Get package for a name

public class Main {
  public static void main(String[] args) {
    Package p = Package.getPackage("javax.swing");
    System.out.print("Swing Version: ");
    System.out.println(p.getSpecificationVersion());

    p = Package.getPackage("java.awt");
    System.out.print("AWT Version: ");
    System.out.println(p.getSpecificationVersion());

  }
}