public class PackageInfo{
	public static void main(String[] args){
		if(args.length == 0){
			System.err.println("usage: java PackageInfo packageName [version]");
			return;
		}
		
		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]));
		}
	}
}