//: c13:CheckBox1.java // From 'Thinking in Java, 2nd ed.' by Bruce Eckel // www.BruceEckel.com. See copyright notice in CopyRight.txt. // Using JCheckBoxes. // <applet code=CheckBox1 width=200 height=200> // </applet> import javax.swing.*; import java.awt.event.*; import java.awt.*; import com.bruceeckel.swing.*; public class CheckBox1 extends JApplet { JTextArea t = new JTextArea(6, 15); JCheckBox cb1 = new JCheckBox("Check Box 1"), cb2 = new JCheckBox("Check Box 2"), cb3 = new JCheckBox("Check Box 3"); public void init() { cb1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ trace("1", cb1); } }); cb2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ trace("2", cb2); } }); cb3.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ trace("3", cb3); } }); Container cp = getContentPane(); cp.setLayout(new FlowLayout()); cp.add(new JScrollPane(t)); cp.add(cb1); cp.add(cb2); cp.add(cb3); } void trace(String b, JCheckBox cb) { if(cb.isSelected()) t.append("Box " + b + " Set\n"); else t.append("Box " + b + " Cleared\n"); } public static void main(String[] args) { Console.run(new CheckBox1(), 200, 200); } } ///:~