OnJava8-Examples/exceptions/RethrowNew.java

// exceptions/RethrowNew.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.
// Rethrow a different object from the one you caught

class OneException extends Exception {
  public OneException(String s) { super(s); }
}

class TwoException extends Exception {
  public TwoException(String s) { super(s); }
}

public class RethrowNew {
  public static void f() throws OneException {
    System.out.println(
      "originating the exception in f()");
    throw new OneException("thrown from f()");
  }
  public static void main(String[] args) {
    try {
      try {
        f();
      } catch(OneException e) {
        System.out.println(
          "Caught in inner try, e.printStackTrace()");
        e.printStackTrace(System.out);
        throw new TwoException("from inner try");
      }
    } catch(TwoException e) {
      System.out.println(
        "Caught in outer try, e.printStackTrace()");
      e.printStackTrace(System.out);
    }
  }
}
/* Output:
originating the exception in f()
Caught in inner try, e.printStackTrace()
OneException: thrown from f()
        at RethrowNew.f(RethrowNew.java:16)
        at RethrowNew.main(RethrowNew.java:21)
Caught in outer try, e.printStackTrace()
TwoException: from inner try
        at RethrowNew.main(RethrowNew.java:26)
*/