How to Execute (Vector) Storage.getInstance().readObject(filePath); in Java 8 Swing Package

Windows 10 Pro Latest Simulator Java Swing Project

I would like to execute "Vector a1 = (Vector) Storage.getInstance().readObject(filePath);" In a Java Swing Application running on Windows 10 platform, I tried import CodenameOne.jar in Swing package, however when executing above code, get null pointer exception in Storage.getInstance()

Is there a way to execute this in Swing?

Thoughts?

Best Regards.

Thanks, I did not init the Display, however "Display.init(Object m)" requires an Object Argument and the Init method is deprecated.

Can you please provide me the codenameone Display dependencies? And perhaps a java Swing snippet of code to initialize Display in order to execute Storage.getInstance().readObject(filePath)

Thoughts?

Best Regards

Thanks, Passing init(working directory) solved the Exception thrown. Here is the Code snippet used to allow me to execute: Storage.getInstance().readObject(filePath).

    String filePath = incSrv.Pwd();// gets working directory
    try {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                Display.init(filePath);
                String fileName = "A1-MMA.properties";
                Vector a1 = (Vector) Storage.getInstance().readObject(filePath);
            }
        });
    } catch (Exception e) {
    }

And it does appear to work, However I am left with a blacked out form that appears modal. How can I avoid this or dispose it?.

FYI: What I am creating here is a work around for serializing Vector in Codenameone. I Save Vector to file using "Storage.getInstance().writeObject(Path, Vector)" I convert the file to bytes and write it to the Swing Server VIA socket. Using Storage.getInstance().readObject(file) on the Swing Server I have deserialize the object into the Vector from my app. This appears to work well and is more efficient than the current method I use to deliver complex Vectors from the app to the Swing Server.

Can you please let me know if you see a red flag with this workaround? Like The ability to Storage.getInstance().readObject(file) on the Swing Server may go away? This method will save a lot of time in movind Vector data to and from the App/Server.

Thoughts Best Regards

Storage.getInstance().readObject(file) // (A1ServiceSrv.java:571)
Caused this Exception:
java.lang.NullPointerException
at com.codename1.io.Storage.init(Storage.java:89)
at com.codename1.io.Storage.getInstance(Storage.java:112)
at Main.A1ServiceSrv.loadVectorFromFile(A1ServiceSrv.java:571)

Regards

12/11/2021: Thanks Shai,

I am including in my classpath CodenameOne.jar with update date of 12/11/2021 after CN1 refresh. Getting Same null pointer exception. Passing in Path "C:\Src1\A1-Arms\A1-Server\A1-MMA.properties" (Absolute Path) Also Tried "A1-MMA.properties", however I don't think Codenameone knows where my home path is since we are not initializing it as we did with

    Display.init("Current Working Directory where files reside");

This is the Fresh Stack Trace w/o calling Display.init (12-20-2021) java.lang.NullPointerException at

com.codename1.ui.Display.getResourceAsStream(Display.java:3086)
        at com.codename1.io.Log.print(Log.java:327)
        at com.codename1.io.Log.logThrowable(Log.java:299)
        at com.codename1.io.Log.e(Log.java:285)
        at com.codename1.io.Storage.readObject(Storage.java:271)
        at Main.A1ServiceSrv.loadVectorFromFile(A1ServiceSrv.java:596)
            
            vector = (Vector) Storage.getInstance().readObject(filePath); // (A1ServiceSrv.java:596)