Questions tagged as 'java'

Tagged questions
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Problem persisting in SPRING-DATA / JPA using Compound key / Does not return Id generated

Hello everyone, Has anyone had this problem when saving a class with a compound key, the Spring Data API does not return with the generated id? I made a test with primitive classes with unique id then it works normally and returns the generate...
asked by 21.02.2018 / 19:03
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Manipulating XML with java

It has a file .xml that has as main element (test cases) and as "daughters" the test case: <casosTeste> <casoTeste nome="NOME01"> <regex>TEXTO DE EXEMPLO 1</regex> </casoTeste> <caso...
asked by 06.03.2018 / 18:32
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Tess4j on Centos7 server

I'm doing an application with OCR (Tess4j) to use on server with wildfly on centos7. I was able to use it in windows and ubuntu, but in centos7 I'm getting it. I installed ghostscript and tesseract, but typing the path of the file and loading th...
asked by 20.02.2018 / 20:07
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Merge XLS Files (JAVA)

I have several .xls files with 1 sheet each, I would like to merge all sheets into a single file with several Sheet.     
asked by 20.02.2018 / 14:31
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Read a TXT file and put its content in a LinkedList

I need to read a TXT file and add its contents to variables in a list. However, the file does not have the same amount of characters in all rows. In the entry we have a sequence, two numbers in a row and a sequence of characters in another. E...
asked by 19.02.2018 / 21:16
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self-populated form with the remaining data of one of the selected fields

I wanted to have a dynamic form where the only thing that is asked is to select a user u from a list of users passed to the model from a controller, the email and status fields should be automatically displayed depending on the user who is selec...
asked by 20.02.2018 / 01:32
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Auto refresh browser

Good afternoon, I'm doing some testing on trello and I liked the function where when a card is created, another computer receives the notification and this same card appears without the need to update the browser. I would like to know how this w...
asked by 26.02.2018 / 20:22
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I can not run program in STS plugin in Eclipse

I added the STS plugin in eclipse to be able to create java Spring-boot projects, but when executing the project it appears that error. Erro: Não foi possível localizar nem carregar a classe principal br.com.impacta.springmvc.gerenciadordespes...
asked by 26.02.2018 / 21:13
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Illegal use of < when > -style tag without < choose > its direct parent

I'm developing a web application using jsp and servlet page and would like to show the data from my servlet in two repeat structures one with the produots and another with the plots but this error appears. Illegal use of &lt;when&gt;-s...
asked by 25.02.2018 / 02:18
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Personnel Mapping x Document OneToOne, Cascade

I created a Person and a Document class, the Document data I can persist, but at the time of doing OneToOne in the Person class and inserting a new table in the Person class, an error appears that the Document_ID table does not exist, the What c...
asked by 25.02.2018 / 18:11