Added Java 22 version downgrader

Author: RaphiMC

README.md

@@ -5,7 +5,7 @@ To use JavaDowngrader as a library in your application, check out the [Usage (As
 If you just want to downgrade .jar files you can check out the [Usage (Standalone)](#usage-standalonebootstrap) section.
 
 ## Features
-- Supports up to Java 21 and down to Java 8
+- Supports up to Java 22 and down to Java 8
 - Downgrades language features
 - Downgrades important Java API calls
 - Can be applied during runtime

src/main/java/net/raphimc/javadowngrader/JavaDowngrader.java

@@ -30,6 +30,7 @@
 import net.raphimc.javadowngrader.transformer.j18.Java19ToJava18;
 import net.raphimc.javadowngrader.transformer.j19.Java20ToJava19;
 import net.raphimc.javadowngrader.transformer.j20.Java21ToJava20;
+import net.raphimc.javadowngrader.transformer.j21.Java22ToJava21;
 import net.raphimc.javadowngrader.transformer.j8.Java9ToJava8;
 import net.raphimc.javadowngrader.transformer.j9.Java10ToJava9;
 import org.objectweb.asm.tree.ClassNode;
@@ -42,6 +43,7 @@ public class JavaDowngrader {
     private static final List<DowngradingTransformer> TRANSFORMER = new ArrayList<>();
 
     static {
+        TRANSFORMER.add(new Java22ToJava21());
         TRANSFORMER.add(new Java21ToJava20());
         TRANSFORMER.add(new Java20ToJava19());
         TRANSFORMER.add(new Java19ToJava18());

src/main/java/net/raphimc/javadowngrader/transformer/j21/Java22ToJava21.java

@@ -0,0 +1,29 @@
+/*
+ * This file is part of JavaDowngrader - https://github.com/RaphiMC/JavaDowngrader
+ * Copyright (C) 2023-2024 RK_01/RaphiMC and contributors
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package net.raphimc.javadowngrader.transformer.j21;
+
+import net.raphimc.javadowngrader.transformer.DowngradingTransformer;
+import org.objectweb.asm.Opcodes;
+
+public class Java22ToJava21 extends DowngradingTransformer {
+
+    public Java22ToJava21() {
+        super(Opcodes.V22, Opcodes.V21);
+    }
+
+}