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ClassCastException when modifiying JOptionPane behaviour
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created by <a href="https://community.jboss.org/people/telcontarvi">Telcontar Thorongil</a> in <i>Javassist</i> - <a href="https://community.jboss.org/message/725909#725909">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm triying to modify the JOptionPane behaviour to log all the user responses. If do it when the class is loaded with HotsSapper is OK, but i can't do it whith the HotSwapper because the application it's launched by Java Web Start and i haven't be able to open the needed socket.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>If i try to modify the class before it's loaded i have an ClassCastException throwed by BasicOptionPaneUI. there is the code i use:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public class Test2 {</p><p>    public static void main(String[] args) throws Exception {</p><p>        ClassPool cp = ClassPool.getDefault();</p><p>        CtClass cc = cp.get("javax.swing.JOptionPane");</p><p>        CtMethod[] methods = cc.getMethods();</p><p>        for (CtMethod method : methods) {</p><p>            if (method.getName().equals("showConfirmDialog")) {</p><p>                if(method.getLongName().equals("javax.swing.JOptionPane.showConfirmDialog(java.awt.Component,java.lang.Object,                               java.lang.String,int,int,javax.swing.Icon)")){</p><p>                    String after = "System.out.println(\"User answered: \" + $_ );";</p><p>                    method.insertAfter(after);</p><p>                }</p><p>            }</p><p>        }</p><p>        try{</p><p>            Class c=cc.toClass();</p><p>            c.newInstance();</p><p>        }catch(CannotCompileException ex){</p><p>            ex.printStackTrace();</p><p>        }</p><p>        JOptionPane.showConfirmDialog(null,"Yer or Not?");</p><p>    }</p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Why is this happening? how can i fix it?</p></div>
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