Questions tagged as 'java'

Tagged questions
2
answers

Just paste into a JTextField

I need to do in Java, that in a JTextField only data can be copied, that is: not allow data to be entered directly from the keyboard just allow a data to be copied from another side and pasted into the JTextField. Is this possible?    ...
asked by 03.11.2017 / 13:04
1
answer

How to freeze and thaw a jframe? [closed]

I am learning to program with the java language and I am already using the JFrame and I would like to know how to click on a button to put another JFrame in front and not let me return to the First Jframe until I press the button of the second J...
asked by 31.08.2017 / 19:38
2
answers

Events javafx CRUD buttons

I am developing a project (with javafx and scenebuilder) where I have to save the information of a stage in the database. The problem that appears to me is that the scene builder when I try to put the method that I made in the class does not let...
asked by 29.08.2017 / 05:43
1
answer

Arraylist only with approved students

Good I have an exercise carried out where I introduce a series of data of students and I keep them in an arraylist. What I want is to save in another arraylist only the students whose average grade is greater than or equal to 5 but I do not know...
asked by 27.08.2017 / 08:54
2
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Can not resolve symbol 'R'

From one moment to the next, all my Activity java shows me an error in the resource R     
asked by 04.09.2017 / 01:00
1
answer

query with LIKE operator mysql java

I am dynamically creating a Select by concatenating a series of parameters that are collected from a form. @Override public List<ResultadoBusquedaEnsayo> buscarEnsayos(BusquedaEnsayo busquedaEnsayo){ List<Object> parametros =...
asked by 23.11.2017 / 10:38
1
answer

Unable to convert String to Double

I have a JTable where I load the data that I have in my BD, based on those records I make a simple operation, the data I enter and with which I do the operation I declared them as Double , at the moment to save the new data without...
asked by 25.08.2017 / 13:08
1
answer

Doubt with servlets of java and sql [closed]

In this small servlet I am entering the values in hard and I would like the hard values to have parameters so that the information can be stored since it would be on the client's side where this information is entered. protected void doGet(Htt...
asked by 15.08.2017 / 22:27
1
answer

What is the difference between bean staleful and staless?

What is the difference between a staleful and staless EJB? The categories for the sessionBeans, but what would be the concrete difference?     
asked by 24.08.2017 / 15:53
1
answer

Capture GPS data with JAVA [closed]

I'm doing an application to show data from some gps on the web, but I'm not clear about the topic of capturing the frames I would like to make a socket in java but I'm not sure how to do it, so that it runs in the background and I capture the...
asked by 24.08.2017 / 07:29