Questions tagged as 'java'

Tagged questions
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Multiplication of Matrices

How can I finish this matrix multiplication code with an accumulator? MatrizA=3x4 - MatrizB=4x3 - Resultante=3x3 : for (j=o; j<n-1;j++){ for (i=0; i<m-1;i++){ Acumulador=0; for (k=0...
asked by 25.11.2018 / 05:56
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java.sqlexception: no suitable driver found for root

I created a java program that creates a connection to the database and I get the error java.sqlexception:no suitable driver found for root . I do not know where the error can come from and I need help. I show you my code below: pac...
asked by 25.11.2018 / 07:19
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Error creating file using createNewFile

I'm doing a program that needs to create a file that stores an array to load it later, the problem is that when I create it I get the following error: E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.victor.miscompaneros, PID: 1328...
asked by 16.11.2018 / 18:04
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Insert data into related tables Mysql Java

My question is this: How to insert data into both a parent and a daughter table. My problem is that in my Java project I have as a parent class a Persona and its two child tables Cliente and Empleado . Class Cliente...
asked by 16.11.2018 / 18:40
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Modify doc from word launched from the web and stored in BLOB

I need to integrate a text editor into the system I am working on. there is already a .doc word document editor that works like this. You click on the new document on the page, it uses a program on the PC that manages the word, which opens a...
asked by 16.11.2018 / 00:29
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How to remove the filter in a JTable

I'm making a table in which I need to filter some data, I do this with a combobox, to filter it works well, but when I select the index 0 item (default) it does not return the table to its normal state What do I do? I use this code. public...
asked by 16.11.2018 / 01:56
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JAVA - Doubt with error in form

I tried to make this program, the problem is in the final part where it refers to add an "agenda". Which does not appear anywhere else in the tutorial except at the end. Program link link Business Package.Control public class Persona {...
asked by 16.11.2018 / 01:55
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Decompose a number in ones with problem in the deployment

I have made a program in java, which decomposes in a sum of numbers some, to a value x, which is entered by the user. The inconvenience that I have is when I deploy, since I always have an extra "+" sign, example: stable that the limit is 5....
asked by 18.11.2018 / 03:07
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How to unmark a RadioButton on android? (only one, without radio group)

How to unmark a RadioButtom on android? I click on it and it is marked but I can not uncheck it, try putting a click listener but it did not work for me rdbBiopsiaCon.setOnClickListener(new View.OnClickListener() { @Override p...
asked by 18.11.2018 / 06:19
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mask for mail

I tell you, I'm working on a web system in java with maven, and I want to mask the mail that shows a password recovery screen, very similar to the one in the image: but I need it to be of the format: [email protected] (that is, from the...
asked by 16.11.2018 / 12:50