How do I decompile my Scala code?

14.6. Disassembling and Decompiling Scala Code

1. Use the javap command to disassemble a . class file to look at its signature.
2. Use scalac options to see how the compiler converts your Scala source code to Java code.
3. Use a decompiler to convert your class files back to Java source code.

Can Scala use Java libraries?

Scala is designed to work smoothly with Java and Java libraries like JMSL. This is clearly evident in how Scala picks up the same CLASSPATH environment variable Java uses, so if the Java library you wish to use is already there in the CLASSPATH, then you’re good to go.

How do you decompile a Scala jar?

Solution

1. Use the javap command to disassemble a . class file to look at its signature.
2. Use scalac options to see how the compiler converts your Scala source code to Java code.
3. Use a decompiler to convert your class files back to Java source code.

Can I use Java and Scala in same project?

Q. Can I use Scala and Java in the same project? Sure, you can. You can use most of the JVM based languages together in the same project.

What is Javap?

DESCRIPTION. The javap command disassembles one or more class files. Its output depends on the options used. If no options are used, javap prints out the package, protected, and public fields and methods of the classes passed to it. javap prints its output to stdout.

How do I decompile a jar file in IntelliJ?

UPDATE

1. Locate the file in ${IntelliJ_INSTALL_DIR}\plugins\java-decompiler\lib\java-decompiler. jar (example: C:\Program Files\JetBrains\IntelliJ IDEA 2018\plugins\java-decompiler\lib).
2. Copy it somewhere and rename to fernflower. jar (optional).
3. This JAR is not executable, so we can’t run it using java -jar .

Can we get source code from jar file?

Steps to get sources of a jar file as a zip : Drag and drop the jar for which you want the sources on the JAD. 3 JAD UI will open with all the package structure in a tree format. Click on File menu and select save jar sources. It will save the sources as a zip with the same name as the jar.

How do I convert a .class file to Java?

JAD Decompiler

1. Example.
2. Step 1: Download JAD tool from https://bit.ly/2XuRzT5.
3. Step 2: Extract the zip file and get jad.exe.
4. Step 3: Create a . java file (DecompilerDemo.
5. Step 4: Compile and run the . java file.
6. Step 5: Now move the .
7. Step 6: Type the command: jad DecompilerDemo.
8. Step 7: Type the command: jad?

How to convert Java code to Scala code?

You need to open a project with your Java sources. You can then copy/paste expressions, methods, or entire classes in to a .scala file. This converts to equivalent Scala code. The fidelity of conversion isn’t perfect, and, for this reason, it doesn’t support a bulk conversion yet.

How does Jad work in Scala?

Running jad on the first Scala source code file I showed above (the simple “class Main” definition) results in the following Java source code: As you can see, jad brings your Java class files all the way back to Java source code.

What is the use of apply method in Scala?

Scala case classes automatically create an apply method, which lets you skip the use of the “new” keyword when creating a new object reference. Had I included any fields in my class file definition, I would have expected to see getter and setter methods for those fields.

Can I compile a Scala trait in Java?

Compiling any trait creates a Java interface of the same name. This interface is usable as a Java type, and it lets you call methods on Scala objects through variables of that type. Implementing a trait in Java is another story. In the general case it is not practical.