TomJ questions

• setPromptText() function not working initially with TextField
• com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '' for key 'PRIMARY'
• java.lang.IllegalArgumentException: Children: duplicate children added: parent = VBox@872be7
• How to change the text font size in javafx?
• What are JavaFX, FXML and Scene Builder?
• How to disable Button when TextField is empty?
• Android Studio 3.2 - Could not find com.android.tools.build:aapt2:3.2.0-4818971

TomJ answers