J2SE Version (please include all output from java -version flag):
    java version "1.5.0-beta"
    Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b32)
    Java HotSpot(TM) Client VM (build 1.5.0-beta-b32, mixed mode)

Does this problem occur on J2SE 1.3 or 1.4.x? Yes / No (pick one)
    No (L & F and Sun Java Desktop System)

Operating System Configuration Information (be specific):
    (Linux) Sun Java Desktop System, 2003

Hardware Configuration Information (be specific):

    Platform configuration:

    CPU: Intel 32bit Single Processor
    Processor Speed: 1893 MHz

Bug Description:
    NullPointerException occurs during Introspection.
    The Methods getAddListenerMethod() and getRemoveListenerMethod() return a null pointer.

    I already mentionned a similar problem with Windows

        >Hi,
        > Bug 4915038 has been closed as to duplicate to bug 4910243.
        > There were a number of problems in Beans from the vast changes
        > implemented in 4809008; b16 and b17 still have quite a lot of issues
        > and b18 should be more stable.
        > Sorry for the inconvince that cause!
        >Thanks for reporting the problem.

Steps to Reproduce (be specific):
    The problem with Linux occurs when Swap is intensively active.
    Increasing the "-Xms128m -Xmx128m" parameters seems to solve/hide the problem.
    I am unable to write a small application to show the problem because a big activity is needed.
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