Class hashCode() method in Java with Examples

The hashCode() method of java.lang.Class class is used to get the hashCode representation of this entity. This method returns an integer value which is the hashCode.

Syntax:

public int hashCode()

Parameter: This method does not accept any parameter.

Return Value: This method returns an integer value which is the hashCode.

Below programs demonstrate the hashCode() method.

Example 1:

// Java program to demonstrate hashCode() method

public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object for the class
        // with the specified name
        Class c1 = Class.forName("java.lang.String");

        System.out.println("Class represented by c1: "
                         + c1);

        // hashCode method on c1
        System.out.println("HashCode value: "
                           + c1.hashCode());
    }
}

Output:

Class represented by c1: class java.lang.String
HashCode value: 589431969

Example 2:

// Java program to demonstrate hashCode() method

public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object for the class
        // with the specified name
        Class c1 = int.class;

        System.out.println("Class represented by c1: "
                         + c1);

        // hashCode method on c1
        System.out.println("HashCode value: "
                           + c1.hashCode());
    }
}

Output:

Class represented by c1: int
HashCode value: 589431969

Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#hashCode–