JAVA EE: How to get the package information of the class using Java Reflection

Thursday, 26 October 2017

How to get the package information of the class using Java Reflection | Reflection in java

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ReflectionDemo.java

import java.util.ArrayList;

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

        Class<ArrayList> classObj = ArrayList.class;
        /*
         * Gets the package for this class. The class loader of this class is
         * used to find the package.
         */
        Package packageObj = classObj.getPackage();
        /*
         * Returns:The fully-qualified name of this package
         */
        System.out.println("Package Name = " + packageObj.getName());
        /*
         * Returns:the title of the implementation, null is returned if it is not known.
         */
        System.out.println("ImplementationTitle = "+packageObj.getImplementationTitle());
        /*
         * Returns:the version of the implementation, null is returned if it is not known.
         */
        System.out.println("ImplementationVersion = "+packageObj.getImplementationVersion());
        /*
         * Returns:the specification vendor, null is returned if it is not known.
         */
        System.out.println("SpecificationVendor = "+packageObj.getSpecificationVendor());
        
        /*
         * Returns:the specification title, null is returned if it is not known.
         */
        System.out.println("SpecificationTitle = "+packageObj.getSpecificationTitle());
    }

}

Output

Package Name = java.util
ImplementationTitle = Java Runtime Environment
ImplementationVersion = 1.8.0_144
SpecificationVendor = Oracle Corporation
SpecificationTitle = Java Platform API Specification