Questions tagged as 'java'

Tagged questions
2
answers

Calling an Activity within a Fragment - Android Studio

I need that from the click of a button inside my Fragment, it calls an Activity. My code looks like this: public class ActFoto2 extends Fragment implements View.OnClickListener, ViewTreeObserver.OnGlobalLayoutListener { private Button pr...
asked by 01.06.2016 / 20:08
1
answer

Backup mysql by java

Good afternoon, I have a cmd that correctly backs up my database, but when running in java it does not open the cmd in the expected way, it follows the code: package sistemaMiriam.backup; import java.io.IOException; public class MySQLBackup...
asked by 28.04.2016 / 19:58
1
answer

How to make the program change the scene based on the action of a button in JavaFX with Scene Builder?

Hello everyone. I am trying to create a game in which the first window displays 2 buttons. One must activate 1 player mode and another 2 player mode. When one of the modes is selected, I want to close this scene and open another one, but so far...
asked by 16.04.2017 / 18:53
2
answers

How to do a direct calculation in the database

I would like to calculate a teacher's salary based on the discipline load it teaches, I created a Java algorithm for it, but I can not pass it on to SQL Algorithm in Java public double calcSalario() { //Calcula o salário do professor sw...
asked by 02.07.2017 / 07:16
1
answer

How to capture the CMC7 code with the Tesseract API?

To contextualize my problem, I'm doing character reading in images using the Tesseract for Java API, tess4j . More specifically, the images are from bank checks, where I need to capture the code CMC7 . What happens is that the API can not reco...
asked by 02.06.2017 / 16:39
0
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Printing multiple pages

I have a class that makes the pages impression, however, I'm having trouble breaking pages. In examples I've seen, they control this by the number of lines per page, but in my case, I'm not sure the number of lines, because I have fonts of va...
asked by 14.10.2014 / 14:05
1
answer

Connection Error with the Database in ANDROID

I created a database on localhost, and wanted to pull this database to my Android, I created two classes, CONEXAODAO, and ConnectionMYSQL: public class conexaoDAO { public String tabelaDepartamento () { String departamentoNome = "...
asked by 14.08.2015 / 19:55
2
answers

NullPointerException error, where is the error?

I wanted to know where the error is. I read that the NullPointerException error is when we try to access a variable that was not initialized, I just did not find this error in my code. import java.sql.Connection; import java.sql.DriverM...
asked by 29.07.2016 / 21:45
2
answers

MPAndroidChart Chart

I'm using MPAndroidChart to make graphics. The problem is this, when I have too many items in the caption, it expands leaving the graphic small. Can you create a scroll in the legend instead of expanding it and consequently decreasing the gra...
asked by 25.01.2016 / 14:15
1
answer

No qualifying bean of type found for dependency

I looked in Stackoverflow and Stackoverflow in Portuguese but nothing guaranteed the solution to the problem. I have passed several times for this problem but at the moment I can not find the solution, it follows:    Caused by: org.springfram...
asked by 26.02.2016 / 14:59