Question

I am getting “JVM error 104” error message, when I try to run my Blackberry application.

If I add the following statements, I am getting the issue. All classes are MainScreen.

1.) Ui.getUiEngine().pushScreen(new SubCardSelection());

2.) Dialog.alert("Welcome");

My question is; Why I am getting this error message ?

Thanks in advance.

Answer 1

It could be because:

• you forget to set the right style (ButtonField.CONSUME_CLICK) as in this thread

ButtonField searchButton = new ButtonField( "Search" , ButtonField.CONSUME_CLICK | ButtonField.FIELD_HCENTER );
searchButton.setChangeListener( new FieldChangeListener(){
    public void fieldChanged( Field field , int context){
        Dialog.alert( "Pressed Search" );
    }
});

• or just because you don’t consume the events in the right place (as explained here):

You are adding some fields to the screen in the constructor (correct), then attempting to retrieve the values from the fields in the same constructor (incorrect).
The fields will not even be displayed to the user until you exit the constructor and allow the framework to display the screen.

Any way, that ends with a runtime uncaught exception, which is what “JVM error 104” means.