Java - Get package information

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Description

Get package information

Demo

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

    if (args.length == 0) {
      System.err.println("usage: java PackageInfo packageName [version]");
      return;//  w  w w  .  j  a  v a 2 s  .co  m
    }

    Package pkg = Package.getPackage(args[0]);

    if (pkg == null) {
      System.err.println(args[0] + " not found");
      return;
    }

    System.out.println("Name: " + pkg.getName());
    System.out.println("Implementation title: " +
        pkg.getImplementationTitle());
    System.out.println("Implementation vendor: " +
        pkg.getImplementationVendor());
    System.out.println("Implementation version: " +
        pkg.getImplementationVersion());
    System.out.println("Specification title: " +
        pkg.getSpecificationTitle());
    System.out.println("Specification vendor: " +
        pkg.getSpecificationVendor());
    System.out.println("Specification version: " +
        pkg.getSpecificationVersion());
    System.out.println("Sealed: " + pkg.isSealed());
    if (args.length > 1)
      System.out.println("Compatible with " + args[1] + ": " +
          pkg.isCompatibleWith(args[1]));
  }
}

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