rethrownew.java

thinking in java 书中源码 第四版

//: exceptions/RethrowNew.java
// Rethrow a different object from the one that was 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:15)
        at RethrowNew.main(RethrowNew.java:20)
Caught in outer try, e.printStackTrace()
TwoException: from inner try
        at RethrowNew.main(RethrowNew.java:25)
*///:~