Questions tagged as 'java'

Tagged questions
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Java returning 0 in multiplication

The code is even simple to calculate the income of a vendor but in the multiplication in the case of 150000 * 0.1 it returns 0 code / public class FuncionarioComissionado { //Strings private para poder usar Get/Set //Atributos privat...
asked by 07.10.2018 / 01:44
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Implementing the Life Cycle of an Activity

Hello. I'm new to Android Development and would like to better understand how to build more robust applications for this platform. I understand how the life cycle of a Activity works but I wanted to understand how to structure my applicat...
asked by 08.10.2018 / 09:49
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JPA Error with MySQL 8

Hello, After updating my database, my application has been displaying exceptions of type java.sql.SQLSyntaxErrorException . The class below is the one it complains about, saying it does not exist when hibernate tries to create it. @Enti...
asked by 31.08.2018 / 15:52
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Break and Continue on Switch

What's the difference between using break and continue within switch ?     
asked by 30.07.2018 / 02:22
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How to get the value of a particular listview item java android

As I get the value of a certain item (TextView) from the listview. I'm trying something like this: public void onItemClick(AdapterView<?> a, View v, int position, long id) { Object obj =a.getItemAtPosition(position); String mensagem...
asked by 12.06.2014 / 03:12
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How is the super signature function checked

The super() function is for calling the parent constructor and checking for proper signatures. public class Pessoa { private String nome; private String endereco; private String telefone; private String cpf; private...
asked by 23.02.2017 / 02:28
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Learning to use ENUM in Java

Good afternoon. I'm learning how to use enum types in Java and experiencing some problems. First, I created my enum as follows: public enum enumUpdateAction { NEW(0), CHANGE(1), DELETE(2), DELETE_THRU(3), DELETE_FROM(4)...
asked by 24.02.2017 / 18:04
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Map returning repeated values

I am making a foreach in hashmap based on the following arquivo.txt : chaveA;6 chaveA;4 chaveB;3 chaveB;7 chaveC;1 chaveC;1 chaveD;5 For the time being my code looks like this: Scanner scanArquivo = new Scanner(new Fil...
asked by 30.12.2018 / 19:22
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Reorder position in a sequence via MySQL

I have a table of Chamados . I have to add an entire column that will be called sequencia and it will be used to search the order that the user wants. Just to illustrate: the call will have arrows, when you click the arrow pointi...
asked by 05.09.2014 / 16:07
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How to identify in the code the method or command to display a list of data in NavigationView?

I found this code in hithub on an embroidery viewer follows the project link , I tried to search this app where method or command is invoked to display this list of data follows screen prints to exemplify.   I would like to know w...
asked by 22.05.2018 / 19:25