gnu.bytecode
Class dump

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          java.io.DataInputStream
              gnu.bytecode.ClassFileInput
                  gnu.bytecode.dump

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput

public class dump
extends ClassFileInput

Class to read a ClassType from a DataInputStream (.class file). To print out the contents of a class file foo.class, you can use the class dump as an application:

 java gnu.bytecode.dump foo.class
 

This will print out the constant pool, fields, methods, superclass, and implemented interfaces of class foo. It is useful for printing out more detailed information than javap does.

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

dump(java.io.InputStream str)

Method Summary

static void	main(java.lang.String[] args) Reads a .class file, and prints out the contents to System.out.
void	printAttributes()
Attribute	readAttribute(java.lang.String name, int length, AttrContainer container)
ConstantPool	readConstants()
static void	usage()

Methods inherited from class gnu.bytecode.ClassFileInput

readAttributes, readClassInfo, readClassType, readFields, readHeader, readMethods, skipAttribute

Methods inherited from class java.io.DataInputStream

read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, readUTF, skipBytes

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

dump

public dump(java.io.InputStream str)
     throws java.io.IOException,
            java.lang.ClassFormatError

Throws:

java.io.IOException

java.lang.ClassFormatError

Method Detail

readConstants

public ConstantPool readConstants()
                           throws java.io.IOException

Overrides:

readConstants in class ClassFileInput

Throws:

java.io.IOException

readAttribute

public Attribute readAttribute(java.lang.String name,
                               int length,
                               AttrContainer container)
                        throws java.io.IOException

Overrides:

readAttribute in class ClassFileInput

Throws:

java.io.IOException

printAttributes

public void printAttributes()

main

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

Reads a .class file, and prints out the contents to System.out. Very rudimentary - prints out the constant pool, and field and method names and types, but only minimal attributes (i.e. no dis-assembly yet).

Parameters:

args - One argument - the name of a .class file.

usage

public static void usage()