Questions tagged as 'java'

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save photo in 2 different tables java oracle database

I am 2 days ago trying to save a photo in 2 different tables of a database, the weird thing is that in the first table it saves the image but in the second one, I do not pass the code: @Override public void GrabarFoto(InputStream uploadedI...
asked by 02.02.2018 / 11:28
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Java hibernate: Error with Hibernate console configuration

I am trying to configure a project implementing Hibernate with postgresSql. When I try to configure Hibernate console configuration I get the following error and I can not continue: Does anyone know why it can be ?? Greetings and thanks...
asked by 28.01.2018 / 20:16
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How to pass a reference to it to a constructor of the main class?

The fact is that I am doing a calculator for my programming classes, nothing complicated but this is stuck in the end. I have a VentanaPrincipal class that is the graphical interface created with swing. And I have a PanelOperations class, where...
asked by 28.01.2018 / 23:03
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ResultSet returns java.lang.nullpointerexception although the conculta has a result

I have a problem with a query: private void cargar(){ query = "select idcte from clientes where nombre like '" + str1 + "';"; res = conn.Consulta(query...
asked by 03.02.2018 / 00:58
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How do I make an accountant come out as an object in my json?

This is my driver that I call it from a class called demand that I want to get the states counter for its id @SuppressWarnings({ "rawtypes", "unchecked" }) @CrossOrigin("http://localhost:8080") @RequestMapping(value = "counte...
asked by 02.02.2018 / 20:41
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Help with MVC, I'm a newbie u.u

Get me out of doubt, for example when doing a program with mvc, since the view sends the messages to the controller so that this in turn sends the message to the model, then in the model goes the logic of the application, in the controller is th...
asked by 03.02.2018 / 00:22
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Query data from an administrator and client view

I have a problem filling in the data of a table in a jsp. My model is as follows: The problem I have is in the index.jsp inside the menuProducts. When filling in the information with the following code: I do not get the d...
asked by 31.01.2018 / 07:48
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keycloak java API login user

I need to make a custom user login using the java keycloak API. I followed these instructions, Following keycloak documentation keycloak 2.2. Example using Java . I get the access and exile token with the following code: try { keycloak...
asked by 31.01.2018 / 09:47
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math problems

I would like to know how it can be done to divide two double variables. since with the operator '/' he tells me that it is not possible. In the same way, I wanted if somebody could tell me how the arguments of the hyperbolic functions are obtain...
asked by 28.01.2018 / 09:00
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Error: Component definition not found: canvas in [LanguageDefinition: xul / html]

I am trying to use canvas in my java project with the zk framework and I get this error when I go open the html I have already imported the canvas library, but even so I have searched but I can not find a solution. <zk xmlns="http://www.zko...
asked by 12.02.2018 / 21:12