In .jar file how can I call API's of other .Jar file

Question

Hi all,
I have created a "MyApplication.jar" file that dose not need any other .jar file Like xercesImpl.jar thne it is working fine.
but If I make the .jar file of application that needs xercesImpl.jar API's
of this .jar file then how I can call that xercesImpl.jar in my Application.jar newly created.
please help me
Thanks in advance.

Answer 1

either add the other jar file to your classpath or do the following (taken from http://javaalmanac.com/egs/java.lang/LoadClass.html)
e68. Loading a Class That Is Not on the Classpath
A URLClassLoader can be used to load classes in any directory.
    // Create a File object on the root of the directory containing the class file
    File file = new File("c:\\myclasses\\");
    try {
        // Convert File to a URL
        URL url = file.toURL();          // file:/c:/myclasses/
        URL[] urls = new URL[]{url};
        // Create a new class loader with the directory
        ClassLoader cl = new URLClassLoader(urls);
        // Load in the class; MyClass.class should be located in
        // the directory file:/c:/myclasses/com/mycompany
        Class cls = cl.loadClass("com.mycompany.MyClass");
    } catch (MalformedURLException e) {
    } catch (ClassNotFoundException e) {
    }