NAME¶

procyon - manual page for the Procyon Java decompiler

SYNOPSIS¶

procyon [ options] <type names or class/jar files>

DESCRIPTION¶

Procyon is a Java decompiler handling language enhancements from Java 5 and beyond that most other decompilers don't. It also excels in areas where others fall short. Procyon in particular does well with:
* Enum declarations
* Enum and String switch statements
* Local classes (both anonymous and named)
* Annotations
* Java 8 Lambdas and method references Procyon offers three output modes:
* Java (default)
* Raw Bytecode (similar to javap, but prettier; run with -r)
* Bytecode AST (an intermediate representation; run with -b, add -u for unoptimized) One or more types can be passed as an argument to be processed. The input types can be fully-qualified names in dotted or binary form (e.g., java.lang.String or java/lang/String) or relative/absolute file paths ( path/to/MyClass.class) or even whole jar files. If a type name is passed, Procyon will attempt to load it out of the user or bootstrap classpath.

OPTIONS¶

Output Bytecode AST instead of Java. Default: false

Collapse multiple imports from the same package into a single wildcard import. Default: false

Includes the constant pool when displaying raw bytecode (unnecessary with -v). Default: false

For debugging, show Java line numbers as inline comments (implies -ln; requires -o). Default: false

Disable 'for each' loop transforms. Default: false

Enable eager loading of method bodies (may speed up decompilation of larger archives). Default: false

Exclude nested types when decompiling their enclosing types. Default: false

[DEPRECATED] Explicit imports are now enabled by default. This option will be removed in a future release. Default: false

Always print type arguments to generic methods. Default: false

Drop the braces statements around switch sections when possible. Default: false

Display this usage information and exit. Default: false

[DEPRECATED] Decompile all classes in the specified jar file (disables -ent and -s).

Use a color scheme designed for consoles with light background colors. Default: false

Includes the local variable tables when displaying raw bytecode (unnecessary with -v). Default: false

Set the level of log verbosity (0-3). Level 0 disables logging. Default: 0

Attempt to merge as many variables as possible. This may lead to fewer declarations, but at the expense of inlining and useful naming. This feature is experimental and may be removed or become the standard behavior in future releases. Default: false

Write decompiled results to specified directory instead of the console.

Output Raw Bytecode instead of Java (to control the level of detail, see: -cp, -lv, -ta, -v). Default: false

Do not remove redundant explicit casts. Default: false

Do not lift the contents of switches having only a default label. Default: false

Show synthetic (compiler-generated) members. Default: false

Simplify type-qualified member references in Java output [EXPERIMENTAL]. Default: false

Stretch Java lines to match original line numbers (only in combination with -o) [EXPERIMENTAL]. Default: false

Includes type attributes when displaying raw bytecode (unnecessary with -v). Default: false

Enable Unicode output (printable non-ASCII characters will not be escaped). Default: false

Show unoptimized code (only in combination with -b). Default: false

Includes more detailed output depending on the output language (currently only supported for raw bytecode). Default: false

Display the decompiler version and exit. Default: false

Include line numbers in raw bytecode mode; supports Java mode with -o only. Default: false

EXAMPLES¶

Decompile a single class to the console:

$ procyon java.lang.String

$ procyon java.util.Collections

Decompile a whole jar to a directory:

$ procyon myJar.jar -o out

Decompile a single class from a jar:

$ CLASSPATH=myJar.jar procyon com.example.Foo

SEE ALSO¶

https://bitbucket.org/mstrobel/procyon/wiki/Java%20Decompiler