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URLClassLoader How To Use?

/* Extract Classes From Jar */

myATP.extractFromJar(fileList1, jarFile);

/* Load Classes Into JavaVM */

pathname = jarFile.getPath();
workingDir = new URL(pathname);
urls[0] = workingDir;
try {
loader = new URLClassLoader(urls);
loader.findClass("Agent.class");
loader.findClass("tcpClient.class");
} catch (Exception e) {
System.out.println(e);
}

I get errors with both the loader.findClass lines, the error is:
testReceive.java:59: findClass(java.lang.String) has protected access in java.net.URLClassLoader

ASKER CERTIFIED SOLUTION

CEHJ

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SOLUTION

Tommy Braas

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doronb

The method findClass(..) is a protected method which is a part of the ClassLoader's API to let you build your own customized ClassLoaders, do what CEHJ says, he knows ;)

Use loadClass(..), or better yet, Class.forName(String className, boolean initialize, ClassLoader loader);

Tommy Braas

Or skip extracting the files from the jar and do the following:

workingDir = new URL("jar:file:///" + pathname);
URClassLoader loader = new URLClassLoader(new URL[]{workingDir});
loader.loadClass("Agent.class"); // provided Agent.class is defined in the default package, otherwise its package is needed as well