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// exceptions/Ex13.java

// TIJ4 Chapter Exceptions, Exercise 13, page 476

/* Modify Exercise 9 by adding a finally clause. Verify that your

* finally clause is executed, even if a NullPointerException is thrown.

*/

import static net.mindview.util.Print.*;

class ExceptionA extends Exception {

ExceptionA(String msg) { super(msg); }

}

class ExceptionB extends Exception {

ExceptionB(String msg) { super(msg); }

}

class ExceptionC extends Exception {

ExceptionC(String msg) { super(msg); }

}

public class Ex13 {

// array element will be initialized to null:

private static Integer[] x = new Integer[1];

public static void f(int x)

throws ExceptionA, ExceptionB, ExceptionC {

if(x < 0) throw new ExceptionA("x < 0");

if(x == 0) throw new ExceptionB("x == 0");

if(x > 0) throw new ExceptionC("x > 0");

}

public static void main(String[] args) {

try {

// to throw NullPointerException:

f(x[0]);

f(0);

f(1);

f(-1);

// will catch any Exception type:

} catch(Exception e) {

print("Caught Exception");

e.printStackTrace(System.out);

} finally {

print("made it to finally");

}

}

}