Class listclass

java.lang.Object
  |
  +--listclass

public class listclass

extends java.lang.Object

Read class file(s) and display its contents. The command line usage is:

java listclass [-constants] [-code] [-brief] [-dependencies] [-nocontents] [-recurse] class... [-exclude ]

where

• -code List byte code of methods
• -brief List byte codes briefly
• -constants Print constants table (constant pool)
• -recurse Usually intended to be used along with -dependencies When this flag is set, listclass will also print information about all classes which the target class depends on.
• -dependencies Setting this flag makes listclass print a list of all classes which the target class depends on. Generated from getting all CONSTANT_Class constants from the constant pool.
• -exclude All non-flag arguments after this flag are added to an 'exclusion list'. Target classes are compared with the members of the exclusion list. Any target class whose fully qualified name begins with a name in the exclusion list will not be analyzed/listed. This is meant primarily when using both -recurse to exclude java, javax, and sun classes, and is recommended as otherwise the output from -recurse gets quite long and most of it is not interesting. Note that -exclude prevents listing of classes, it does not prevent class names from being printed in the -dependencies list.
• -nocontents Do not print JavaClass.toString() for the class. I added this because sometimes I'm only interested in dependency information.

Here's a couple examples of how I typically use listclass:

java listclass -code MyClass

Print information about the class and the byte code of the methods

java listclass -nocontents -dependencies MyClass

Print a list of all classes which MyClass depends on.

java listclass -nocontents -recurse MyClass -exclude java. javax. sun.

Print a recursive listing of all classes which MyClass depends on. Do not analyze classes beginning with "java.", "javax.", or "sun.".

java listclass -nocontents -dependencies -recurse MyClass -exclude java.javax. sun.

Print a recursive listing of dependency information for MyClass and its dependents. Do not analyze classes beginning with "java.", "javax.", or "sun."

Version:

$Id: listclass.java,v 1.8 2001/10/11 11:59:26 dahm Exp $

Author:

M. Dahm, Thomas Wheeler

Constructor Summary

listclass(boolean code, boolean constants, boolean verbose, boolean classdep, boolean nocontents, boolean recurse, java.util.Vector exclude_name)

Method Summary

static java.lang.String[]	getClassDependencies(ConstantPool pool)
void	list(java.lang.String name) Print the given class on screen
static void	main(java.lang.String[] argv)
static void	printClassDependencies(ConstantPool pool) Dump the list of classes this class is dependent on
static void	printCode(Method[] methods, boolean verbose) Dump the disassembled code of all methods in the class.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

listclass

public listclass(boolean code,
                 boolean constants,
                 boolean verbose,
                 boolean classdep,
                 boolean nocontents,
                 boolean recurse,
                 java.util.Vector exclude_name)

Method Detail

main

public static void main(java.lang.String[] argv)

list

public void list(java.lang.String name)

Print the given class on screen

printClassDependencies

public static void printClassDependencies(ConstantPool pool)

Dump the list of classes this class is dependent on

getClassDependencies

public static java.lang.String[] getClassDependencies(ConstantPool pool)

printCode

public static void printCode(Method[] methods,
                             boolean verbose)

Dump the disassembled code of all methods in the class.