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Comments on JOptionPane doesn't show; application combines Swing and console.

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JOptionPane doesn't show; application combines Swing and console.

+1
−1

What is wrong in the following code:

package oren;
import java.util.Scanner;

import javax.swing.JOptionPane;

public class Main {

	public static void main(String[] args) {
		double x,y,z;
		Scanner scanner = new Scanner(System.in);
		System.out.println("what are the x and y side of the triangle");
		x = scanner.nextDouble();
		scanner.nextLine();
		y = scanner.nextDouble();
		scanner.nextLine();
		scanner.close();
		JOptionPane.showMessageDialog(null, Math.sqrt(x*x + y*y));

		
	}

}

For some reason the JOptionPane.showMessageDialog doesn't show.
However, there are no error messages.
I am using Eclipse and Java 21.

History

2 comment threads

Works with OpenJDK 21 (IntelliJ on Ubuntu) (4 comments)
Errors (2 comments)
Works with OpenJDK 21 (IntelliJ on Ubuntu)
FractionalRadix‭ wrote 4 months ago

I tried this using IntelliJ, with OpenJDK 21. The JOptionPane showed up as expected.
Is it possible that the JOptionPane is hidden behind another window?
You could also try showing the answer in, for example, a JFrame - and see if that makes a difference. Then we might know a little more.

programAngel‭ wrote 4 months ago

you are right. Thank you. That was the problem. it was hidden behind eclipse so it looked to me as if the program stack.

FractionalRadix‭ wrote 4 months ago

You're welcome! I suggest you post this as an answer. Maybe also make the title of the question more descriptive - e.g. "Why does my JOptionPane not show?" That would make the question + answer easier to find for others who have the same problem.

programAngel‭ wrote 4 months ago

done, thank you