Java 7 for Absolute Beginners

CHAPTER 7 ■ WRITING A USER INTERFACE

Listing 7-3. A more complex Swing program

package com.apress.java7forabsolutebeginners.examples.swingdemo;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;

public class SwingDemo implements ActionListener, MouseListener {

private JFrame frame = new JFrame("SwingDemo");
private JPanel panel = new JPanel();
private JButton sayButton = new JButton("I say!");
private JLabel sayLabel = new JLabel("Say something:");
private JTextArea sayText = new JTextArea();

private void addMenu(JFrame frame) {
JMenu file = new JMenu("File");
file.setMnemonic('F');
JMenuItem exitItem = new JMenuItem("Exit");
exitItem.setMnemonic('x');
exitItem.addActionListener(this);
file.add(exitItem);
JMenuBar menuBar = new JMenuBar();
menuBar.add(file);
frame.setJMenuBar(menuBar);
}

private void arrangeComponents(JFrame frame) {
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
sayText.setPreferredSize(new Dimension(200, 50));
sayText.setAlignmentX(Component.CENTER_ALIGNMENT);
sayLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
sayButton.setAlignmentX(Component.CENTER_ALIGNMENT);
sayButton.addMouseListener(this);
panel.add(sayLabel);
panel.add(sayText);