Re: Problems with Constructor Methods

From: Chris Smith (cdsmith_at_twu.net)
Date: 11/27/04

  • Next message: Nigel Wade: "How to install plugin for 1.5 on Windows" 
    Date: Fri, 26 Nov 2004 18:24:09 -0700

    JS <dsa.@asdf.com> wrote:
    > I guess class test and class NameLength has the same function. But why then
    > has NameLength the line JOptionPane.showMessageDialog(null,
    > "Finished!");
    >
    > And why does it have two c.readNameAndDisplayItsLength();

    I don't know. I suppose it was just written that way. Do you mean that
    you didn't write it?

    > When i write: java NameLength I get the following error:
    >
    > NoSuchMethodError: HelperClass.readNameAndDisplayItsLength()V
    > at NameLength.main(Johannes_Serup_48.java:149)
    > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    > at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    > at java.lang.reflect.Method.invoke(Unknown Source)

    Any chance that you've made the wrong code available to the Java virtual
    machine?

    A NoSuchMethodError never indicates a problem with your code; it means
    that the virtual machine is finding different code than the compiler
    found. Now, it just so happens that you've posted TWO different classes
    both called HelperClass (bad idea, by the way; why not call one of them
    HelperClass2, or something like that), and I bet the VM is finding the
    wrong one. 

    -- 
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