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I want to read a .class file that is located inside of a .jar package. How can I read a readable .class file from a .jar package?
My environment is:
Java
Java 1.8.0_73
Java(TM) SE Runtime Environment (build 1.8.0_73-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.73-b02, mixed mode)
Windows 10 Home (64-bit) [build 10586]
EDIT:
My extracted .class file that contains binary & compiled bytecode:
The output I want:
806
Using the unzip Command The unzip command is a commonly used utility for working with ZIP files from the Linux command-line. Thanks to the unzip command, we can view the content of a JAR file without the JDK. The output above is pretty clear. It lists the files in the JAR file in a tabular format.
Using javap The Java command-line comes with the javap tool that displays information about the fields, constructors, and methods of a class file. Based on the options used, it can disassemble a class and show the instructions that comprise the Java bytecode.
Use a decompiler. I prefer using Fernflower, or if you use IntelliJ IDEA, simply open .class files from there, because it has Fernflower pre-installed.
Or, go to javadecompilers.com, upload your .jar file, use CFR and download the decompiled .zip file.
However, in some cases, decompiling code is quite illegal, so, prefer to learn instead of decompiling.
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