Questions tagged as 'java'

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FileUpload java saves files in an improper folder

I found an example of fileupload on the internet and added it to my project. However, it uploads the files to a folder inside the glashfish server. This folder is named /config , and all the way I put it to create it, it creates only withi...
asked by 21.01.2017 / 16:21
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ERROR: column "type" of relation "tb_people" does not exist

Hello. I'm trying to persist a record, but when I run it, it is returning the error below: // ... @Inheritance(strategy = InheritanceType.JOINED) @DiscriminatorColumn(name = "tipo", discriminatorType = DiscriminatorType.STRING) @Discriminat...
asked by 21.01.2017 / 14:55
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PreferenceActivity # findPreference () returns null

Could anyone help with the error below? I'm a beginner with android and I could not identify where I went wrong. Thank you! Log Error 01-22 11:45:32.722 13037-13037/com.example.android.sunshine.app E/AndroidRuntime: FATAL EXCEPTION: m...
asked by 22.01.2017 / 11:53
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How to draw an image from scratch using the drawimage or drawRGB method in J2ME on Sun's WTK?

Can the drawimage or drawRGB method create from scratch any image or graphic or icon in png format for j2me games or not? Can I draw an image using the drawimage or drawRGB method without having to load an image from...
asked by 21.01.2017 / 14:10
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EclipseLink and JPA

I have problems trying to write information to the database, in a simple WS with JPA, EclipseLink and Postgresql database. I can fetch data and display it as json in the browser with GET methods, however I am also presetting to write data (PO...
asked by 05.01.2017 / 12:57
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How to add the necessary permissions for Printer Job to work on Tomcat7

Environment My environment is Tomcat7 and I'm using Java 1.8, Windows 10 and I'm using a PDF Reader to test the print. My user is an administrator of the machine. Problem I'm trying to send a PDF to print, but this PDF does not prin...
asked by 25.10.2016 / 20:29
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Excel with more than 300 thousand lines

Good evening, I have a problem with Excel. The spreadsheet has more than 300 thousand lines and when I run the application with 30 thousand lines I have no problem. The error only happens with files that have many lines. Exception in thr...
asked by 27.10.2016 / 01:55
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Best Scenarios: Recording in table from n to n Hibernate

I have some doubts about writing records in tables from N to M. My scenario is as follows: InmybankwheninsertingadoctorIinsertinthe"Doctor" table the registration of Doctor, and in "Doctor x Specialty" the specialties of this doctor. Registr...
asked by 26.10.2016 / 15:25
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Vraptor unit test Mockito (CDI)

Can anyone give me a glimpse of how to do unit tests using Mockito next to the full CDI of the Vraptor application? I use a lot of CDI to control my objects like automated management of my dao next to the manager with the @Inject. More usi...
asked by 10.11.2016 / 13:17
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Send text file to PgAdmin

I need a little help, I'm a beginner. I have to send a txt file that I open in netbeans to a PgAdmin table. If you see the code, you will understand me. I tried to put my method that shows the txt file in INSERT but it did not work. I do not...
asked by 09.11.2016 / 17:53