Questions tagged as 'java'

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Android programming with Java [closed]

What topics and / or Java concepts do I need to know in order to start programming apps with a certain degree of complexity in Android?     
asked by 09.12.2017 / 05:49
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Error in transactions, mix in the requests to the database in hibernate?

I do not know where to look to correct this error, first commenting that this does not happen in a local testing environment, this error only comes out in production mode on the server, this error seems illogical and should not happen, is the ne...
asked by 08.12.2017 / 19:34
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Problems for java login by encryption

I'm doing a Login method in Java but I ran into a problem, because in the database the passwords are encrypted because the database is shared with another system that was made in Visual Basic This is the VB code where they encrypt passwords:...
asked by 07.12.2017 / 17:54
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Put zeros at the ends of a java matrix

I am creating a method that given a matrix, put the whole frame full of zeros, that is to say for the matrix 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 the exit should be 0 0 0 0 0 6 7 0 0 10 11 0 0 0 0 0 I have this code:...
asked by 02.12.2017 / 16:32
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Show image with itextpdf

I have an image in the following path of my project \ web \ resource \ img \ header2.jpg, I am using the library itextpdf I need to show the image in the PDF that is created and tried to declare it in different ways but it does not work find....
asked by 13.12.2017 / 22:19
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Rain effect in Android Studio

I'm trying to create the rain effect. I already created the sprite, what I do not know is how to make X number of drops per second or life time appear. Can someone help me? Thank you. Sprite: public class Sprite_Lluvia { private Bitmap...
asked by 20.12.2017 / 14:18
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Error with array (java.lang.ArrayIndexOutOfBoundsException: length = 5; index = 5)

I have an array that has several elements, all this contained in a database, but when I want to delete it with a method (with split) it does not leave me and it throws me the error of the title, how do I solve it ?, and all this , how can I see...
asked by 19.12.2017 / 08:15
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Serve an image from Servlet 3.0 contentType="multipart / form-data"

Greetings community! I pose the following problem, I have an image in a BBDD (format bytea[] ) and I want to serve an answer to show that image in my HTML. I do not have routes or directories, just the image in the database. It looks som...
asked by 19.12.2017 / 16:28
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How can I pass ArrayListFile to a service

I want to pass an ArrayList File to a service to visualize its data but it is not possible for me in the line that receives the information, the program stops, this is the code Method to send it public void SendToService(){ Intent ser...
asked by 16.11.2017 / 03:25
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Help! Implement a dialog-like view similar to Facebook comments in your app

I would like to know what is called the view that implements facebook in your Android app and how can I implement it, thank you very much in advance. This is the view I'm looking for     
asked by 18.11.2017 / 13:06