Java tutorial
class PackageInfo { public static void main(String[] args) { Package p = Package.getPackage("java.lang"); System.out.println("Name = " + p.getName()); System.out.println("Implementation title = " + p.getImplementationTitle()); System.out.println("Implementation vendor = " + p.getImplementationVendor()); System.out.println("Implementation version = " + p.getImplementationVersion()); System.out.println("Specification title = " + p.getSpecificationTitle()); System.out.println("Specification vendor = " + p.getSpecificationVendor()); System.out.println("Specification version = " + p.getSpecificationVersion()); } }