Demonstrates JoptionPane : OptionPane « Swing JFC « Java

Demonstrates JoptionPane

Demonstrates JoptionPane
// :
// Demonstrates JoptionPane.
// <applet code=MessageBoxes width=200 height=150></applet>
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// See copyright notice in CopyRight.txt.

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

public class MessageBoxes extends JApplet {
  private JButton[] b = { new JButton("Alert"), new JButton("Yes/No"),
      new JButton("Color"), new JButton("Input"), new JButton("3 Vals") };

  private JTextField txt = new JTextField(15);

  private ActionListener al = new ActionListener() {
    public void actionPerformed(ActionEvent e) {
      String id = ((JButton) e.getSource()).getText();
      if (id.equals("Alert"))
        JOptionPane.showMessageDialog(null, "There's a bug on you!",
            "Hey!", JOptionPane.ERROR_MESSAGE);
      else if (id.equals("Yes/No"))
        JOptionPane.showConfirmDialog(null, "or no", "choose yes",
      else if (id.equals("Color")) {
        Object[] options = { "Red", "Green" };
        int sel = JOptionPane.showOptionDialog(null, "Choose a Color!",
            "Warning", JOptionPane.DEFAULT_OPTION,
            JOptionPane.WARNING_MESSAGE, null, options, options[0]);
        if (sel != JOptionPane.CLOSED_OPTION)
          txt.setText("Color Selected: " + options[sel]);
      } else if (id.equals("Input")) {
        String val = JOptionPane
            .showInputDialog("How many fingers do you see?");
      } else if (id.equals("3 Vals")) {
        Object[] selections = { "First", "Second", "Third" };
        Object val = JOptionPane.showInputDialog(null, "Choose one",
            "Input", JOptionPane.INFORMATION_MESSAGE, null,
            selections, selections[0]);
        if (val != null)

  public void init() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    for (int i = 0; i < b.length; i++) {

  public static void main(String[] args) {
    run(new MessageBoxes(), 200, 200);

  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setSize(width, height);
} ///:~


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