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// An exception test for JSwat.
// $Author: nfiedler $ $Date: 2002-10-13 00:03:33 -0700 (Sun, 13 Oct 2002) $ $Rev: 604 $
import java.awt.*;
import java.awt.event.*;
public class excptest implements ActionListener {
Button npeButton;
Button nmeButton;
Button uceButton;
Button sizeButton;
Frame fr;
/**
* Tests exception handling.
*/
public excptest(int width, int height) {
fr = new Frame("tester");
fr.setLayout(new GridLayout(4, 1));
npeButton = new Button("Null ptr exception");
fr.add(npeButton);
npeButton.addActionListener(this);
nmeButton = new Button("Exception w/o msg");
fr.add(nmeButton);
nmeButton.addActionListener(this);
uceButton = new Button("Uncaught exception");
fr.add(uceButton);
uceButton.addActionListener(this);
sizeButton = new Button("Window dimensions");
fr.add(sizeButton);
sizeButton.addActionListener(this);
fr.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.out.print("w = ");
System.out.print(fr.getWidth());
System.out.print(", h = ");
System.out.println(fr.getHeight());
System.exit(0);
}
});
fr.setSize(width, height);
fr.show();
}
public void actionPerformed(ActionEvent ae) {
Object src = ae.getSource();
if (src == npeButton) {
throw new NullPointerException("test exception");
} else if (src == sizeButton) {
Insets insets = fr.getInsets();
System.out.print("Insets (t,l,b,r): ");
System.out.print(insets.top);
System.out.print(", ");
System.out.print(insets.left);
System.out.print(", ");
System.out.print(insets.bottom);
System.out.print(", ");
System.out.println(insets.right);
System.out.print("Dimensions (x,y,w,h): ");
System.out.print(fr.getX());
System.out.print(", ");
System.out.print(fr.getY());
System.out.print(", ");
System.out.print(fr.getWidth());
System.out.print(", ");
System.out.println(fr.getHeight());
} else if (src == nmeButton) {
throw new MyException();
} else {
Thread th = new Thread(new Runnable() {
public void run() {
throw new NullPointerException("uncaught exception");
}
});
th.start();
}
}
public static void main(String[] args) {
if (args.length < 2) {
new excptest(200, 200);
} else {
try {
int w = Integer.parseInt(args[0]);
int h = Integer.parseInt(args[1]);
new excptest(w, h);
} catch (NumberFormatException nfe) {
System.err.println("The first two arguments must be "+
"integers, specifying width and height.");
}
}
}
}
class MyException extends RuntimeException {
public String getMessage() {
return null;
}
}
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