public class Package (java.lang)
Output of the program
How to write an immutable Class in Java
Package objects contain version information about the implementation and specification of a Java package. The version information is retrieved and made available by the ClassLoader instance that loaded the class(es).
Typically, it is stored in the manifest that is distributed with the classes.
Example of Package Class
package com.self.practise; public class PackageClass { public static void main(String[] args) { Package pac = Package.getPackage("java.lang");
System.out.println(pac.getImplementationVersion()); System.out.println(pac.getSpecificationVendor()); System.out.println(pac.getImplementationTitle()); System.out.println(pac.isSealed()); System.out.println(pac.getSpecificationTitle()); } }
Output of the program
1.7.0_75 Oracle Corporation Java Runtime Environment false Java Platform API Specification
How to write an immutable Class in Java
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