moonct · moonct · May 11, 2026
diff --git a/pom.xml b/pom.xml
@@ -7,7 +7,7 @@
 
     <properties>
         <!-- Project settings -->
-        <java.version>1.8</java.version>
+        <java.version>25</java.version>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -304,6 +304,12 @@
             <artifactId>xpp3</artifactId>
             <version>${xpp3.version}</version>
         </dependency>
+    <dependency>
+      <groupId>jakarta.annotation</groupId>
+      <artifactId>jakarta.annotation-api</artifactId>
+      <version>1.3.5</version>
+      <scope>provided</scope>
+    </dependency>
         <dependency>
             <groupId>io.github.skylot</groupId>
             <artifactId>jadx-core</artifactId>
@@ -428,11 +434,10 @@
 	        <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.14.1</version>
+                <version>3.15.0</version>
                 <configuration>
-                    <source>${maven.compiler.source}</source>
-                    <target>${maven.compiler.target}</target>
                     <showDeprecation>true</showDeprecation>
+          <release>${java.version}</release>
                 </configuration>
             </plugin>
             <plugin>

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/BytecodeViewer.java b/src/main/java/the/bytecode/club/bytecodeviewer/BytecodeViewer.java
@@ -157,24 +157,24 @@ public class BytecodeViewer
      *
      * @param args files you want to open or CLI
      */
-    public static void main(String[] args)
+    void main(String[] args)
     {
         launchArgs = args;
 
         //CLI startup banner
-        System.out.print("Bytecode Viewer " + VERSION);
+        IO.print("Bytecode Viewer " + VERSION);
 
         if (FAT_JAR)
-            System.out.print(" [Fat Jar]");
+            IO.print(" [Fat Jar]");
 
-        System.out.println(" - https://bytecodeviewer.com\r\nCreated by @Konloch - https://konloch.com\r\nPresented by https://the.bytecode.club");
+        IO.println(" - https://bytecodeviewer.com\r\nCreated by @Konloch - https://konloch.com\r\nPresented by https://the.bytecode.club");
 
         // Set the security manager
         try
         {
             System.setSecurityManager(sm);
         }
-        catch (Throwable t)
+        catch (Throwable _)
         {
             System.err.println("Cannot set security manager! Are you on Java 18+ and have not enabled support for it?");
             System.err.println("Because of this, you may be susceptible to some exploits!");
@@ -280,7 +280,7 @@ public static void boot()
         viewer.setVisible(true);
 
         //print startup time
-        System.out.println("Start up took " + ((System.currentTimeMillis() - Configuration.BOOT_TIMESTAMP) / 1000) + " seconds");
+        IO.println("Start up took " + ((System.currentTimeMillis() - Configuration.BOOT_TIMESTAMP) / 1000) + " seconds");
 
         //request focus on GUI for hotkeys on start
         viewer.requestFocus();
@@ -491,7 +491,7 @@ public static boolean autoCompileSuccessful()
         {
             return compile(false, false);
         }
-        catch (NullPointerException ignored)
+        catch (NullPointerException _)
         {
             return false;
         }
@@ -511,9 +511,8 @@ public static boolean compile(boolean message, boolean successAlert)
 
         for (java.awt.Component c : BytecodeViewer.viewer.workPane.getLoadedViewers())
         {
-            if (c instanceof ClassViewer)
+            if (c instanceof ClassViewer cv)
             {
-                ClassViewer cv = (ClassViewer) c;
 
                 if (noErrors && !cv.bytecodeViewPanel1.compile())
                     noErrors = false;
@@ -791,7 +790,7 @@ public static void cleanup()
         {
             FileUtils.deleteDirectory(tempF);
         }
-        catch (Exception ignored)
+        catch (Exception _)
         {
         }
 

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/Configuration.java b/src/main/java/the/bytecode/club/bytecodeviewer/Configuration.java
@@ -126,7 +126,7 @@ public static File getLastSaveDirectory()
         {
             return new File(".").getCanonicalFile();
         }
-        catch (IOException e)
+        catch (IOException _)
         {
             return new File(".");
         }

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/Constants.java b/src/main/java/the/bytecode/club/bytecodeviewer/Constants.java
@@ -141,7 +141,7 @@ public static String getBCVDirectory()
                     // Hide file by running attrib system command (on Windows)
                     Process p = new ProcessBuilder("attrib", "+H", BCV_DIR.getAbsolutePath()).start();
                 }
-                catch (Exception e)
+                catch (Exception _)
                 {
                     //ignore
                 }

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/Settings.java b/src/main/java/the/bytecode/club/bytecodeviewer/Settings.java
@@ -83,7 +83,7 @@ else if (pluginsFile.exists())
     public static synchronized void addRecentFile(File f)
     {
         recentFiles.remove(f.getAbsolutePath()); // already added on the list
-        recentFiles.add(0, f.getAbsolutePath());
+        recentFiles.addFirst(f.getAbsolutePath());
         MiscUtils.deduplicateAndTrim(recentFiles, maxRecentFiles);
         saveRecentFiles();
         resetRecentFilesMenu();
@@ -115,7 +115,7 @@ public static String getRecentFile()
         if (recentFiles.isEmpty())
             return null;
 
-        return recentFiles.get(0);
+        return recentFiles.getFirst();
     }
 
     /**
@@ -126,7 +126,7 @@ public static String getRecentFile()
     public static synchronized void addRecentPlugin(File f)
     {
         recentPlugins.remove(f.getAbsolutePath()); // already added on the list
-        recentPlugins.add(0, f.getAbsolutePath());
+        recentPlugins.addFirst(f.getAbsolutePath());
         MiscUtils.deduplicateAndTrim(recentPlugins, maxRecentFiles);
         saveRecentPlugins();
         resetRecentFilesMenu();

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/SettingsSerializer.java b/src/main/java/the/bytecode/club/bytecodeviewer/SettingsSerializer.java
@@ -46,7 +46,7 @@ public class SettingsSerializer
 
     public static void saveSettingsAsync()
     {
-        BytecodeViewer.getTaskManager().doOnce(task -> saveSettings());
+        BytecodeViewer.getTaskManager().doOnce(_ -> saveSettings());
     }
 
     public static synchronized void saveSettings()
@@ -236,7 +236,7 @@ public static void preloadSettingsFile()
             //line 129 is used normal loading
             Configuration.language = Language.valueOf(asString(130));
         }
-        catch (IndexOutOfBoundsException e)
+        catch (IndexOutOfBoundsException _)
         {
             //ignore because errors are expected, first start up and outdated settings.
         }
@@ -418,7 +418,7 @@ public static void loadSettings()
             BytecodeViewer.viewer.printLineNumbers.setSelected(asBoolean(142));
             BytecodeViewer.viewer.disableReloadConfirmation.setSelected(asBoolean(143));
         }
-        catch (IndexOutOfBoundsException e)
+        catch (IndexOutOfBoundsException _)
         {
             //ignore because errors are expected, first start up and outdated settings.
         }

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/api/ASMResourceUtil.java b/src/main/java/the/bytecode/club/bytecodeviewer/api/ASMResourceUtil.java
@@ -58,9 +58,8 @@ public static void renameFieldNode(String originalParentName, String originalFie
                 MethodNode m = (MethodNode) o;
                 for (AbstractInsnNode i : m.instructions.toArray())
                 {
-                    if (i instanceof FieldInsnNode)
+                    if (i instanceof FieldInsnNode field)
                     {
-                        FieldInsnNode field = (FieldInsnNode) i;
 
                         if (field.owner.equals(originalParentName)
                             && field.name.equals(originalFieldName)
@@ -89,9 +88,8 @@ public static void renameMethodNode(String originalParentName, String originalMe
                 MethodNode m = (MethodNode) o;
                 for (AbstractInsnNode i : m.instructions.toArray())
                 {
-                    if (i instanceof MethodInsnNode)
+                    if (i instanceof MethodInsnNode mi)
                     {
-                        MethodInsnNode mi = (MethodInsnNode) i;
                         if (mi.owner.equals(originalParentName)
                             && mi.name.equals(originalMethodName)
                             && mi.desc.equals(originalMethodDesc))
@@ -178,24 +176,21 @@ public static void renameClassNode(String oldName, String newName)
 
                 for (AbstractInsnNode i : m.instructions.toArray())
                 {
-                    if (i instanceof TypeInsnNode)
+                    if (i instanceof TypeInsnNode t)
                     {
-                        TypeInsnNode t = (TypeInsnNode) i;
                         if (t.desc.equals(oldName))
                             t.desc = newName;
                     }
 
-                    if (i instanceof MethodInsnNode)
+                    if (i instanceof MethodInsnNode mi)
                     {
-                        MethodInsnNode mi = (MethodInsnNode) i;
                         if (mi.owner.equals(oldName))
                             mi.owner = newName;
                         mi.desc = mi.desc.replace(oldName, newName);
                     }
 
-                    if (i instanceof FieldInsnNode)
+                    if (i instanceof FieldInsnNode fi)
                     {
-                        FieldInsnNode fi = (FieldInsnNode) i;
                         if (fi.owner.equals(oldName))
                             fi.owner = newName;
                         fi.desc = fi.desc.replace(oldName, newName);

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/api/ASMUtil.java b/src/main/java/the/bytecode/club/bytecodeviewer/api/ASMUtil.java
@@ -41,7 +41,7 @@ public static ClassNode bytesToNode(byte[] b)
         {
             cr.accept(cn, ClassReader.EXPAND_FRAMES);
         }
-        catch (Exception e)
+        catch (Exception _)
         {
             cr.accept(cn, ClassReader.SKIP_FRAMES);
         }

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/api/BCV.java b/src/main/java/the/bytecode/club/bytecodeviewer/api/BCV.java
@@ -344,7 +344,7 @@ public static void log(String s)
     public static void log(boolean devModeOnly, String s)
     {
         if (!devModeOnly || DEV_MODE)
-            System.out.println(s);
+            IO.println(s);
     }
 
     /**

diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/api/ExceptionUI.java b/src/main/java/the/bytecode/club/bytecodeviewer/api/ExceptionUI.java
@@ -28,6 +28,7 @@
 import java.awt.*;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.io.Serial;
 import java.io.StringWriter;
 
 import static the.bytecode.club.bytecodeviewer.Constants.*;
@@ -102,7 +103,7 @@ private void setupException(Throwable error, String author)
 
             setupFrame(sw.toString(), author);
         }
-        catch (IOException ignored)
+        catch (IOException _)
         {
         }
     }
@@ -146,5 +147,6 @@ public static String buildErrorLogHeader(String author)
             + ", Java: " + System.getProperty("java.version");
     }
 
+    @Serial
     private static final long serialVersionUID = -5230501978224926296L;
 }
diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/api/PluginConsole.java b/src/main/java/the/bytecode/club/bytecodeviewer/api/PluginConsole.java
@@ -23,6 +23,8 @@
 import the.bytecode.club.bytecodeviewer.plugin.PluginManager;
 import the.bytecode.club.bytecodeviewer.translation.TranslatedStrings;
 
+import java.io.Serial;
+
 /**
  * A simple console GUI.
  *
@@ -56,5 +58,6 @@ public void setVisible(boolean visible)
         super.setVisible(visible);
     }
 
+    @Serial
     private static final long serialVersionUID = -6556940545421437508L;
 }