Fernflower and IntelliJ IDEA's java-decompiler

java intellij-idea decompiler
Tianxiang Xiong picture Tianxiang Xiong · Oct 5, 2016 · Viewed 23.4k times · Source

I'm trying to figure out how to use the Fernflower Java decompiler.

I can find java-decompiler.jar at the following location:

~/idea-IC-162.1628.40/plugins/java-decompiler/lib/java-decompiler.jar

There is no fernflower.jar, however. I assume this is because the functionality has been folded into java-compiler.jar, and the Fernflower README has simply not been updated in 2 years.

When I run the following, however:

java -jar ~/idea-IC-162.1628.40/plugins/java-decompiler/lib/java-decompiler.jar myclassfile.class .

I get

no main manifest attribute, in /home//idea-IC-162.1628.40/plugins/java-decompiler/lib/java-decompiler.jar

Has IntelliJ stopped supporting command-line based decompilation, or am I missing something here?

Answer

qwazer picture qwazer · Oct 5, 2016

Try to invoke main class org.jetbrains.java.decompiler.main.decompiler.ConsoleDecompiler manually

java -cp java-decompiler.jar org.jetbrains.java.decompiler.main.decompiler.ConsoleDecompiler myclassfile.class .

Also you can find more about internal usage of Fernflower inside IDEA by query in source code https://github.com/JetBrains/intellij-community/search?utf8=%E2%9C%93&q=Fernflower

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