Final Lab Sheet: Introduction to Java Programming

Lab Practical 1: Introduction to Java Programming

Objective: Write a simple Java program to print "Hello, World!" and compile/run it using the command line.
Task:

1. Write a Java program that prints "Hello, World!".

2. Compile and run it using javac and java commands.

3. Modify the program to print your name in the next line.

Lab Practical 2: Using an IDE (IntelliJ/Eclipse)

Objective: Familiarise with an IDE by creating and running a Java project.
Task:

1. Create a new Java project in IntelliJ/Eclipse.

2. Write a program that calculates the sum of two numbers (5 and 7) and prints the result.

3. Debug the program by setting a breakpoint and inspecting variables.

Lab Practical 3: Variables and Data Types

Objective: Demonstrate understanding of Java variables and data types.
Task:

1. Declare variables to store:

   • Your age (int),

   • Your height in meters (double),

   • Your first initial (char),

   • Whether you are a student (boolean).

2. Print all variables with descriptive messages (e.g., "My age is 20").

Lab Practical 4: Expressions and Operators

Objective: Use arithmetic and logical operators in Java.
Task:

1. Write a program that calculates the area of a rectangle (length = 5.5, width = 3.2).

2. Check if a number (input) is even or odd using the modulus operator.

3. Swap two numbers without a temporary variable.

Lab Practical 5: Control Statements (If-Else, Switch)

Objective: Implement decision-making in Java.
Task:

1. Write a program that checks if a number is positive, negative, or zero.

2. Use a switch statement to print the day of the week based on a number (1-7).

3. Determine the largest of three numbers using nested if-else.

Lab Practical 6: Loops (For, While, Do-While)

Objective: Use loops for repetitive tasks.
Task:

1. Print numbers from 1 to 10 using a for loop.

2. Calculate the factorial of a number (e.g., 5! = 120) using a while loop.

3. Print all even numbers between 1 and 20 using a do-while loop.

Lab Practical 7: Arrays

Objective: Work with single and multi-dimensional arrays.
Task:

1. Create an array of 5 integers and find the sum of all elements.

2. Find the largest number in an array.

3. Transpose a 2x3 matrix (hardcoded values).

Lab Practical 8: Methods and Parameter Passing

Objective: Write reusable methods in Java.
Task:

1. Create a method isPrime() that checks if a number is prime.

2. Write a method calculateCircleArea() that takes radius as input and returns the area.

3. Overload a method print() to accept int, String, and double parameters.

Lab Practical 9: Exception Handling

Objective: Handle runtime errors using try-catch blocks.
Task:

1. Write a program that divides two numbers and handles ArithmeticException.

2. Use try-catch to handle ArrayIndexOutOfBoundsException when accessing an array.

3. Throw a custom exception if a user enters a negative number.

Lab Practical 10: Classes and Objects

Objective: Implement OOP concepts in Java.
Task:

1. Create a Student class with fields (name, rollNo, grade) and methods to display details.

2. Add a constructor to initialize the object.

3. Use access modifiers (private, public) and provide getter/setter methods.