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Hello, Not work in Win11

Open nameHui opened this issue 9 months ago • 2 comments

in win10 it's work . in win 11 , this line TwainIdentity id = (TwainIdentity) ids.next() error; why we can cast java.util.concurrent.Semaphore to free.lucifer.jtwain.TwainIdentity how to fiexd this question, can you provide some suggestions,thanks

public String[] getDeviceNames() throws TwainException {
    List<TwainIdentity> identities = new ArrayList<>();

    Twain.getIdentities(this, identities);

    String[] names = new String[identities.size()];
    Iterator<TwainIdentity> ids = identities.iterator();
    for (int i = 0; ids.hasNext(); i++) {
        TwainIdentity id = (TwainIdentity) ids.next();
        names[i] = id.getProductName();
    }
    return names;
}

Unhndled exception java.lang.ClassCastException: java.util.concurrent.Semaphore cannot be cast to free.lucifer.jtwain.TwainIdentity at free.lucifer.jtwain.TwainScanner.getDeviceNames(TwainScanner.java:64)

nameHui avatar Apr 22 '25 04:04 nameHui

I am very sorry, but I have not tested the project for compatibility with Windows 11. I can only speculate that the function is not working on line 1212 of the Twain.java file; there might have been changes in the behavior of the WndProc DDE function:

I will be able to check this after returning from a long business trip, sometime around August. If you find a solution yourself, you can contribute to the project.

This code is supposed to execute, but there is no execution coming from WndProc.

                    List list = (List) obj;
                    Semaphore s = (Semaphore) list.get(0);
                    list.remove(0);
                    sourceManager.getIdentities(list);
                    s.release();
                    break;

If this helps, you might want to check the incoming events in the TwainWndProc.java class and their parameters.

DenisLAD avatar Apr 22 '25 16:04 DenisLAD

Thank you for your reply. The issue has been resolved through other issue

nameHui avatar May 09 '25 06:05 nameHui