Exception Handling - Java - page 508

only the method main .) There are three possibilities when the code in the try-catch-
finally blocks is run:
1. The try block runs to the end and no exception is thrown. In this case, the finally
block is executed after the try block.
2. An exception is thrown in the try block and is caught in one of the catch blocks
positioned after the try block. In this case, the finally block is executed after the
catch block is executed.
3. An exception is thrown in the try block and there is no matching catch block in
the method to catch the exception. In this case, the method invocation ends and
the exception object is thrown to the enclosing method. However, the finally
block is executed before the method ends. Note that you cannot account for this
last case simply by placing code after the catch blocks.
Self-Test Exercises
27. Can you have a try block and corresponding catch blocks inside another larger
try block?
28. Can you have a try block and corresponding catch blocks inside another larger
catch block?
29. What is the output produced by the following program? What would the out-
put be if the argument to exerciseMethod were − 42 instead of 42 ? (The class
NegativeNumberException is defined in Display 9.8, but you need not review
that definition to do this exercise.)
public class FinallyDemo
{
public static void main(String[] args)
{
try
{
exerciseMethod(42);
}
catch (Exception e)
{
System.out.println("Caught in main.");
}
}
public static void exerciseMethod( int n) throws Exception
{
try
{
if (n > 0)
throw new Exception();
else if (n < 0)
throw new NegativeNumberException();