ext.tools

Class JWhich

Object

JWhich

All Implemented Interfaces:

RemoteAccess

public class JWhich
extends Object
implements RemoteAccess

JWhich is a utility that takes a Java class name and displays the absolute pathname of the class file that would be loaded first by the class loader, as prescribed by the class path.

JWhich also validates the class path and reports any non-existent or invalid class path entries.

Usage is similar to the UNIX which command.

Example uses:

To find the absolute pathname of MyClass.class not in a package:

java JWhich MyClass

To find the absolute pathname of MyClass.class in the my.package package:

java JWhich my.package.MyClass

Author:

Mike Clark, Clarkware Consulting, Inc.

Field Summary

Fields inherited from interface RemoteAccess

versionID

Constructor Summary

Constructors

Constructor and Description
JWhich()

Method Summary

Methods

Modifier and Type	Method and Description
static URL	findClass(String className) Returns the URL of the resource denoted by the specified class name, as prescribed by the class path.
static void	main(String[] args)
static String	msWhich(String className)
static void	printClasspath()
static void	setClasspath(String classpath)
static void	validate() Validates the class path and reports any non-existent or invalid class path entries.
static String	which(String className) Prints the absolute pathname of the class file containing the specified class name, as prescribed by the class path.

Methods inherited from class Object

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

Constructor Detail

JWhich

public JWhich()

Method Detail

which

public static String which(String className)

Prints the absolute pathname of the class file containing the specified class name, as prescribed by the class path.

Parameters:

className - Name of the class.

msWhich

public static String msWhich(String className)
                      throws Exception

Throws:

Exception

findClass

public static URL findClass(String className)

Returns the URL of the resource denoted by the specified class name, as prescribed by the class path.

Parameters:

className - Name of the class.

Returns:

Class URL, or null of the class was not found.

validate

public static void validate()

Validates the class path and reports any non-existent or invalid class path entries.

Valid class path entries include directories, .zip files, and .jar files.

printClasspath

public static void printClasspath()

setClasspath

public static void setClasspath(String classpath)

main

public static void main(String[] args)