Java, A Beginner's Guide, 5th Edition, 5th Edition

Try Blocks Can Be Nested

One try block can be nested within another. An exception generated within the inner try block that is not caught by a catch associated with that try is propagated to the outer try block. For example, here the ArrayIndexOutOfBoundsException is not caught by the inner catch, but by the outer catch:

In this example, an exception that can be handled by the inner try—in this case, a divide-by-zero error—allows the program to continue. However, an array boundary error is caught by the outer try, which causes the program to terminate. ...