// exceptions/ExtraFeatures.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Further embellishment of exception classes

class MyException2 extends Exception {
 private int x;
 MyException2() {}
 MyException2(String msg) { super(msg); }
 MyException2(String msg, int x) {
 super(msg);
 this.x = x;
 }
 public int val() { return x; }
 @Override
 public String getMessage() {
 return "Detail Message: "+ x
 + " "+ super.getMessage();
 }
}

public class ExtraFeatures {
 public static void f() throws MyException2 {
 System.out.println(
 "Throwing MyException2 from f()");
 throw new MyException2();
 }
 public static void g() throws MyException2 {
 System.out.println(
 "Throwing MyException2 from g()");
 throw new MyException2("Originated in g()");
 }
 public static void h() throws MyException2 {
 System.out.println(
 "Throwing MyException2 from h()");
 throw new MyException2("Originated in h()", 47);
 }
 public static void main(String[] args) {
 try {
 f();
 } catch(MyException2 e) {
 e.printStackTrace(System.out);
 }
 try {
 g();
 } catch(MyException2 e) {
 e.printStackTrace(System.out);
 }
 try {
 h();
 } catch(MyException2 e) {
 e.printStackTrace(System.out);
 System.out.println("e.val() = " + e.val());
 }
 }
}
/* Output:
Throwing MyException2 from f()
MyException2: Detail Message: 0 null
 at ExtraFeatures.f(ExtraFeatures.java:24)
 at ExtraFeatures.main(ExtraFeatures.java:38)
Throwing MyException2 from g()
MyException2: Detail Message: 0 Originated in g()
 at ExtraFeatures.g(ExtraFeatures.java:29)
 at ExtraFeatures.main(ExtraFeatures.java:43)
Throwing MyException2 from h()
MyException2: Detail Message: 47 Originated in h()
 at ExtraFeatures.h(ExtraFeatures.java:34)
 at ExtraFeatures.main(ExtraFeatures.java:48)
e.val() = 47
*/