) {
        // Instantiate two hashtable object  
        Hashtable ht = new Hashtable();
        Hashtable comp_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");

        // By using put() method is to
        // add the linked values in an
        // Hashtable comp_ht
        comp_ht.put(60, "COBOL");
        comp_ht.put(70, "HTML");

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

        // By using equals() method isto
        // check equality of two hashtable objects
        boolean status = ht.equals(comp_ht);

        // Display Status of Hashtable
        System.out.println("ht.equals(comp_ht): " + status);
    }
}

Output

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