(A very useful Java decompiler tool. The operation is simple, no installation is required, and multiple .class files in the same main directory are automatically opened. Tested under XP. (Note) Defect: Only the content of class files can be detected, and cannot be decompiled into java files.
jd-gui-0.3.3.windows\jd-gui.cfg
jd-gui-0.3.3.windows\jd-gui.exe
jd-gui-0.3.3.windows\readme.txt
.....)