CoreJava - Exception Handling - Assignment

 

Core Java Assignments - Exception Handling

 1. Divide by Zero Exception:

• Write a Java program that takes two integers as input and divides the first number by the second. Handle the "ArithmeticException" that occurs when dividing by zero.

2. Array Index Out of Bounds Exception:

• Create an array and try to access an element at an index that is out of bounds. Catch and handle the "ArrayIndexOutOfBoundsException."

3. Custom Exception:

• Define a custom exception class, e.g., "NegativeNumberException." Write a program that takes an integer as input and throws this exception if the number is negative.

4. File Handling Exception:

• Write a program that attempts to open a non-existent file for reading using FileReader. Handle the "FileNotFoundException."

5. Multiple Exceptions:

• Write a program that performs various operations (e.g., arithmetic, array access) and handles multiple exceptions like "ArithmeticException" and "ArrayIndexOutOfBoundsException."

6. Nested Exception Handling:

• Create a program with nested try-catch blocks, where an exception thrown in an inner try block is caught and handled in the outer catch block.

7. Finally Block Usage:

• Write a program where you open a resource (e.g., a file) in a try block and close it in the finally block. Ensure the resource is always closed, even if an exception occurs.

8. Propagate Exception:

• Define a method that takes an integer as input and throws an exception if the input is less than 10. Call this method from another method and handle the exception there.

9. Chained Exceptions:

• Create a program that demonstrates the use of chained exceptions (using the initCause method) to provide more context when handling exceptions.

10. Exception Propagation in Threads:

• Write a program that spawns multiple threads, and each thread may throw an exception. Demonstrate how exceptions are propagated in multi-threaded programs.

1.       Create a method that takes two integer arguments and returns their quotient. Handle the exception that occurs if the second argument is zero.

2.       Write a program that reads a file from the user and displays its contents. Handle the exception that occurs if the file is not found.

3.       Create a method that reads a double from the user and returns its square root. Handle the exception that occurs if the input is negative.

4.       Write a program that reads two integers from the user and prints their sum. Handle the exception that occurs if the input is not an integer.

5.       Create a method that takes a string as input and returns its length. Handle the exception that occurs if the input is null.

6.       Write a program that reads a file from the user and writes its contents to a new file. Handle the exceptions that occur if the input file is not found or the output file cannot be created.

7.       Create a method that takes an array of integers and returns the sum of its elements. Handle the exception that occurs if the array is null.

8.       Write a program that reads a number from the user and displays its reciprocal. Handle the exception that occurs if the input is zero.

9.       Create a method that takes a string as input and returns its first character. Handle the exception that occurs if the string is empty.

10.   Write a program that reads a list of integers from the user and prints their average. Handle the exception that occurs if the list is empty.

Write code for the following scenarios :

1.       Bank Account: Create a BankAccount class with a deposit method and a withdraw method that take a double as input. The deposit method should add the input amount to the account balance, and the withdraw method should subtract the input amount from the account balance. Handle the exception that occurs if the withdrawal amount is greater than the account balance.

2.       Password Checker: Create a PasswordChecker class with a checkPassword method that takes a string as input. The method should check if the input string is a valid password by ensuring that it is at least 8 characters long and contains at least one uppercase letter, one lowercase letter, and one digit. Handle the exception that occurs if the input string does not meet these requirements.

3.       File Converter: Create a FileConverter class with a convertFile method that takes two strings as input: the path to the input file and the path to the output file. The method should read the input file, convert its contents to uppercase, and write the result to the output file. Handle the exceptions that occur if the input file is not found or if the output file cannot be created.

4.       Temperature Converter: Create a TemperatureConverter class with a convertToFahrenheit method and a convertToCelsius method that take a double as input. The convertToFahrenheit method should convert the input temperature from Celsius to Fahrenheit, and the convertToCelsius method should convert the input temperature from Fahrenheit to Celsius. Handle the exception that occurs if the input temperature is below absolute zero.

5.       Online Store: Create an OnlineStore class with a checkout method that takes an array of Product objects and a PaymentMethod object as input. The checkout method should calculate the total cost of the products, subtract the payment amount from the total cost, and return the change. Handle the exceptions that occur if the product array is empty or if the payment amount is less than the total cost.