Package hashCode() method in Java with Examples

The hashCode() method of java.lang.Package class is used to get the hashCode value of this package instance. The method returns the hashCode value as an integer value.
Syntax:

public int hashCode()

Parameter: This method does not accepts any parameter.
Return Value: This method returns the hashCode value as an integer value.
Below programs demonstrate the hashCode() method.
Example 1:

Java

// Java program to demonstrate
// hashCode() method

public class Test {
    public static void main(String[] args)
    {

        // returns the Package
        // object for this package
        Package myPackage
            = Package.getPackage("java.lang");

        System.out.println(
            "Package represented by myPackage: "
            + myPackage.toString());

        // get the hashCode value of this package
        // using hashCode() method
        System.out.println(
            "hashCode value: "
            + myPackage.hashCode());
    }
}

Output:

Package represented by myPackage: package java.lang, Java Platform API Specification, version 1.8
hashCode value: -888658374

Example 2:

Java

// Java program to demonstrate
// hashCode() method

public class Test {
    public static void main(String[] args)
    {

        // returns the Package
        // object for this package
        Package myPackage
            = Package.getPackage("java.io");

        System.out.println(
            "Package represented by myPackage: "
            + myPackage.toString());

        // get the hashCode value of this package
        // using hashCode() method
        System.out.println(
            "hashCode value: "
            + myPackage.hashCode());
    }
}

Output:

Package represented by myPackage: package java.io, Java Platform API Specification, version 1.8
hashCode value: -1819917198

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