Package hashCode() method in Java with Examples

Last Updated : 12 Jul, 2025

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--
 

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