package demos.misc; /** * VersionInfo.java <BR> * author: Travis Bryson <P> * * This program returns the version and implementation information for the Java * Bindings for OpenGL (R) implementation found in the CLASSPATH. This information * is also found in the manifest for jogl.jar, and this program uses the * java.lang.Package class to retrieve it programatically. **/ public class VersionInfo { public VersionInfo() { ClassLoader classLoader = getClass().getClassLoader(); pkgInfo(classLoader, "javax.media.opengl", "GL"); } static void pkgInfo(ClassLoader classLoader, String pkgName, String className) { try { classLoader.loadClass(pkgName + "." + className); Package p = Package.getPackage(pkgName); if (p == null) { System.out.println("WARNING: Package.getPackage(" + pkgName + ") is null"); } else { System.out.println(p); System.out.println("Specification Title = " + p.getSpecificationTitle()); System.out.println("Specification Vendor = " + p.getSpecificationVendor()); System.out.println("Specification Version = " + p.getSpecificationVersion()); System.out.println("Implementation Vendor = " + p.getImplementationVendor()); System.out.println("Implementation Version = " + p.getImplementationVersion()); } } catch (ClassNotFoundException e) { System.out.println("Unable to load " + pkgName); } System.out.println(); } public static void main(String[] args) { new VersionInfo(); } }