英文:
How can I tell why/how two class files are different?
问题
我正在尝试重新创建一些旧的源代码。我有两个类，一个来自我的新源代码，一个来自丢失的源代码。这两个类都将反编译为相同的源代码。然而，对这些类进行比特级别的比较仍然显示出差异。如何确定是什么导致了这些差异？
GC_
英文:
I am trying to recreate some old source. I have two classes, one from my new source and one from the lost source. The both classes will decompile to identical source. However, a bit level compare of the classes still shows differences. How do tell what causes these differences?
GC_
答案1
得分: 1
如果你想找出两个类文件之间的区别，我建议使用Krakatau反汇编器的-roundtrip模式。这将把类文件转换成一个可读的文本格式，仍然一一映射到类文件的精确二进制编码。然后，你可以比较生成的文本文件，以查看其中的差异。
英文:
If you want to find out what is different between the two classfiles, I'd recommend using the Krakatau disassembler in -roundtrip mode. This will convert the classfiles to a human readable text format that still maps 1:1 to the exact binary encoding of the classfile. Then you can diff the resulting text files to see what is different.
答案2
得分: 0
我发现只使用javap非常有帮助。
我对两个类都运行了这个命令：
javap -version -l -v -p -c -s -sysinfo ClassName.class > temp.txt
然后我比较了这两个文件。这揭示了我要找的差异。这是一种行号的问题。我也发现eclipse的反编译器很有帮助。
英文:
I found just using javap to be very helpful.
I ran this command for both classes:
javap -version -l -v -p -c -s -sysinfo ClassName.class > temp.txt
Then I compared the two files. This uncovered the difference I was looking for. It was a line number thing. I found eclipse's decompiler helpful, too.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论