We’ve all been there. You inherit a legacy project with no source code, a critical dependency throws an unexplainable error, or a vendor goes out of business taking their documentation with you.
public class UserService private String apiKey = "secret"; public String greetUser(String name) name.isBlank()) return "Hello, Guest!"; return "Hello, " + name.trim() + "!"; decompile java class file
// Original public void process(int userId, String userName) ... // Decompiled (without debug symbols) public void process(int n, String s) ... Here’s a practical script to decompile a whole JAR using CFR: We’ve all been there
public class UserService private String apiKey = "secret"; public String greetUser(String name) if (name == null " + name.trim() + "!"