Questions tagged as 'java'

Tagged questions
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Is it possible to display notifications with custom icon in Windows 10 with Java?

I know how to do this kind of notifications: But it turns out that it only changes the icon when changing the message type: trayIcon.displayMessage("Titulo", "Contenido", TrayIcon.MessageType.INFO); It's the only thing I could find...
asked by 21.10.2018 / 04:57
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REST Jersey + jackson servlet parsea part of the json as a JsonObject

I am receiving a JSON that jersey + jackson parse it directly on the object that will contain the information. The thing is, I want part of that JSON to be saved as a JSONObject or JSONArray . This would be the JSON that is received, {...
asked by 16.10.2018 / 11:49
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How to use an interface with polymorphic parameters

I have a question about interfaces and their use, first I tell them about my problem I have to build a system in which I have actions from 1 to 10, each action has individual properties, that is they are different objects Here is an examp...
asked by 09.12.2016 / 23:30
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How to add a matrix n x n using threads (Thread)?

I want to know how to add a square matrix n x n using java threads and I did it with a fixed matrix of 2 x 2 but I can not think of doing it with a matrix of n x n. //Clase Suma public class Suma extends Thread { private int n1; private int...
asked by 23.12.2016 / 22:50
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Select in java MySQL

I do a function to verify if a plate exists in a table: 0 if it does not exist and 1 if it was found. However, I do not understand why I still know that there is, when I only have one record in the table public int buscarplaca(String placa)...
asked by 20.12.2016 / 01:55
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Export JTable with header to Excel

I would like to know how I can do so that when exporting a table to Excel from Java , I can include a header such as my company name or something like that. I can export the table without problems, but I do not know how to put a header, or at...
asked by 30.12.2016 / 02:58
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Doubt treeMap in Java

I would like to know if when I make a list treemap of objects Producto which has byproducts in inheritance type: ProductoA ProductoB Could you just show the ProductoA ? This is how I believe it: public Cataleg(){...
asked by 11.01.2017 / 16:44
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WebView - Error loading some Web's

When I put this link: link What is a web that allows you to update the online text in my application without having to edit the App. But I always get an error: "We are trying to connect to the server." if I use for example Google if i...
asked by 09.01.2017 / 21:16
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Problem with assertEquals

I have problems with some tests that I am going through, specifically with "assertEquals" I'm really comparing two "user" objects that have 3 parameters "username, password, fullname" In the tests I do this: public void loginUser() {...
asked by 13.11.2016 / 13:21
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Error reading an .sql file

Good evening Community. I have a program in java, which I pass as an argument the authors.sql file (database in postgresql) which contains a single line: INSERT INTO authors VALUES ('CEVA', 'K.', 'Cherteston') At the moment of reading th...
asked by 29.10.2016 / 01:52