EXCEPTION HANDLING AND TEXT I/O - Introduction to Java Programming - page 537

perform operations before exits;

throw ex;

}

The statement throw ex rethrows the exception to the caller so that other handlers in the
caller get a chance to process the exception ex .

14.23

✓ ✓

Suppose that statement2 causes an exception in the following statement:

Check

Point

try {
statement1;

statement2;

statement3;

}
catch (Exception1 ex1) {
}
catch (Exception2 ex2) {
throw ex2;

}
finally {
statement4;

}
statement5;

Answer the following questions:

If no exception occurs, will statement4 be executed, and will statement5 be
executed?

■

If the exception is of type Exception1 , will statement4 be executed, and will
statement5 be executed?

■

If the exception is of type Exception2 , will statement4 be executed, and will
statement5 be executed?

■

If the exception is not Exception1 nor Exception2 , will statement4 be exe-
cuted, and will statement5 be executed?

■

14.8 Chained Exceptions
Throwing an exception along with another exception forms a chained exception .

Key
Point

In the preceding section, the catch block rethrows the original exception. Sometimes, you
may need to throw a new exception (with additional information) along with the original
exception. This is called chained exceptions . Listing 14.9 illustrates how to create and throw
chained exceptions.

chained exception

L ISTING 14.9 ChainedExceptionDemo.java
1 public class ChainedExceptionDemo {
2 public static void main(String[] args) {
3 try {
4 method1();
5 }
6 catch (Exception ex) {

7
8 }
9 }
10

ex.printStackTrace(); stack trace