How to use java decompilation tool

There are many decompilation tools to choose from, some of the more popular ones include JD-GUI, Procyon, Jadx, etc. For example, how to use JD-GUI: 1. Download and install JD-GUI: Go to the official website of JD-GUI to download the latest version of JD-GUI; 2. Run JD-GUI: use "java -jar jd-gui-x.y.z.jar " command to run JD-GUI; 3. Open the Java bytecode file; 4. View the decompiled Java source code.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Java decompilation tools are usually used to decompile Java bytecode files into readable Java source code. There are many decompilation tools to choose from, some of the more popular ones include JD-GUI, Procyon, Jadx, etc. The following are simple steps to use JD-GUI:

1. Download and install JD-GUI:

Go to the official website of JD-GUI (https://github .com/java-decompiler/jd-gui/releases) to download the latest version of JD-GUI. Depending on your operating system, select the appropriate installation package (usually a JAR file).

2. Run JD-GUI:

Use the command line or double-click the JAR file to run JD-GUI. If it is a command line, you can use the following command:

java -jar jd-gui-x.y.z.jar

where x.y.z is the version number, replace it with the actual version number according to the downloaded file name.

3. Open the Java bytecode file:

Use the JD-GUI interface, click "File" -> "Open", and then select what you want to decompile A Java bytecode file (usually a file ending with .class).

4. View the decompiled Java source code:

JD-GUI will try to decompile the selected bytecode file and compile it in a format similar to the Java source code The form of the code is displayed on the interface. You can view classes, methods, and other structures in the JD-GUI window.

Please note that since decompilation is a reverse engineering operation, in some cases the original source code cannot be completely restored. In addition, when using decompilation tools, make sure you have the right to perform relevant reverse engineering operations to avoid violating legal regulations.

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