I'm studying Java and I need to understand the logic of a code here. I wanted to know what this snippet does:
public class UsuarioController extends HttpServlet {
private DAO dao;
public UsuarioController() {
super();...
If I have a code, for example:
if(window!=null && window.isOpen()){
//todo
}
If window is null , will it still try to call the second proposition or not check anymore? Because if it tries to call, then it will give...
What is the difference between these two types of creation / instantiation of an object?
Usuario usuario = new Usuario();
usuario.listar();
new Usuario().listar();
Why are the results of System.out different in the lines below?
Integer teste = Integer.valueOf("0422");
Resultado: 422
Integer teste = Integer.valueOf(0422);
Resultado: 274
If you pass a int it changes the original value, no...
When deploying an EAR with an EJB that depends on demoiselle-core , a StackOverflowError exception is thrown.
When you try to create a ResourceBundle (ResourceBundleProducer.createNamed (ResourceBundleProducer.java:77)), the Beans class (...
I have two strings that receive hours, in this case, ArrivalTime and DepartureTime. The next format is HH: MM: SS.
I would like to format this string for HH: MM how can I do this?
I enter this text in ToggleButtons (setTextOn and setTextOff)....
Could anyone explain why this happens? My apk only works right if I put denial and do something:
public class Main2Activity extends AppCompatActivity {
private EditText nome, teste, cpf;
private Button button;
@Override
protect...
I'm having trouble executing some commands through java. If I run them directly from Netbeans or run the project directly from my machine it works perfectly any of the commands below:
String comando = "cmd /c \"//Server/Sistema/Scripts/execu...
I'm trying to start programming on Android. I created the project and came up with this code:
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.tela_1);
}
@Over...