Sample code for loading a class file from a jar file, dynamically.

[Nisha gowda]

Hi,

I need a help in writing a java program which loads a class dynamically.I have a sample.jar program at /home/nisha/sample.jar.

This sample.jar has MySample.class. I want to load Mysample.class dynamically using sample.jar. I want to pass sample.jar through source code and not by setting CLASSPATH env. Something like URI.getResource can be used.

I have idea on how to load a class file. But need help in passing the path of a jar file and loading MySample.class from test.jar

Could somebody help me?

Regards,
Nisha

[Kris Schneider]

Well, if you pass the location of the JAR file to your program as a String, you can create a File for it. From the File you can get a URI and from that you can get a URL (going directly to a URL is deprecated in 1.6). Once you have a URL, you can create a URLClassLoader. Once you have a class loader, you can call Class.forName(className, false, classLoader).

[Campbell Ritchie]

Welcome to the Ranch