Java comes with an disassembly tool JAVAP (Disassembler)

In the cmd input JAVAP display, if your computer's Java environment to be configured well

Usage: javap <options> <classes> where,  possible options include:   -help  --help   -?         output this usage message   -version                   Version Information   -v   -verbose              Output Additional Information    -l                         output line number and local variable table   -public                    Show only public classes and members   -protected                 Show protected/public classes and Members   -package                   Show Packages/ protected/public class &NBSP;&NBSP;&NBSP;&Nbsp;                         and members   (default)   -p  -private               Show all classes and members   -c                         Disassemble the Code   -s                         output Internal type signature   -sysinfo                   shows the     of the class being processed                           System Information   (path,  size,  date, md5  hash)   -constants                 display static final constants   -classpath <path>          specifies where to find the user class file   -cp <path>                 specifies where to find the user class file   -bootclasspath  <path>     overwrite the location of the boot class file

Usage is like this, do not know how to use, you can leave a message

Attach a picture, about the use of-V to see

Java comes with an disassembly tool JAVAP (Disassembler)