How to Create a Popup Form with Multiple Fields in Java Without JOptionPane.showInputDialog()?

Simple Popup Form with Multiple Fields

Question:

Is there a way to create a popup form with multiple fields without using JOptionPane.showInputDialog()?

Answer:

Consider Using JOptionPane Methods

While using JOptionPane methods may be initially dismissed due to the assumption that it's limited to one line of input, it offers options such as showInputDialog() and showMessageDialog() that can accommodate custom forms.

Alternative Approach

For a highly customized solution, consider the following code:

package gui;

import java.awt.EventQueue;
import java.awt.GridLayout;
import javax.swing.*;

/** @see https://stackoverflow.com/a/3002830/230513 */
class JOptionPaneTest {

    private static void display() {
        String[] items = {"One", "Two", "Three", "Four", "Five"};
        JComboBox<String> combo = new JComboBox<>(items);
        JTextField field1 = new JTextField("1234.56");
        JTextField field2 = new JTextField("9876.54");
        JPanel panel = new JPanel(new GridLayout(0, 1));
        panel.add(combo);
        panel.add(new JLabel("Field 1:"));
        panel.add(field1);
        panel.add(new JLabel("Field 2:"));
        panel.add(field2);
        int result = JOptionPane.showConfirmDialog(null, panel, "Test",
            JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
        if (result == JOptionPane.OK_OPTION) {
            System.out.println(combo.getSelectedItem()
                + " " + field1.getText()
                + " " + field2.getText());
        } else {
            System.out.println("Cancelled");
        }
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                display();
            }
        });
    }
}

Additional Considerations:

• Customizing forms using JOptionPane hinges on the suitability of modality rather than the number of components.
• Focus can be set to specific components by referencing Dialog Focus.

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