05_Exception_Handling

Packages & Interfaces

This section teaches you how to organize code using packages and how to work with interfaces to achieve abstraction.

Topics Covered:

1. Packages - Grouping related classes together.
2. Access Protection - How access modifiers affect package visibility.
3. Interfaces - Defining contracts without implementation.

Example Programs:

• PackageDemo.java - Show how to create and use a package.
• StackInterface.java - Implement stack using an interface.

Exercises:

1. Write a program showing the usage of a package.
2. Write a program to implement a stack using an interface.

Now, move on to Exception Handling.

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Files

• TryCatchDemo.java: Demonstrates try, catch, throw, throws, and finally.
• UserDefinedException.java: Demonstrates user-defined exceptions.
• VoterAgeCheck.java: Throws exception if age is less than 18.
• StackException.java: Throws exception if stack is full or empty.
• BankBalanceException.java: Throws exception if bank balance drops below 1000.
• SavingsAccount.java: Demonstrates exception handling in banking operations.