feat(jdk14): add demo for JEP 367 - Remove the Pack200 Tools and API

src/main/java/org/javademos/init/Java14DemoLoader.java

@@ -10,6 +10,7 @@
 import org.javademos.java14.jep359.RecordsPreviewDemo;
 import org.javademos.java14.jep361.SwitchExpressionsDemo;
 import org.javademos.java14.jep365.ZGarbageCollectorOnWindows;
+import org.javademos.java14.jep367.Pack200Demo;
 import org.javademos.java14.jep368.TextBlockSecondPreviewDemo;
 import org.javademos.java14.jep370.ForeignMemoryAccessDemo;
 
@@ -25,6 +26,7 @@ public void loadDemos(Map<Integer, IDemo> demos) {
         demos.put(359, new RecordsPreviewDemo());
         demos.put(361, new SwitchExpressionsDemo());
         demos.put(365, new ZGarbageCollectorOnWindows());
+        demos.put(367, new Pack200Demo());
         demos.put(368, new TextBlockSecondPreviewDemo());
         demos.put(370, new ForeignMemoryAccessDemo());
     }

src/main/java/org/javademos/java14/jep367/Pack200Demo.java

@@ -0,0 +1,40 @@
+package org.javademos.java14.jep367;
+
+import org.javademos.commons.IDemo;
+
+/// Demo for JDK 14 feature JEP 367 - Remove the Pack200 Tools and API.
+///
+/// JEP 367 removed the Pack200 API and tools from the JDK. This demo documents the
+/// removal and shows a small runtime check that the `java.util.jar.Pack200` class is
+/// no longer available on the classpath of modern JDKs. Since Pack200 was removed,
+/// attempting to reference the API may fail at runtime (NoClassDefFoundError) when
+/// running on a JDK that no longer contains it.
+///
+/// JEP link: https://openjdk.org/jeps/367
+/// 
+/// @author adripo
+public class Pack200Demo implements IDemo {
+
+    @Override
+    public void demo() {
+        info(367);
+
+        System.out.println("Checking availability of Pack200 classes at runtime...");
+
+        try {
+            // Try to load the Pack200 class reflectively. On JDKs where Pack200
+            // has been removed this will throw ClassNotFoundException.
+            Class.forName("java.util.jar.Pack200");
+            // If the class is present, show a short note:
+            System.out.println("java.util.jar.Pack200 is present on this JVM. Pack200 APIs are available.");
+        } catch (ClassNotFoundException | NoClassDefFoundError ex) {
+            // Expected on JDKs that removed Pack200 (JDK 14 removal)
+            System.out.println("Pack200 classes are NOT available on this JVM (removed by JEP 367).");
+            System.out.println("If you still need Pack200 functionality consider using an external library or alternate packaging/compression.");
+            System.out.println("Pack200 was deprecated for removal earlier and removed by JEP 367 in JDK 14.");
+        }
+
+        System.out.println();
+    }
+
+}

src/main/resources/JDK14Info.json

@@ -39,6 +39,14 @@
     "link": true,
     "code": false
   },
+  {
+    "jep": 367,
+    "jdk": 14,
+    "name": "JEP 367 - Remove the Pack200 Tools and API",
+    "dscr": "Removes the Pack200 tools and API from the JDK. This entry documents the removal and points users to alternatives.",
+    "link": false,
+    "code": true
+  },
   {
     "jep": 368,
     "jdk": 14,