JOptionPane Display Difficulties

[kewlgeye]

Hello to all

I am trying to practice with arrays and GUI's using joptionpanes or boxes as well.

I am having difficulty with viewing the resulting windows. If you enter 5 as the size of the array then the window should print 5 4 3 2 1 in the messagebox but instead it freezes after I enter 5 and nothing happens, also if I just use the CMD to deliver the message "Please enter the size of the array: " then it works but I have to select ok 5 seperate times for each number instead of one box displaying 5 4 3 2 1.

How can I fix this. Here is the code that I made

Code:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.JOptionPane;

public class array{
	static Scanner console = new Scanner(System.in);
	JFrame frame;
  
public array(){
	frame = new JFrame("Array");
	JButton button = new JButton("Enter Here");
	button.addActionListener(new MyAction());
	frame.add(button);
	frame.setSize(400, 400);
	frame.setVisible(true);
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}


public class MyAction implements ActionListener{
	public void actionPerformed(ActionEvent e){
		JOptionPane.showInputDialog(null, "" + "Enter the size of the array: ");
		int arraySize;
		arraySize = console.nextInt();	
		int[] list = new int[arraySize];
		for (arraySize = 0; arraySize < list.length; arraySize++)
		if (arraySize == 0) continue;
		else
		JOptionPane.showMessageDialog(frame, "" + arraySize + " " +
		"is your number", "Your Silly Numbers", 
		JOptionPane.INFORMATION_MESSAGE);
		JOptionPane.showMessageDialog(frame, "" + list.length + " " +
		"is your number", "Your Silly Numbers", 
		JOptionPane.INFORMATION_MESSAGE);
		
	}
}


public static void main(String[] args){
    array db = new array();
	}
}

[hardwired]

This blocks input at the console

Code:

int arraySize = console.nextInt();

Code:

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;

public class AnArrayTest {
    Scanner console = new Scanner(System.in);
    JFrame frame;
  
    public AnArrayTest() {
        frame = new JFrame("Array");
        JButton button = new JButton("Enter Here");
        button.addActionListener(new MyAction());
        JPanel panel = new JPanel();
        panel.add(button);
        frame.add(panel);
        frame.setSize(400, 400);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public class MyAction implements ActionListener{
        public void actionPerformed(ActionEvent e){
            String input = JOptionPane.showInputDialog(null,
                                      "Enter the size of the array: ");
            int arraySize = //console.nextInt();
                            Integer.parseInt(input.trim());
            int[] list = new int[arraySize];
            for (int arrayIndex = 0; arrayIndex < list.length; arrayIndex++) {
                list[arrayIndex] = arraySize - arrayIndex;
            }
            String values = Arrays.toString(list);
            JOptionPane.showMessageDialog(frame, values + " " +
                                  "is your number", "Your Silly Numbers", 
                                   JOptionPane.INFORMATION_MESSAGE);
            }
        }

    public static void main(String[] args){
        new AnArrayTest();
    }
}

[kewlgeye]

Thank you this worked well. i understand everything you did except this statement in the code

String values = Arrays.toString(list);

Also can I get the lines to print after 45 numbers on a new line. I am going to look this up and if I figure it out before someone posts I will post my findings.

Thanks

[kewlgeye]

This is what I changed. it compiles, but I am still not able to start a new line after 40 numbers show.

Code:

public class MyAction implements ActionListener{
        public void actionPerformed(ActionEvent e){
            String input = JOptionPane.showInputDialog(null,
                                      "Enter the size of the array: ");
            int arraySize = //console.nextInt();
                            Integer.parseInt(input.trim());
            int[] list = new int[arraySize];
            for (int arrayIndex = 0; arrayIndex < list.length; arrayIndex++){
	    list[arrayIndex] = arraySize - arrayIndex;}

            values = Arrays.toString(list);
	    if ((arraySize - 0 + 1) % 40 != 0)

            JOptionPane.showMessageDialog(frame, values + " " +
                                  "are your numbers", "Your Silly Numbers", 
                                   JOptionPane.INFORMATION_MESSAGE);

            }
        }

[Eranga]

Quote:

Originally Posted by kewlgeye

String values = Arrays.toString(list);

It's the string representation of the array specified.

[Eranga]

Ok, everything is start from the user input size. Say the input is 45. What you want to do is, display 40 in one line and remain 5 is in the next line.

You try it in some way, what you want to do is do the same process for different sizes. Got it?

[kewlgeye]

if ((arraySize - 0 + 1) % 40 != 0)


This is the only thing that I know how to do in order to accomplish my goal. I read this off of a site, that is the if statement above.
I don't know how to get it to print to the next line after 40 number. I thought that the statement above did this and my placement of it was ok. This is where I need help. Either showing me, or a link that shows how to accomplish this within a JOptionPaneShowMessage window.

[hardwired]

"arraySize" is a constant.

Code:

            int arraySize = Integer.parseInt(input.trim());
            int[] list = new int[arraySize];
            for (int i = 0; i < list.length; i++) {
                list[i] = i+1;
            }
            String values = "";
            for(int i = 0; i < list.length; i++) {
                values += list[i];
                if(i < list.length-1)
                    values += ", ";
                if((i + 1) % 40 == 0)
                    values += "\n";
            }
            JOptionPane.showMessageDialog(frame, values + " " +...