38     public static class LoadGtk {
  39         public static void main(String[] args) {
  40             ((UNIXToolkit)Toolkit.getDefaultToolkit()).loadGTK();
  41         }
  42     }
  43 
  44     public static void main(String[] args) throws Exception {
  45         test(null, "2");
  46         test("2", "2");
  47         test("2.2", "2");
  48         test("3", "3");
  49     }
  50 
  51     private static void test(String version, String expect) throws Exception {
  52         System.out.println( "Test " +
  53                 (version == null ? "no" : " GTK" + version) + " preference.");
  54         Process p = Runtime.getRuntime().exec(System.getProperty("java.home") +
  55                 "/bin/java " +
  56                 (version == null ? "" : "-Djdk.gtk.version=" + version) +
  57                 " -Djdk.gtk.verbose=true " +
  58                 "-XaddExports:java.desktop/sun.awt=ALL-UNNAMED " +
  59                 "-cp " + System.getProperty("java.class.path", ".") +
  60                 " GtkVersionTest$LoadGtk");
  61         p.waitFor();
  62 
  63         try (BufferedReader br = new BufferedReader(
  64                 new InputStreamReader(p.getErrorStream()))) {
  65             String line;
  66             while ((line = br.readLine()) != null) {
  67                 System.out.println(line);
  68                 if (line.contains("Looking for GTK" + expect + " library")) {
  69                     return;
  70                 } else if (line.contains("Looking for GTK")) {
  71                     break;
  72                 }
  73             }
  74             throw new RuntimeException("Wrong GTK library version: \n" + line);
  75         }
  76     }
  77 
  78 }

  38     public static class LoadGtk {
  39         public static void main(String[] args) {
  40             ((UNIXToolkit)Toolkit.getDefaultToolkit()).loadGTK();
  41         }
  42     }
  43 
  44     public static void main(String[] args) throws Exception {
  45         test(null, "2");
  46         test("2", "2");
  47         test("2.2", "2");
  48         test("3", "3");
  49     }
  50 
  51     private static void test(String version, String expect) throws Exception {
  52         System.out.println( "Test " +
  53                 (version == null ? "no" : " GTK" + version) + " preference.");
  54         Process p = Runtime.getRuntime().exec(System.getProperty("java.home") +
  55                 "/bin/java " +
  56                 (version == null ? "" : "-Djdk.gtk.version=" + version) +
  57                 " -Djdk.gtk.verbose=true " +
  58                 "--add-exports=java.desktop/sun.awt=ALL-UNNAMED " +
  59                 "-cp " + System.getProperty("java.class.path", ".") +
  60                 " GtkVersionTest$LoadGtk");
  61         p.waitFor();
  62 
  63         try (BufferedReader br = new BufferedReader(
  64                 new InputStreamReader(p.getErrorStream()))) {
  65             String line;
  66             while ((line = br.readLine()) != null) {
  67                 System.out.println(line);
  68                 if (line.contains("Looking for GTK" + expect + " library")) {
  69                     return;
  70                 } else if (line.contains("Looking for GTK")) {
  71                     break;
  72                 }
  73             }
  74             throw new RuntimeException("Wrong GTK library version: \n" + line);
  75         }
  76     }
  77 
  78 }