?? checkboxtest.java
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/**
* @version 1.20 27 Jun 1998
* @author Cay Horstmann
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class CheckBoxFrame extends JFrame
implements ActionListener
{ public CheckBoxFrame()
{ setTitle("CheckBoxTest");
setSize(300, 200);
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);
}
} );
JPanel p = new JPanel();
bold = addCheckBox(p, "Bold");
italic = addCheckBox(p, "Italic");
getContentPane().add(p, "South");
panel = new CheckBoxTestPanel();
getContentPane().add(panel, "Center");
}
public JCheckBox addCheckBox(JPanel p, String name)
{ JCheckBox c = new JCheckBox(name);
c.addActionListener(this);
p.add(c);
return c;
}
public void actionPerformed(ActionEvent evt)
{ int m = (bold.isSelected() ? Font.BOLD : 0)
+ (italic.isSelected() ? Font.ITALIC : 0);
panel.setFont(m);
}
private CheckBoxTestPanel panel;
private JCheckBox bold;
private JCheckBox italic;
}
class CheckBoxTestPanel extends JPanel
{ public CheckBoxTestPanel()
{ setFont(Font.PLAIN);
}
public void setFont(int m)
{ setFont(new Font("SansSerif", m, 12));
repaint();
}
public void paintComponent(Graphics g)
{ super.paintComponent(g);
g.drawString
("The quick brown fox jumps over the lazy dog.",
0, 50);
}
}
public class CheckBoxTest
{ public static void main(String[] args)
{ JFrame frame = new CheckBoxFrame();
frame.show();
}
}
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