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// An exception test for JSwat.
// $Id: excptest.java 1141 2004-02-20 03:26:14Z nfiedler $
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.Method;
import javax.swing.*;
public class excptest implements ActionListener {
JButton npeButton;
JButton rteButton;
JButton meButton;
JButton uceButton;
JButton iteButton;
public excptest() {
JFrame fr = new JFrame("exception test");
Container pane = fr.getContentPane();
pane.setLayout(new GridLayout(5, 1));
npeButton = new JButton("Null ptr exception");
pane.add(npeButton);
npeButton.addActionListener(this);
rteButton = new JButton("Runtime Exception w/o msg");
pane.add(rteButton);
rteButton.addActionListener(this);
meButton = new JButton("Exception w/o msg");
pane.add(meButton);
meButton.addActionListener(this);
uceButton = new JButton("Uncaught exception");
pane.add(uceButton);
uceButton.addActionListener(this);
iteButton = new JButton("Invocation exception");
pane.add(iteButton);
iteButton.addActionListener(this);
fr.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
fr.setSize(240, 200);
fr.setVisible(true);
}
public void actionPerformed(ActionEvent ae) {
try {
Object src = ae.getSource();
if (src == npeButton) {
throw new NullPointerException("test exception");
} else if (src == rteButton) {
throw new MyRuntimeException();
} else if (src == meButton) {
throw new MyException();
} else if (src == iteButton) {
Target t = new Target();
Method m = Target.class.getMethod("doIt", null);
Object o = m.invoke(t, null);
System.out.println(o);
} else {
Thread th = new Thread(new Runnable() {
public void run() {
throw new NullPointerException("uncaught exception");
}
});
th.start();
}
} catch (Throwable t) {
System.out.println(t);
if (t.getCause() != null) {
System.out.println("Caused by: " + t.getCause());
}
}
}
public static void main(String[] args) {
new excptest();
}
}
class MyRuntimeException extends RuntimeException {
public String getMessage() {
return null;
}
}
class MyException extends Exception {
public String getMessage() {
return null;
}
}
class Target {
public int doIt() {
// intentionally cause an exception
return 10 / 0;
}
}
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