Questions tagged as 'java'

Tagged questions
2
answers

Error JSF, I created my project in eclipse and I get this error

Could you please tell me what is the solution to this error?     
asked by 01.02.2017 / 16:32
1
answer

Request method 'POST' not supported

I'm trying to redirect to another page but by putting the name of the value of the RequestMapping and raising the system I get an error of "Request method 'POST' not supported". Main Controller @RequestMapping(value = "/hello.do", meth...
asked by 01.02.2017 / 14:13
1
answer

Problem with Oracle OJDBC6

I have a Maven Module project of Liferay 7, which I want to implement a connection to Oracle through the OJDBC6, I have my connection which is the following: public static Connection getConnection() { if (connection != null) { retu...
asked by 29.03.2017 / 20:25
3
answers

What JFrame event allows me to execute a method while the JFrame is Open?

I am looking to implement an event of JFrame that allows executing a method as long as the JFRAME is active, If the method exists, can someone give me the name and an implementation example? PS: I tried the event windowAct...
asked by 29.03.2017 / 20:35
1
answer

Java - Doubt with imports

Good morning. Why this does not work? import java.lang.System; out.println("Hola mundo"); Sorry I can not put the full code, but I'm from the cell. Thank you very much.     
asked by 23.02.2017 / 16:38
2
answers

Database connection error

I want to connect a database to java but it gives me a mistake and I do not know what it is I hope you can help me The error is this: Here is the code: And here the BD:     
asked by 26.11.2017 / 18:54
1
answer

Paint the rows of a JTable according to a condition - Java

I have a JTable tbDocTransfer with 17 columns full of information, what I want is to paint each row that meets the following condition: if in the first column of the JTable rows it says "E" it is painted red and if it does not say nothing is pai...
asked by 23.02.2017 / 20:21
2
answers

Backup Mysql - JSP

It's the first time I try to make a backup of a BD Mysql from a JSP This is my code (In some forum I saw it). <%@page import="java.sql.*" %> <%@page import ="java.util.Calendar" %> <% try{ Calendar fecha = C...
asked by 19.04.2017 / 17:06
1
answer

Error starting activity GoogleMaps

I have an error when starting my activity where googlemaps is    FATAL EXCEPTION: main Process: com.appmovilperote, PID: 9854   java.lang.RuntimeException: Unable to start activity   ComponentInfo {com.appmovilperote / com.appmovilperote.Goog...
asked by 27.01.2017 / 06:10
1
answer

Export to Excel - Java

This is the code I use to export to excel: @SuppressWarnings("resource") protected void btnExportarExcelActionPerformed(ActionEvent arg0) { JFileChooser seleccionar = new JFileChooser(); File archivo; if (selecci...
asked by 12.01.2017 / 20:50