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finding classpath visible to classloader

4 replies on 1 page. Most recent reply: Apr 19, 2002 11:17 PM by Kishori Sharan

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Anand

Posts: 5
Nickname: anand
Registered: Mar, 2002

finding classpath visible to classloader Posted: Apr 19, 2002 1:43 PM
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Hi,
Is it possible to findout classpath visible to a classloader for a particuler class at runtime.
Thanks
Anand


Kishori Sharan

Posts: 211
Nickname: kishori
Registered: Feb, 2002

Re: finding classpath visible to classloader Posted: Apr 19, 2002 2:05 PM
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Try getResource () method of Class class. something like this:

URL url = this.getClass().getResource ( "MyClass.class" ) ;

getResource () uses CLASSPATH to find the class file and this is how you can get the classpath being used for MyClass. However, implementation of JVM is free to choose any criteria other than classpath to find the resourse.

Thanks
Kishori

Anand

Posts: 5
Nickname: anand
Registered: Mar, 2002

Re: finding classpath visible to classloader Posted: Apr 19, 2002 2:24 PM
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will it give all the classpaths or class path for that class. If no then please let me know how to find all the class paths.
Thanks a lot
Anand

Jay Kandy

Posts: 77
Nickname: jay
Registered: Mar, 2002

Re: finding classpath visible to classloader Posted: Apr 19, 2002 3:42 PM
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Like Kishori said, getResource() gives the location (in other words classpath) to the resource passed as parameter.

Normally, (the keyword being normally) JVMs load classes in a platform-dependent manner. Most use the environment variable of the underlying platform: CLASSPATH. This maps to the system property java.class.path. So, to get the classpath used by a ClassLoader use that system property.

Kishori Sharan

Posts: 211
Nickname: kishori
Registered: Feb, 2002

Re: finding classpath visible to classloader Posted: Apr 19, 2002 11:17 PM
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To get the CLASSPATH :

String clspath = System.getProperty ( "java.class.path" ) ;

Now you clspath contains the CLASSPATH environmrnt variable value.

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