// exceptions/Rethrowing.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.
// Demonstrating fillInStackTrace()

public class Rethrowing {
 public static void f() throws Exception {
 System.out.println(
 "originating the exception in f()");
 throw new Exception("thrown from f()");
 }
 public static void g() throws Exception {
 try {
 f();
 } catch(Exception e) {
 System.out.println(
 "Inside g(), e.printStackTrace()");
 e.printStackTrace(System.out);
 throw e;
 }
 }
 public static void h() throws Exception {
 try {
 f();
 } catch(Exception e) {
 System.out.println(
 "Inside h(), e.printStackTrace()");
 e.printStackTrace(System.out);
 throw (Exception)e.fillInStackTrace();
 }
 }
 public static void main(String[] args) {
 try {
 g();
 } catch(Exception e) {
 System.out.println("main: printStackTrace()");
 e.printStackTrace(System.out);
 }
 try {
 h();
 } catch(Exception e) {
 System.out.println("main: printStackTrace()");
 e.printStackTrace(System.out);
 }
 }
}
/* Output:
originating the exception in f()
Inside g(), e.printStackTrace()
java.lang.Exception: thrown from f()
 at Rethrowing.f(Rethrowing.java:8)
 at Rethrowing.g(Rethrowing.java:12)
 at Rethrowing.main(Rethrowing.java:32)
main: printStackTrace()
java.lang.Exception: thrown from f()
 at Rethrowing.f(Rethrowing.java:8)
 at Rethrowing.g(Rethrowing.java:12)
 at Rethrowing.main(Rethrowing.java:32)
originating the exception in f()
Inside h(), e.printStackTrace()
java.lang.Exception: thrown from f()
 at Rethrowing.f(Rethrowing.java:8)
 at Rethrowing.h(Rethrowing.java:22)
 at Rethrowing.main(Rethrowing.java:38)
main: printStackTrace()
java.lang.Exception: thrown from f()
 at Rethrowing.h(Rethrowing.java:27)
 at Rethrowing.main(Rethrowing.java:38)
*/