Questions tagged as 'java'

Tagged questions
2
answers

Error creating Database in Java

I try to create and access a java database, I am using the postgresql-42.2.2 library. This is my method: public static void main(String[] args) { Connection c = null; try { Class.forName("org.postgresql.Driver"); c = Driver...
asked by 05.06.2018 / 21:45
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Error java.lang.NoSuchMethodError with java CUP

I am doing a compiler for the tiger language, I am using java CUP for the parser, the problem is that I need to put the following grammar: prog := exp | decs decs := dec* As dec can be empty in CUP I put it in the following way: d...
asked by 05.06.2018 / 04:03
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How to send a report to call with iReport

Hello, I created a report with ireport and jsperReport and I used this code: String path = "C:\Users\Juan\Documents\NetBeansProjects\Archivero\src\Reportes\Pendientes.jrxml"; try { JasperReport reporte; reporte=(JasperReport)JRLoader.l...
asked by 04.06.2018 / 18:35
1
answer

id can not be resolved to a variable

I would like to know why these errors come out: An error occurred at line: 383 in the jsp file: /cinema.jsp id cannot be resolved to a variable 380: %> 381: <tr> 382: <td> 383: <%=id%> 384: </td> 385:...
asked by 04.06.2018 / 18:15
1
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pass information of a jtable that is in a frame to another Jframe

I have two windows two jframes worth. in a jframe I have a textarea that is where I want to put the ID or identification of a person .... in the other jframe I have a table with the information of the patients what I want is to search in that jf...
asked by 07.06.2018 / 14:10
1
answer

Why does JPA return the related records in FETCH LAZY?

I'm using JPA and I'm having problems retrieving records from tables that contain foreign keys, my DB is wide but I'll simplify the problem, in a typical REGION - > CITY - > COMUNA REGION Table Primary Key REGION Tabl...
asked by 07.06.2018 / 15:20
1
answer

get pdf from FileOutputStream

I'm doing an application where I create a pdf. I have done it in a way that I created it in a directory (FileOutputStream) but I would like it to be opened through the browser when I click on the link that calls the action that creates it. It's...
asked by 04.06.2018 / 21:30
1
answer

How to send data received with Scanner (input from keyboard) to constructor?

The task I have consists of: Create 3 classes, the first will be superclass and will have 5 attributes that you choose, these will enter from the keyboard using a builder and will show them. In the second class you will have 4 private attr...
asked by 05.06.2018 / 18:10
0
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Question about jTable

A quick question, esque I need you to show me all the records related in a jTable with a plate that I have in a database, I could do it but the problem esque only shows one and I need you to show all I've already tried but always shows me only o...
asked by 06.06.2018 / 01:21
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Error in impirmir report ireport

When I click the generate report button, it flags this error getWriter () has already been called for this response ireport     
asked by 06.06.2018 / 01:41