Control Close Event

public PrintByeBeforeClose() {
Runtime.getRuntime().addShutdownHook(new Thread() {
public void run() {
System.out.println("\nBye bye");
try {
new java.io.File("ff").createNewFile();
} catch (Exception e ) {}
}
});
for (int i = 0; i < 100000; i++) {
System.out.print(i+" ");
try {
Thread.sleep(100);
} catch(InterruptedException e) {}
}
}
public static void main(String[] args) {
new PrintByeBeforeClose();
}
}

public class PrintByeBeforeClose {