I did call defineClass, but don't know if I am using an appropriate
Classloader.
I am working from an article that was in the February 2002 issue Java
Developer's Journal by Norman Richards.
here is a portion of my UIGenerator class:
public class MYNEWComboBoxUIGenerator extends ClassLoader implements
Constants {
private InstructionFactory _factory;
private ConstantPoolGen _cp;
private ClassGen _cg;
public ComponentUI generate(UIManager.LookAndFeelInfo lf, JComponent comp)
{
new GuardianComboBoxUI$GuardianComboPopupGenerator().generate(lf,
comp);
new GuardianComboBoxUI$PropertyChangeHandler2Generator().generate(lf,
comp);
String lfName =
lf.getClassName().substring(lf.getClassName().lastIndexOf(".") + 1,
lf.getClassName().length() - 11);
String lfPackage = lf.getClassName().substring(0,
lf.getClassName().lastIndexOf("."));
String className = "combo_research.Guardian" + lfName + "ComboBoxUI";
String superClassName = lfPackage + "." + lfName + "ComboBoxUI";
//need to get rid of last node in classname
_cg = new ClassGen(className, superClassName, "", ACC_PUBLIC |
ACC_SUPER, new String[] { });
_cg.addEmptyConstructor(ACC_PUBLIC);
_cp = _cg.getConstantPool();
_factory = new InstructionFactory(_cg, _cp);
// createMethod_0();
createMethod_1(className);
createMethod_2(className);
createMethod_3(className);
createMethod_4(className);
createMethod_5(className);
createMethod_6(className);
byte[] data = _cg.getJavaClass().getBytes();
Class c = defineClass(data, 0, data.length);
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: "BCEL Users List" <[EMAIL PROTECTED]>
Sent: Monday, November 25, 2002 1:58 PM
Subject: Re: making classes available
> Hi Chris,
>
> Once you have the bytecode for the class, you can use
ClassLoader.defineClass to
> make it available to the JVM. Make sure you're using an appropriate
ClassLoader.
>
> God bless,
> -Toby Reyelts
>
> > What I need is an example of generating a class at runtime and just
making it
> > available to be accessed at any future point instead of returning an
instance of
> > it immediately.
>
> --
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