Questions tagged as 'java'

Tagged questions
4
answers

Hibernate - How to fetch all rows from a table with Hibernate?

I'm not able to fetch all rows from a table with Hibernate. Does anyone know the name of the method that does this?     
asked by 05.07.2018 / 18:53
1
answer

Error message after opening an Excel file generated by an application

I have an application that reads a xml file, takes the data and passes it to a file in xls format. But when I open the file that was gerardo the following message appears: Would anyone explain the cause of this error?    ...
asked by 24.07.2015 / 13:52
1
answer

Images loaded in ListView are randomly exchanged

I've implemented a ListView where an external image is populated in each position, but when I scroll on the screen the images change randomly. This video shows exactly what happens: link Note: There should be no duplicate images in the L...
asked by 22.07.2015 / 17:44
2
answers

How to make a String presentable in this format yyyy-mm-dd HH: mm: ss.fff

I have a date that is a return of the database that comes in this format yyyy-mm-dd HH:mm:ss.fff , how can I turn it into dd-mm-yyyy HH:mm Example: My date is like this: 2015-01-16 07:49:45.0 and I want to leave it this wa...
asked by 05.06.2015 / 19:18
1
answer

Java - What to do when JSON can come in Double and Long?

I'm using a WeatherTime API. When I get the weather data from a city via JSON I get the temperature as follows: clima.setTemperatura((Long) dataNode.get("temperature")) However, in the API documentation, when I use get ("temperature") it...
asked by 21.06.2018 / 02:27
1
answer

A doubt with HashMap

I made a simple code to register a person with a HashMap . Pessoa is a class that has name and age, but is not giving to register more than one person. Whenever I'm going to show it, it shows only the first one I registered. My...
asked by 21.06.2018 / 04:43
1
answer

How to remove add / remove panel according to checkbox selection?

I'm adding a panel at the bottom of a JFrame , when a checkbox is selected, and when I unmark it, remove the panel, and leave only the checkbox, however, I'm not getting it, I think the manager layout is preventing the effect I want...
asked by 24.06.2018 / 21:05
2
answers

Search is not performed after connecting to the Java database

I'm trying to search the database using the code in java, but I can not. The database is connected, but the search is not performed. I created two classes, one that owns the class with the connection method, and the other, which is the main one....
asked by 27.07.2018 / 16:02
5
answers

How to get images on the internet through Java?

I am very new to Java and I need to get some images from the internet to insert in my project (there are 5 images). Here are sample links: www.tempoagr / temp / irati / temp1 www.tempoagr / temp / irati / temp2 www.tempoagr / temp / irat...
asked by 29.01.2014 / 15:00
3
answers

Error "" AWT-EventQueue-0 "java.lang.StringIndexOutOfBoundsException: String index out of range: 0" in Java when trying to make IF

I'm doing a condition in running a search in Java, what happens is that I can not have whitespace, asterisk (*) or question mark (?) as the first character of the search. But Java is returning the following error when I leave the field blank:...
asked by 20.03.2014 / 12:42