I'm myeclipse5.5IDE Tools. In order to be able to decompile the class file, the Internet searched a lot of information, finally found a piece of information:1. Copy the Jad.exe to the jre/of the MyEclipse installation directoryBin directory, such as: C:/program Files/myeclipse5.5.1ga/jre/bin/Jad.exe;2. then the net.sf.jadclipse_3.2.4The. Jar is copied to the eclipse/in the MyEclipse installation directoryplugins directory, such as: C:/program Files/myeclipse5.5.1Ga/eclipse/plugins/net.sf.jadclipse_3.2.4. Jar3. In the MyEclipse window, select window->preferences->java->jadclipsedirectory forTemporary files: The path to the MyEclipse installation directory jre/bin, such as: C:/Program Files/myeclipse5.5.1Ga/jre/bin, choose OK! Myeclipse7.0m1jad is a Java anti-compilation tool that executes on the command line, and the source files that are deserialized are highly readable. Unfortunately it is not very convenient to use. Fortunately find the plug-in under Eclipse, called Jadclipse, after installation, as long as double-click the. class file, you can directly see the source file, including the jar package of the class file, can also be directly decompile. 1. Download Jad1.5. 8ghttp://Www.kpdus.com/jad.html#downloadUnzip after download. After decompression, copy the Jad.exe to the bin directory of the JRE, such as C:/Program Files/java/jre1.6.0/bin2. Download Jadclipse_3.3. Jarhttp://Jaist.dl.sourceforge.net/sourceforge/jadclipse/net.sf.jadclipse_3.3.0.jarWill jadclipse_3.1.0. jar Copy to C:/Program Files/myeclipse7.0m1/eclipse/Plugins directory (using the link method to install the plugin). 3After you start eclipse, in the windows-->perference-->There should be more than one jadclipse directory in Java, the relevant settings can be modified in this configuration jadclipse: set path to Decompiler as Jad.exe full path, such as: C:/program Files/java/jre1.6.0/bin/jad.exe, in directory forTemporary files specify the path to the temporary file, such as: C:/Program Files/myeclipse7.0m1/Temp4, modify "*" in Eclipse's windows-->perference-->general->editors->file associations.class"The default associated editor is" Jadclipse Class File Viewer "5, install complete, double-click the class file, eclipse will automatically decompile.