Questions tagged as 'java'

Tagged questions
1
answer

How to find out the class that called a method from another class?

I wanted to know if there is any way to get the class that called a method within that method. For example: public class A { public void metodoA() { B.metodoB(); } } public static B { public void metodoB() { //Aqui...
asked by 30.08.2018 / 16:05
1
answer

mysql remote database slow with java swing application

I have a java swing application that is connected to a remote Mysql database, ie on an online server. When I run the program it works fine, except for the slowness of the bank's response. For example, I open the user registration window and i...
asked by 17.09.2015 / 01:59
2
answers

Compile multiple java files in the same folder

I made a very simple Java program, using notepad and compiling by CMD . The problem is that even the files being in the same folder, the class that has the main() method does not compile. The following is the code below: Main class...
asked by 18.09.2015 / 06:55
1
answer

How to create a circle of progress?

I want to make a circle progress like this: In Java, I could only find something about JProgressBar .     
asked by 31.08.2015 / 20:04
1
answer

Predict a result by probability

I would like to know if you have a sequence of 10 numbers to predict the next 10 numbers. These 10 numbers are in a range of 0 to 100. Better explaining the situation: 10 numbers are randomly generated every day. I would like to take the...
asked by 30.03.2015 / 14:27
1
answer

Why does the size of the JFrame exceed the size of its ContentPane, even if it has a defined size?

I noticed a strange behavior between containers in the swing. To exemplify the test, I created a JFrame and a JPanel , and set the panel to contentPane of JFrame . Set the preferred and maximum size of the JPanel t...
asked by 10.05.2017 / 20:00
1
answer

Flashing buttons with Thread

I have a problem trying to make the buttons blink. Using Thread.sleep() , when clicking the button, Thread.sleep() ignores what comes before it, executes sleep and executes only what comes next, in this case setBackgrou...
asked by 28.03.2017 / 20:31
1
answer

JavaSE with CDI and JPA - Error WELD-001303

I am studying JPA and CDI in a Java SE application. When I create the EntityManagerFactory I come across the error: Exception in thread "main" org.jboss.weld.context.ContextNotActiveException: WELD-001303: No active contexts for scope t...
asked by 13.06.2015 / 22:58
3
answers

Calculate age by day, month and year

I'm trying to calculate the age by day, month, and year but I can not. I followed some examples but everyone goes wrong too. For example if the date of birth is 14/06/1992 this method returns 23 years and the correct one would be 22, it w...
asked by 15.06.2015 / 16:25
1
answer

Help with logic

I have a method that reads multiple tags from an .xml file and returns a list populated by the read data. Problem: Each xml file has several batches and inside the batch has several tabs, for example, I have a client named Rodrigo and it is i...
asked by 22.05.2015 / 15:10