[Q#789517][A#790224] Java - How to create a custom dialog box?

https://stackoverflow.com/q/789517

I have a button on a JFrame that when clicked I want a dialog box to popup with multiple text areas for user input. I have been looking all around to try to figure out how to do this but I keep on getting more confused. Can anyone help?

Answer

https://stackoverflow.com/a/790224

If you don't need much in the way of custom behavior, JOptionPane is a good time saver. It takes care of the placement and localization of OK / Cancel options, and is a quick-and-dirty way to show a custom dialog without needing to define your own classes. Most of the time the "message" parameter in JOptionPane is a String, but you can pass in a JComponent or array of JComponents as well. Example:

APIzation

JTextField firstName = new JTextField();
JTextField lastName = new JTextField();
JPasswordField password = new JPasswordField();
final JComponent[] inputs = new JComponent[] {
        new JLabel("First"),
        firstName,
        new JLabel("Last"),
        lastName,
        new JLabel("Password"),
        password
};
int result = JOptionPane.showConfirmDialog(null, inputs, "My custom dialog", JOptionPane.PLAIN_MESSAGE);
if (result == JOptionPane.OK_OPTION) {
    System.out.println("You entered " +
            firstName.getText() + ", " +
            lastName.getText() + ", " +
            password.getText());
} else {
    System.out.println("User canceled / closed the dialog, result = " + result);
}

package com.stackoverflow.api;

import javax.swing.*;

public class Human790224 {

  public static int enterUserData() {
    JTextField firstName = new JTextField();
    JTextField lastName = new JTextField();
    JPasswordField password = new JPasswordField();
    final JComponent[] inputs = new JComponent[] {
      new JLabel("First"),
      firstName,
      new JLabel("Last"),
      lastName,
      new JLabel("Password"),
      password,
    };
    int result = JOptionPane.showConfirmDialog(
      null,
      inputs,
      "My custom dialog",
      JOptionPane.PLAIN_MESSAGE
    );
    if (result == JOptionPane.OK_OPTION) {
      System.out.println(
        "You entered " +
        firstName.getText() +
        ", " +
        lastName.getText() +
        ", " +
        password.getText()
      );
    } else {
      System.out.println(
        "User canceled / closed the dialog, result = " + result
      );
    }

    return result;
  }
}

package com.stackoverflow.api;

import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

/**
 * Java - How to create a custom dialog box?
 *
 * @author APIzator
 * @see <a href="https://stackoverflow.com/a/790224">https://stackoverflow.com/a/790224</a>
 */
public class APIzator790224 {

  public static void createBox() throws Exception {
    JTextField firstName = new JTextField();
    JTextField lastName = new JTextField();
    JPasswordField password = new JPasswordField();
    final JComponent[] inputs = new JComponent[] {
      new JLabel("First"),
      firstName,
      new JLabel("Last"),
      lastName,
      new JLabel("Password"),
      password,
    };
    int result = JOptionPane.showConfirmDialog(
      null,
      inputs,
      "My custom dialog",
      JOptionPane.PLAIN_MESSAGE
    );
    if (result == JOptionPane.OK_OPTION) {
      System.out.println(
        "You entered " +
        firstName.getText() +
        ", " +
        lastName.getText() +
        ", " +
        password.getText()
      );
    } else {
      System.out.println(
        "User canceled / closed the dialog, result = " + result
      );
    }
  }
}