36 lines
1.0 KiB
Java
36 lines
1.0 KiB
Java
// ui/CheckBoxes.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// Using JCheckBoxes.
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import javax.swing.*;
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import java.awt.*;
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import static onjava.SwingConsole.*;
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public class CheckBoxes extends JFrame {
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private JTextArea t = new JTextArea(6, 15);
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private JCheckBox
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cb1 = new JCheckBox("Check Box 1"),
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cb2 = new JCheckBox("Check Box 2"),
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cb3 = new JCheckBox("Check Box 3");
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public CheckBoxes() {
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cb1.addActionListener(e -> trace("1", cb1));
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cb2.addActionListener(e -> trace("2", cb2));
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cb3.addActionListener(e -> trace("3", cb3));
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setLayout(new FlowLayout());
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add(new JScrollPane(t));
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add(cb1);
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add(cb2);
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add(cb3);
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}
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private void trace(String b, JCheckBox cb) {
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if(cb.isSelected())
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t.append("Box " + b + " Set\n");
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else
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t.append("Box " + b + " Cleared\n");
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}
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public static void main(String[] args) {
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run(new CheckBoxes(), 200, 300);
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}
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}
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