How do i know if a SingleSelectionModel.getSelectedObject() will be NULL?

Question

Let me explain.

SingleSelectionModel<UsuarioDTO> selectionModel = 
new SingleSelectionModel<UsuarioDTO>();

@Override
public UsuarioDTO getUsuarioSelecionado() {
   return selectionModel.getSelectedObject();
}

I Call this when I want to get the selected UsuarioDTO, but when my application starts I dont have a UsuarioDTO selected so I will get a NullPointerException if a call this.

My question is: Can I compare something to avoid the NullPointer?

Answer 1

if (yourObject.getUsuarioSelecionado() == null) {
   // do something if it is null
} else {
   // do something with the DTO
   yourObject.getUsuarioSelecionado().callSomeMethod(); 
}

Is that what you're looking for? Check if something is null?