Questions tagged as 'java'

Tagged questions
1
answer

@joincolunm with foreignKey hibernate

Hello, I wanted to make a foreign key, but I do not understand the syntax. In the Address class: @Embeddable @Table(name = "tab_endereco") public class Endereco { @Column(length = 40, nullable = false) private String logradouro; @Column(l...
asked by 26.05.2018 / 03:44
1
answer

Get element in ArrayList

I'm having a problem with the line: lista p = lista.get(i); You do not want to get the element. Look at the method below: private void verPessoas() { ArrayList<RespostasAguaCasa> lista = new Read().getLista(); fo...
asked by 26.05.2018 / 20:50
1
answer

The operator + is undefined for the argument type (s) CharSequence, int

I am trying to concatenate a text in% with% with% with%, but java warns that it is not possible to do this by saying:    The operator + is undefined for the argument type (s) CharSequence, int I have already tried to remove the casting...
asked by 09.07.2018 / 19:58
1
answer

How to use LinkedHashSet to implement this IHashSet interface?

How to use LinkedHashSet implementing the interface IHashSet using thread to resolve conflicts and with load factor 0.75? //Usando essa interface public interface IHashSet{ public void put(Object data); public boolean contains(...
asked by 19.07.2018 / 20:49
2
answers

While ResultSet.next () returning only one result

I have a problem, when I put the ResultSet.next() in while and I get the information in the Database column it returns only one result. People table: Pessoas: Idade: Marcos 22 Marcos 24 Marcos 25 Robe...
asked by 20.07.2018 / 21:12
3
answers

MySQL printing multiple times

I'm having a problem printing the MySQL data in Eclipse. When I put to print the list of the registered data it is printing 3 times each information. I know where the problem is, but I can not see the solution. My database has a schema and...
asked by 24.07.2018 / 03:06
1
answer

How to do the query select and call the connection on dao

I need help to structure my dao, how do I call the connection, how do I select within the function, and how do I list in my main the information that comes from select. As it is now: Connection to the bank. package Modal; import java.sq...
asked by 15.05.2018 / 18:39
2
answers

Doubt about consuming backend with Spring [closed]

Good morning, I want to start a Spring project with ionic, my goal is to publish the ionic app in the Google store and consume the backend with Springboot, I know you have to consume this backend by Heroku. But I would like to know if uplo...
asked by 14.05.2018 / 14:48
2
answers

Save data in an Activity when changing Activity

The program is a counter, by clicking the + button it adds +1 to the cont1 variable ... cont2 ..., I want it when I click on the report and I go back to this page, the data I added to the variable to be there Always when I click on the report an...
asked by 12.05.2018 / 23:02
1
answer

Add a vowel at a time in a TextView

I have 5 buttons that emulate vowels, how does each button add a vowel at a time to a viewer, set to TextView ?     
asked by 13.05.2018 / 12:31