So if the value is null-able IntegerProperty is not the right type! You need to use a ObjectProperty<Integer> but this is more of a user forum question.
Tom On 10.06.15 13:56, Александр Свиридов wrote: > > I have a POJO class Test that has Integer and String fields (all of them can > be null). And I have javafx form with TextFields. To bind Test fields to text > fields I use adapter. Now I create an instance of Test (all fields will be > null) > Test test=new Test(); > TestAdapter adapter=newTestAdapter(test); > //the following line works, although String name=null > nameTextField.textProperty().bindBidirectional(adapter.getNameProperty()); > //the following line throws exception Integer id=null > idTextField.textProperty().bindBidirectional(adapter.getIdProperty(),newNumberStringConverter()); > This is the exception I get: >> Exception in thread "JavaFX Application Thread" >> java.lang.NullPointerException at >> javafx.beans.property.adapter.JavaBeanIntegerProperty.lambda$get$38(JavaBeanIntegerProperty.java:95) >> at java.security.AccessController.doPrivileged(Native Method) at >> javafx.beans.property.adapter.JavaBeanIntegerProperty.get(JavaBeanIntegerProperty.java:92) >> at >> javafx.beans.binding.IntegerExpression.getValue(IntegerExpression.java:69) >> at >> javafx.beans.binding.IntegerExpression.getValue(IntegerExpression.java:44) >> at >> com.sun.javafx.binding.BidirectionalBinding.bind(BidirectionalBinding.java:88) >> at javafx.beans.binding.Bindings.bindBidirectional(Bindings.java:869) at >> javafx.beans.property.StringProperty.bindBidirectional(StringProperty.java:111) > Everything works ok if I do this way > test.setId(0); > idTextField.textProperty().bindBidirectional(adapter.getIdProperty(),newNumberStringConverter()); > However, you can imagine how ugly this solution is - I loose all the > abilities of null value and for my CRUD application it is death. Please, help > me to understand how to work with Integer(and Others?) null values with > bindings and adapters. > > -- Thomas Schindl, CTO BestSolution.at EDV Systemhaus GmbH Eduard-Bodem-Gasse 5-7, A-6020 Innsbruck http://www.bestsolution.at/ Reg. Nr. FN 222302s am Firmenbuchgericht Innsbruck
