Questions tagged as 'java'

Tagged questions
2
answers

ActionPerformed within MVC

I have a question about a project that I am doing, which is the following: I am being asked for a project with MVC format, I already have the view and the model, I need to perform the ActionPerformed of each button of my project, which are appro...
asked by 30.05.2018 / 20:59
1
answer

I have the following error, which I can not solve in the andorid studio xml

I am doing an App in Android Studio and it throws me the following error that seems to be a failure to inflate the view in my XML file but I can not give it a solution. This is the XML <?xml version="1.0" encoding="utf-8"?> <a...
asked by 26.05.2018 / 15:20
2
answers

Error in the switch case that I do not understand

I have made this program that is a stack. In this case I decided to make a menu in which I called the methods but when it comes to calling them it does not work for me, it makes me wrong all the cases. I think my mistake is when calling the m...
asked by 30.05.2018 / 09:50
1
answer

If in a for I need acesoria

I have a problem in my code, probably it's the most basic but I've been with it all week and I really do not know how to solve it, I have to deliver the program in a few hours, I need help This is the error: Exception in thread "JavaFX Applica...
asked by 13.12.2018 / 06:47
2
answers

Generate numbers for a matrix in java

I need to generate random numbers from 3 to 10 in a matrix of 8x8 without repeating them and since the matrix is something big the other numbers should be placed in 0 an example {0,0,0,0,0,6,0,0} {0,0,3,0,0,0,0,0} {0,0,0,0,0,0,0,9} {0,0,0,4...
asked by 03.12.2018 / 15:02
2
answers

utlizacion combobox with database

I have to fill a combox with a single data from the database and I can not do it please someone to help me thanks this is the image of my database this is the code I am using and I need to show it in this part where it says search by date...
asked by 11.12.2018 / 13:00
1
answer

Results of MySQL query from java

Good morning, By making a database query from java, I am unable to know how to interpret the results. I have the following code, which should find me in a database if the game is included and if the column also belongs to "-". Statement st...
asked by 13.05.2017 / 01:18
1
answer

Calendar on android using Date Picket

I am trying to add a calendar to my application, my code is as follows: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_calendar); btn_fecha = (Bu...
asked by 21.05.2017 / 21:53
1
answer

java.lang.NullPointerException to Load Image

Good morning everyone, I have a java.lang.NullPointerException error when I try to upload a photo to a JLabel. this is the following code based on the MVC pattern: this is the final method that will be executed in the JFrame pri...
asked by 30.05.2017 / 18:50
1
answer

Update image of a listview update incorrect index

I need to update the image of each position of my listview , the problem is that so far it updates the image, but of the wrong index, in the screenshot below there are 2 buttons, for 2 images respectively, the current problem is that the s...
asked by 17.04.2017 / 20:35