Questions tagged as 'java'

Tagged questions
1
answer

How to use the Scanner to capture input from the keyboard? [duplicate]

I would like to know how to use Scanner in java to simulate cin and cout of c ++     
asked by 17.02.2016 / 23:26
2
answers

Lock F5 key in the application

Good afternoon, I'm developing a Java Web application, and I noticed that after making a registration and typing F5 the information is duplicated, only the ID that does not duplicate because it is serial. Can anyone help me if it is possible t...
asked by 30.06.2015 / 20:41
0
answers

What error is this javax.servlet.ServletException: getOutputStream ()? [closed]

I am generating a report, the moment I click to send it and it displays this error. Exception : javax.servlet.ServletException: getOutputStream() has already been called for this response at javax.faces.webapp.FacesServlet.service(Fac...
asked by 29.06.2015 / 15:17
0
answers

Does an Android service lock the app even when running in the background? [closed]

Does an Android service crash the app even while running in the background? Or is there something wrong with my application? I have a database where the last table has 3000 rows. With this I decided to insert in the background using a service...
asked by 09.11.2015 / 20:16
1
answer

How to validate a signature with a private key?

I get an HTTP request that comes in the HEADER a signature (SHA1). I have, stored in a String, a private key. I need to generate the signature between the BODY of the HTTP request and my key and compare it with the signature that comes in the HE...
asked by 13.11.2015 / 14:44
0
answers

Wildfly in production does not retrieve property values and SQL scripts

I'm using a development environment and another production environment, in the development environment using the concept of i18N (internationalization) is correctly retrieved for example the value of label.carro which is Carro , how...
asked by 12.11.2015 / 14:58
0
answers

How do I make a download on a web page having the files on my computer, outside of my web project? [closed]

I need to make a web application that the user uploads PDF files and can download them later. The upload part is done, except the files in a folder of my PC /home/william/web . To save the files to my PC, I edited the file server.xml...
asked by 07.11.2015 / 22:14
1
answer

Customize error page to connect timed out in Spring

I'm trying to create a friendly error page in case LDAP is off the air, but unfortunately the only answer I get is j_spring_security_check . I tried to map the exception in web.xml , but I was not successful. <error-page>...
asked by 03.11.2015 / 15:18
1
answer

JPA / Hibernate problem with concurrency and persistence in JRE

I'm working on a project to create a simple server running on Java SE. I am using JPA + Hibernate to perform persistence, however concurrent routines are a problem. I'm wasting a lot of time trying to solve the problems generated by Hibernate wi...
asked by 16.04.2015 / 05:50
0
answers

GAE: Managed VMs - Support for Java 8

   [rant mode on]       The community is asking Java 8 support for the GAE . This month Oracle's official public support for Java 7 ends . It looks like there will be no side changes in the GAE before the end of the Java 7 lifecycle.     ...
asked by 11.04.2015 / 00:10