jclasslib bytecode editor is a tool that visualizes all aspects of compiled Java class files and the contained bytecode.

Last update: Jan 4, 2023

Overview

jclasslib bytecode editor

Download

Installers can be downloaded from the releases section.

Purpose

jclasslib bytecode editor is a tool that visualizes all aspects of compiled Java class files and the contained bytecode. Many aspects of class files can be edited in the UI. In addition, it contains a library that enables developers to read and write Java class files and bytecode.

Editing

All constant pool entries can be edited. Referenced constant pool entries can directly be edited from the context menu that is shown by the "Edit" button of attributes and constant pool entries.

Bytecode instructions can be edited from the context menu:

UI

Dark mode can be enabled persistently by selecting "File->Dark mode" in the main menu.

Several localizations are available and can be chosen in the UI:

IntelliJ IDEA plugin

There is a plugin for IntelliJ IDEA that can be installed via the plugin manager. The action in the "View menu" can be invoked when a Java, Groovy or Kotlin file is open in the editor.

The bytecode will be shown in the "jclasslib" tool window on the right hand side. Multiple class files can be open at the same time.

License

jclasslib bytecode editor is released under the GPL, Version 2.0.

Comments

Font size in `bytecode` tab is too small

As above, font size is so small that text is not readable (on screen with high pixel density such as mine). Maybe change default font size or add an option to adjust it yourself?

opened by kjarosh 9
Allow editing

It would be really awesome if jclasslib (actually the IJ plugin in my case) would allow editing of bytecode and then saving as class file like CafeBabe used to support.
feature

opened by Vampire 5
IDEA plugin doesn't handle class files opened directly

IDEA supports opening .class files directly (and decompiles them using Fernflower). The built-in bytecode viewer has no problem viewing the bytecode for such files.

However, attempting to view them using the jclasslib plugin results in an error dialog: "Class file could not be found: ". It would be really nice to be able to view those using jclasslib from within the IDE.

My use case is class files generated by a build task - they are not part of the project, nor do they have a corresponding source file in the project.

opened by Zastai 5
I can not use this plugin in my IDEA,what should I do?

I can download this plug-in, but my idea does not display restart. After I restart, there is no show related menu in the view. My idea version is version 2020. I downloaded version 2020 on the official website and put it in the local plugin folder, but it is still invalid. Are there other configuration solutions to enable my plug-in to start?

opened by CandyKIng1991 4
the newest IntelJ IDEA doesn't support the plugin

I found the plugin of jclasslib in JetBrain Plugin website.

https://plugins.jetbrains.com/plugin/9248-jclasslib-bytecode-viewer

but when I download the latest plugin, and install from disk, the IntelJ IDEA tell me that it doesn't support this plugin.

hope you can fix it ASAP, thanks for ur contribution.

opened by chenyurong 4
Startup Error

I am experiencing the following error directly at the startup:

I am using Oracle's JDK in version 1.8.0_111 on macOS 10.13.

Clicking "OK" results in closing jclasslib, just leaving the window open works fine but doesn't look nice :)

opened by FlorianLoch 3
Suggest to default open "General Information" in tab viewer after class file loaded

Previous version of jclasslib just has this behavior, which is very convenient to user, so suggest also add this feature to latest 5.0 version of jclasslib.

Thanks for this useful tool.

Regards, Tao

opened by iamzhout 3
IDEA 2022.1 error, How to solve it?

com.intellij.diagnostic.PluginException: Cannot load class org.gjt.jclasslib.idea.BytecodeToolWindowPanel ( error: org/gjt/jclasslib/browser/BrowserServices, classLoader=PluginClassLoader(plugin=PluginDescriptor(name=jclasslib Bytecode Viewer, id=jclasslib, descriptorPath=plugin.xml, path=D:\Program Files\JetBrains\Toolbox\apps\IDEA-U\ch-0\221.5080.210.plugins\idea-6.0.4.jar, version=6.0.4, package=null, isBundled=false), packagePrefix=null, instanceId=222, state=active) ) at com.intellij.ide.plugins.cl.PluginClassLoader.loadClassInsideSelf(PluginClassLoader.java:412) at com.intellij.ide.plugins.cl.PluginClassLoader.tryLoadingClass(PluginClassLoader.java:240) at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:212) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at org.gjt.jclasslib.idea.ToolWindowKt.showClassFile(ToolWindow.kt:65) at org.gjt.jclasslib.idea.ClassFileLocationKt$openClassFile$1.onSuccess(ClassFileLocation.kt:67) at com.intellij.openapi.progress.impl.CoreProgressManager.finishTask(CoreProgressManager.java:585) at com.intellij.openapi.progress.impl.ProgressManagerImpl.finishTask(ProgressManagerImpl.java:155) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressAsynchronously$6(CoreProgressManager.java:508) at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:215) at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:22) at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:197) at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873) at com.intellij.openapi.application.impl.ApplicationImpl$3.run(ApplicationImpl.java:511) at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:69) at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:112) at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:42) at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313) at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727) at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85) at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:898) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:746) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:439) at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:803) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:438) at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:106) at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:604) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:436) at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:484) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92) Caused by: java.lang.NoClassDefFoundError: org/gjt/jclasslib/browser/BrowserServices at java.base/java.lang.ClassLoader.defineClass2(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1109) at com.intellij.util.lang.UrlClassLoader.consumeClassData(UrlClassLoader.java:263) at com.intellij.util.lang.ZipResourceFile.findClass(ZipResourceFile.java:111) at com.intellij.util.lang.JarLoader.findClass(JarLoader.java:63) at com.intellij.util.lang.ClassPath.findClassInLoader(ClassPath.java:246) at com.intellij.util.lang.ClassPath.findClass(ClassPath.java:179) at com.intellij.ide.plugins.cl.PluginClassLoader.loadClassInsideSelf(PluginClassLoader.java:404) ... 39 more Caused by: java.lang.ClassNotFoundException: org.gjt.jclasslib.browser.BrowserServices PluginClassLoader(plugin=PluginDescriptor(name=jclasslib Bytecode Viewer, id=jclasslib, descriptorPath=plugin.xml, path=D:\Program Files\JetBrains\Toolbox\apps\IDEA-U\ch-0\221.5080.210.plugins\idea-6.0.4.jar, version=6.0.4, package=null, isBundled=false), packagePrefix=null, instanceId=222, state=active) at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:215) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ... 47 more

opened by zs66 2

com.intellij.diagnostic.PluginException

com.intellij.diagnostic.PluginException: Do not use toolWindow.setAvailable() as part of ToolWindowFactory.init().
Use ToolWindowFactory.shouldBeAvailable() instead. [Plugin: jclasslib]
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.registerToolWindow$intellij_platform_ide_impl(ToolWindowManagerImpl.kt:991)
	at com.intellij.toolWindow.ToolWindowSetInitializer.createAndLayoutToolWindows(ToolWindowSetInitializer.kt:188)
	at com.intellij.toolWindow.ToolWindowSetInitializer.access$createAndLayoutToolWindows(ToolWindowSetInitializer.kt:83)
	at com.intellij.toolWindow.ToolWindowSetInitializer$initUi$1.accept(ToolWindowSetInitializer.kt:147)
	at com.intellij.toolWindow.ToolWindowSetInitializer$initUi$1.accept(ToolWindowSetInitializer.kt:83)
	at java.base/java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:714)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
	at com.intellij.toolWindow.ToolWindowSetInitializer$initUi$2.execute(ToolWindowSetInitializer.kt:156)
	at java.base/java.util.concurrent.CompletableFuture.uniAcceptNow(CompletableFuture.java:750)
	at java.base/java.util.concurrent.CompletableFuture.uniAcceptStage(CompletableFuture.java:731)
	at java.base/java.util.concurrent.CompletableFuture.thenAcceptAsync(CompletableFuture.java:2117)
	at com.intellij.toolWindow.ToolWindowSetInitializer.initUi(ToolWindowSetInitializer.kt:141)
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.doInit(ToolWindowManagerImpl.kt:446)
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.init(ToolWindowManagerImpl.kt:419)
	at com.intellij.toolWindow.InitToolWindowSetActivity$runActivity$2.run(ToolWindowSetInitializer.kt:72)
	at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:215)
	at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:22)
	at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:197)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873)
	at com.intellij.openapi.application.impl.ApplicationImpl$3.run(ApplicationImpl.java:511)
	at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:69)
	at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:112)
	at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:42)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:898)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:746)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:439)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:803)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:438)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:106)
	at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:604)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:436)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:484)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)
Caused by: java.lang.IllegalStateException: Do not use toolWindow.setAvailable() as part of ToolWindowFactory.init().
Use ToolWindowFactory.shouldBeAvailable() instead.
	at com.intellij.openapi.wm.impl.ToolWindowImpl.setAvailable(ToolWindowImpl.kt:353)
	at com.intellij.ide.impl.ContentManagerWatcher.watchContentManager(ContentManagerWatcher.java:23)
	at org.gjt.jclasslib.idea.ByteCodeToolWindowFactory.createToolWindowContent(ToolWindow.kt:181)
	at com.intellij.openapi.wm.impl.ToolWindowImpl.createContentIfNeeded$intellij_platform_ide_impl(ToolWindowImpl.kt:528)
	at com.intellij.openapi.wm.impl.ToolWindowImpl.getContentManager(ToolWindowImpl.kt:404)
	at org.gjt.jclasslib.idea.ToolWindowKt.addInfoPanel(ToolWindow.kt:173)
	at org.gjt.jclasslib.idea.ToolWindowKt.access$addInfoPanel(ToolWindow.kt:1)
	at org.gjt.jclasslib.idea.ByteCodeToolWindowFactory.init(ToolWindow.kt:186)
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.registerToolWindow$intellij_platform_ide_impl(ToolWindowManagerImpl.kt:988)
	... 45 more

opened by qq517634644 2

IntelliJ IDEA 2022.1 EAP complaining

Every once in a while (haven't figured out what causes this exactly. However, it seems to have to do with switching projects and opening IntelliJ), IntelliJ shows this error:

com.intellij.diagnostic.PluginException: Do not use toolWindow.setAvailable() as part of ToolWindowFactory.init().
Use ToolWindowFactory.shouldBeAvailable() instead. [Plugin: jclasslib]
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.registerToolWindow$intellij_platform_ide_impl(ToolWindowManagerImpl.kt:991)
	at com.intellij.toolWindow.ToolWindowSetInitializer.createAndLayoutToolWindows(ToolWindowSetInitializer.kt:186)
	at com.intellij.toolWindow.ToolWindowSetInitializer.access$createAndLayoutToolWindows(ToolWindowSetInitializer.kt:83)
	at com.intellij.toolWindow.ToolWindowSetInitializer$initUi$1.accept(ToolWindowSetInitializer.kt:147)
	at com.intellij.toolWindow.ToolWindowSetInitializer$initUi$1.accept(ToolWindowSetInitializer.kt:83)
	at java.base/java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:714)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
	at com.intellij.toolWindow.ToolWindowSetInitializer$initUi$2.execute(ToolWindowSetInitializer.kt:154)
	at java.base/java.util.concurrent.CompletableFuture.uniAcceptNow(CompletableFuture.java:750)
	at java.base/java.util.concurrent.CompletableFuture.uniAcceptStage(CompletableFuture.java:731)
	at java.base/java.util.concurrent.CompletableFuture.thenAcceptAsync(CompletableFuture.java:2117)
	at com.intellij.toolWindow.ToolWindowSetInitializer.initUi(ToolWindowSetInitializer.kt:141)
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.doInit(ToolWindowManagerImpl.kt:446)
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.init(ToolWindowManagerImpl.kt:419)
	at com.intellij.toolWindow.InitToolWindowSetActivity$runActivity$2.run(ToolWindowSetInitializer.kt:72)
	at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:215)
	at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:22)
	at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:197)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873)
	at com.intellij.openapi.application.impl.ApplicationImpl$3.run(ApplicationImpl.java:511)
	at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:69)
	at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:112)
	at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:42)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:898)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:746)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:439)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:803)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:438)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:106)
	at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:604)
	at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:436)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:484)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)
Caused by: java.lang.IllegalStateException: Do not use toolWindow.setAvailable() as part of ToolWindowFactory.init().
Use ToolWindowFactory.shouldBeAvailable() instead.
	at com.intellij.openapi.wm.impl.ToolWindowImpl.setAvailable(ToolWindowImpl.kt:353)
	at com.intellij.ide.impl.ContentManagerWatcher.watchContentManager(ContentManagerWatcher.java:23)
	at org.gjt.jclasslib.idea.ByteCodeToolWindowFactory.createToolWindowContent(ToolWindow.kt:181)
	at com.intellij.openapi.wm.impl.ToolWindowImpl.createContentIfNeeded$intellij_platform_ide_impl(ToolWindowImpl.kt:528)
	at com.intellij.openapi.wm.impl.ToolWindowImpl.getContentManager(ToolWindowImpl.kt:404)
	at org.gjt.jclasslib.idea.ToolWindowKt.addInfoPanel(ToolWindow.kt:173)
	at org.gjt.jclasslib.idea.ToolWindowKt.access$addInfoPanel(ToolWindow.kt:1)
	at org.gjt.jclasslib.idea.ByteCodeToolWindowFactory.init(ToolWindow.kt:186)
	at com.intellij.openapi.wm.impl.ToolWindowManagerImpl.registerToolWindow$intellij_platform_ide_impl(ToolWindowManagerImpl.kt:988)
	... 45 more

opened by ThexXTURBOXx 2

disorderly code

How to set encoding of jclasslib？

operating system ：macOS Big Sur 11.2 java ：1.8.0_112 idea ：ULTIMATE 2019.3 jclasslib Bytecode Viewer plugin： file encode ：UTF-8 location ：china

opened by lakeslove 2
Const+

There have a way to add constants directly from a "notepad"? such as modifying methods you set up, it would be nice to have something similar, but setting each constant line by line, to add everything one by one for "big projects"

opened by Kaiox 0
Localizations wanted
Currently, jclasslib is localized into German, Simplified Chinese and Polish.

I'm looking for further localizations. If you are interested, please comment on this issue.

The localization process is as follows:

Copy the file Browser.properties to Browser_zh_CN.properties, with the appropriate locale code in the file name.

Translate all messages in the copied file. The following rules apply:

Placeholders like {0} must be preserved.

Directives in placeholders like {0,number,integer} must not be translated.

For choice formats like {0,choice,1#class was|1<classes were}, the numbers describe limits for the associated numerical placeholder and the text after the # characters must be translated to form grammatically correct sentences.

Messages starting with key. include technical terms that may not have to be fully translated.

Line break characters \n should be included in the same place and frequency in the translated message.

Messages that end with a colon : are located before a UI element. In the translation, add an appropriate character (or none) for all messages consistently.

Add an enum constant in the SupportedLocale class for the new locale.

Test by running the bytecode viewer run configuration in IntelliJ IDEA.

Send me a pull request

Thank you! :green_heart:
Help wanted
opened by ingokegel 4

Releases(6.0.4)

6.0.4(Dec 10, 2022)
New features

Show JVM spec for opcodes in Javadoc for Java 19

Support reading class files compiled by Java 19 and Java 20

Bug fixes

Fixed "class root not found" message in IntelliJ IDEA plugin

Source code(tar.gz)
Source code(zip)
jclasslib_linux_x64_6_0_4.tar.gz(55.47 MB)
jclasslib_macos_6_0_4.dmg(61.94 MB)
jclasslib_unix_6_0_4.tar.gz(6.49 MB)
jclasslib_win64_6_0_4.exe(54.49 MB)
6.0.3(Nov 21, 2021)
New features

Improved display of record attributes by displaying each record entry as a single node with nested attribute nodes

Support reading class files compiled by Java 18

Added a placeholder panel with instructions in the IDEA tool window

Bug fixes

Menu items with and without icons were not aligned on macOS

PermittedSubclassesAttribute and RecordAttribute were saved incorrectly and corrupted the class file

For Java 9+, the tree of JRE classes always showed the classes of the currently used JRE

Source code(tar.gz)
Source code(zip)
jclasslib_linux_x64_6_0_3.tar.gz(54.65 MB)
jclasslib_macos_6_0_3.dmg(60.95 MB)
jclasslib_unix_6_0_3.tar.gz(6.20 MB)
jclasslib_win64_6_0_3.exe(51.52 MB)
6.0.1(Jul 19, 2021)

Bug fixes

Updated translations with new messages in 6.0
Source code(tar.gz)
Source code(zip)
jclasslib_linux_x64_6_0_1.tar.gz(59.59 MB)
jclasslib_macos_6_0_1.dmg(62.78 MB)
jclasslib_unix_6_0_1.tar.gz(6.16 MB)
jclasslib_win64_6_0_1.exe(55.70 MB)
6.0(Jul 8, 2021)
New features

Editing functionality for constant pool, attributes and bytecode

You can edit constant pool entries:

Attribute values, like access flags:

Bytecode instructions can be edited from the context menu:

The opcode itself can be replaced with another compatible opcode:

The immediate values of instructions can be edited:

Attach mode: Connect to any locally running JVM and view and edit its loaded classes

By setting -Djclasslib.locale=en (or another supported locale), the displayed language can be changed regardless of the default locale. In this way, the language can be overridden in the IDEA plugin

Links to JVM spec now show the document for Java 16 instead of Java 8

Bug fixes

Explicit language selection was broken in 5.8

UI fixes and improvements

Fixed error when writing the NestMembers attribute

Source code(tar.gz)
Source code(zip)
jclasslib_linux_x64_6_0.tar.gz(59.59 MB)
jclasslib_macos_6_0.dmg(62.78 MB)
jclasslib_unix_6_0.tar.gz(6.16 MB)
jclasslib_win64_6_0.exe(55.69 MB)
5.8(Feb 22, 2021)
New features

Runs natively on macOS ARM (Apple Silicon)

Linux x64 archive with a bundled JetBrains Runtime that works with fractional HiDPI

Polish translation

Automatic detection of dark mode

Support for reading class files up to Java 17

Source code(tar.gz)
Source code(zip)
jclasslib_linux_x64_5_8.tar.gz(57.51 MB)
jclasslib_macos_5_8.dmg(61.02 MB)
jclasslib_unix_5_8.tar.gz(5.42 MB)
jclasslib_win64_5_8.exe(53.74 MB)
5.7(Oct 12, 2020)
New features

Value labels and hyperlinks can be focused and text in value labels can be selected

Support the Record class file attribute new in Java 14

Support the PermittedSubclasses class file attribute new in Java 15

Bug fixes

Installer was not localized in Simplified Chinese

Checkbox and radio button menu items did not have the correct icon in the selected state

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_7.dmg(53.72 MB)
jclasslib_unix_5_7.tar.gz(5.31 MB)
jclasslib_win64_5_7.exe(51.04 MB)
5.6(Jul 22, 2020)
New features

Localizations for Simplified Chinese (thanks to enihsyou) and German. The UI is now internationalized, please feel free to submit your translation to another language (see https://github.com/ingokegel/jclasslib/issues/36).

Language detection is automatic by default but can be switched in the UI

Native alerts and file choosers

HiDPI icons

Bug fixes

Unattended installations and console installations were disabled

Classes that were opened by dragging files to the window had a leading slash in the title of their tab

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_6.dmg(51.97 MB)
jclasslib_unix_5_6.tar.gz(5.16 MB)
jclasslib_win64_5_6.exe(55.03 MB)
5.5.1(Mar 24, 2020)

New features

Added class file versions for Java 14 and Java 15
Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_5_1.dmg(51.65 MB)
jclasslib_unix_5_5_1.tar.gz(4.93 MB)
jclasslib_win64_5_5_1.exe(51.12 MB)
5.5(Jan 26, 2020)
New features

Switched the look and feel to FlatLaf for a more modern appearance and better HiDPI support

Added a dark mode that can be activated persistently by selecting "File->Dark mode" in the main menu

Bug fixes

Constant pool and class member nodes in the class file structure tree were expanded when selected

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_5.dmg(51.49 MB)
jclasslib_unix_5_5.tar.gz(4.79 MB)
jclasslib_win64_5_5.exe(51.07 MB)
5.4(Sep 24, 2019)
New features

Support NestHost and NestMembers attributes new in Java 11+

IDEA plugin: Improved method for finding class files, decompiled classes and Scala classes can now be shown

HiDPI on Windows is supported

Windows and macOS media files are now bundled with a JRE (as of 5.4 Java 13)

macOS DMG is now notarized

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_4.dmg(50.63 MB)
jclasslib_unix_5_4.tar.gz(3.94 MB)
jclasslib_win64_5_4.exe(50.85 MB)
5.3.2(Jun 3, 2019)
New features

Added the ability to read truncated class files

Support class file version numbers for JDK 12 and 13

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_3_2.dmg(4.00 MB)
jclasslib_unix_5_3_2.tar.gz(3.76 MB)
jclasslib_win64_5_3_2.exe(2.10 MB)
5.3.1(Dec 27, 2018)
Bug fixes

Table row heights were too small in the IDEA plugin

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_3_1.dmg(3.88 MB)
jclasslib_unix_5_3_1.tar.gz(3.59 MB)
jclasslib_win32_5_3_1.exe(1.95 MB)
jclasslib_win64_5_3_1.exe(2.05 MB)
5.3(Jun 18, 2018)
New Features

Support for reading class files with major versions 54 and 55 (Java 10 and 11)

Support for dynamic class file constants in Java 11

Added a "Save all open classes" action to the menu. This is useful for extracting class files from Java 9+ JDKs.

Bug fixes

Fixed exception when running the GUI from the IDE with Java 9

After adding a classpath entry in the classpath browser, the browser was empty.

When showing the classpath browser, the tree was re-scanned even if the classpath was unchanged

Fixed Java 9 warning for illegal reflective access when debug mode is enabled

Fixed wrong attribute length when writing ModuleTargetAttribute

Branch instructions were marked as invalid in code attributes if switch instructions were present in between the branch instruction and the target instruction

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_3.dmg(3.62 MB)
jclasslib_unix_5_3.tar.gz(3.34 MB)
jclasslib_win32_5_3.exe(1.89 MB)
jclasslib_win64_5_3.exe(1.99 MB)
5.2.1(Nov 2, 2017)

Bug fixes

Support running with Java 9 on macOS
Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_2_1.dmg(3.45 MB)
jclasslib_unix_5_2_1.tar.gz(3.17 MB)
jclasslib_win32_5_2_1.exe(2.00 MB)
jclasslib_win64_5_2_1.exe(2.09 MB)
5.2(Jul 10, 2017)
New features

The class browser now has a module path and a class path tab

Support for CONSTANT_Module_Info and CONSTANT_Package_info structures in Java 9 class files

Support for all new class file attributes that occur in the Java 9 module-info.class file: ModulePackages, ModuleMainClass, ModuleTarget, ModuleHashes and ModuleResolution.

Bug fixes

Could not use relative path names as arguments for invoking jclasslib

Data for unknown attributes was not written

Auto-resize in table attribute details panels was broken (regression in 5.0)

Class path browser was not updated after changing the JRE home directory in the class path setup dialog

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_2.dmg(3.40 MB)
jclasslib_unix_5_2.tar.gz(3.12 MB)
jclasslib_win32_5_2.exe(1.98 MB)
jclasslib_win64_5_2.exe(2.08 MB)
5.1(Feb 4, 2017)
Major changes

Added a plugin for IntelliJ IDEA that can be installed via the plugin manager. The action in the "View menu" can be invoked when a Java, Groovy or Kotlin file is open in the editor.

The bytecode will be shown in the "jclasslib" tool window on the right hand side. Multiple class files can be open at the same time.

Other changes

Added support for the SourceDebugExtension class file attribute

When opening a class file, select the "General Information" node

Bug fixes

Reload class file action did not work (regression in 5.0)

LocalVariableTable attribute: "Length" column always displayed "10" (Regression in 5.0)

System property jclasslib.io.skipAttributes did not work anymore (Regression in 5.0)

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_1.dmg(3.02 MB)
jclasslib_unix_5_1.tar.gz(2.78 MB)
jclasslib_win32_5_1.exe(3.05 MB)
jclasslib_win64_5_1.exe(3.14 MB)
5.0(Jun 13, 2016)
Major changes

jclasslib's code base has been converted to the Kotlin programming language. Parts of the code base have been rewritten to better fit with Kotlin's programming paradigms. If used as a library, all classes continue to be usable from Java. However, many classes have been renamed and restructured.

The jclasslib UI now uses draggable tabs instead of the outdated internal frames in previous versions, a window can be split horizontally, vertically or in a 4-way split

Multiple top-level windows with separate class path configurations are now supported

Browsing classes in the runtime library of Java 9 JREs is now supported

Drag and drop of class files and JAR files into a jclasslib window is now supported

Filtering for the constant pool

Other changes

Inline links to the JVM spec in the bytecode display

Selectable text in the bytecode display

When reloading a class file, the current selection is always retained

Deployment changes

Java 8 is now required to run the jclasslib UI

Signed Windows installer and signed DMG for Mac OS X

Source code(tar.gz)
Source code(zip)
jclasslib_macos_5_0.dmg(3.08 MB)
jclasslib_unix_5_0.tar.gz(2.85 MB)
jclasslib_win32_5_0.exe(3.02 MB)
jclasslib_win64_5_0.exe(3.11 MB)
4.3.1(Jan 10, 2016)

Bug fixes

Regression: NOP opcodes broke the bytecode display
Source code(tar.gz)
Source code(zip)
4.3(Jan 10, 2016)
Features

Improved display of CONSTANT_InvokeDynamic_info, now links into BootstrapMethods attribute

Improved display of BootstrapMethods attribute, now displays single table with all attributes

Source code(tar.gz)
Source code(zip)
4.2(Jan 10, 2016)

Features

Support for runtime type annotations. All Java 8 class file attributes are now displayed.

Bug fixes

When an opening a class file did not succeed, the internal frame was in an undefined state
Source code(tar.gz)
Source code(zip)
4.1(Jan 10, 2016)

Features

New attributes: StackMapTable, BootstrapMethods, MethodParameters, RuntimeParameterAnnotations

Bug fixes

Writing was broken for certain attributes containing annotations
Source code(tar.gz)
Source code(zip)
4.0(Jan 10, 2016)
Features

Support for Java 8 (class files compiled with -target 1.8)

Show major class file version as verbose text in the "General information"

Added display for CONSTANT_MethodHandle_info and CONSTANT_MethodType_info constant pool entries

File extension handling for .class and .jcw files

Dragging .class and .jcw files into the main window will open them

Code base was changed to use Java language features up to Java 6. Opcodes and access flags are now implemented as enums instead of interfaces. This has caused some incompatible changes to the API.

Bug fixes

The iinc instruction was read incorrectly for negative arguments

The CONSTANT_InvokeDynamic_info constant pool entry was missing

Source code(tar.gz)
Source code(zip)
3.1(Jan 10, 2016)
Features

Support for Java 7 (class files compiled with -target 1.7)

Windows 7 compatible installers and launchers

The detail panels for "Fields" and "Methods" now have "Copy to clipboard" buttons to copy all signatures to the system clipboard

At the bottom of the bytecode display there is now a drop-down list with all used opcodes and a button to show the corresponding official documentation in the Java language specification

Offsets are now verified and invalid branch instructions are tagged in the bytecode display

Bug fixes

Wide branch instructions were not displayed correctly in the bytecode

Negative values of bipush instruction were printed as 256-value

Source code(tar.gz)
Source code(zip)