Java Programming Fundamentals

Slide 1: Introduction to Java

Title: Java: An Introduction
Content:

• Java is a high-level, object-oriented programming language.
• It was developed by Sun Microsystems in 1995.
• Write Once, Run Anywhere (WORA) capability.
• Applications include web, mobile, desktop, and enterprise development.

Slide 2: Key Features of Java

Title: Features of Java
Content:

• Platform Independence
• Object-Oriented
• Secure and Robust
• Multithreaded
• High Performance (JIT Compiler)
• Extensive Standard Library (Java API)

Slide 3: Structure of a Java Program

Title: Basic Structure of a Java Program
Content:

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

Key Points:

• class keyword declares a class.
• main method is the entry point of the program.
• System.out.println prints to the console.

Slide 4: Variables and Data Types

Title: Java Variables and Data Types
Content:

• Variables: Containers for storing data.
• Data Types:
  • Primitive: int, double, char, boolean, etc.
  • Non-primitive: Strings, Arrays, Objects. Example:

int age = 25;
String name = "John";
boolean isStudent = true;

Slide 5: Control Flow Statements

Title: Control Flow in Java
Content:

• Conditional Statements: if, if-else, switch.
• Loops: for, while, do-while. Example:

if (age > 18) {
    System.out.println("Adult");
} else {
    System.out.println("Minor");
}

for (int i = 0; i < 5; i++) {
    System.out.println("Iteration: " + i);
}

Slide 6: Object-Oriented Programming (OOP)

Title: OOP Concepts in Java
Content:

• Encapsulation: Wrapping data and code together.
• Inheritance: Acquiring properties from another class.
• Polymorphism: Ability to take many forms.
• Abstraction: Hiding complex implementation details. Example:

class Animal {
    void sound() {
        System.out.println("Animal makes a sound");
    }
}

class Dog extends Animal {
    @Override
    void sound() {
        System.out.println("Dog barks");
    }
}

public class Main {
    public static void main(String[] args) {
        Animal myDog = new Dog();
        myDog.sound();
    }
}

Slide 7: Exception Handling

Title: Handling Errors in Java
Content:

• try-catch block to handle exceptions.
• finally block for cleanup code. Example:

try {
    int result = 10 / 0; // This will throw ArithmeticException
} catch (ArithmeticException e) {
    System.out.println("Cannot divide by zero");
} finally {
    System.out.println("End of program");
}

Slide 8: Practice Activity

Title: Let’s Practice!
Content:

1. Write a Java program to calculate the sum of numbers from 1 to 100.
2. Create a class called Calculator with methods for addition and subtraction.
3. Handle an exception for dividing a number by zero.

Slide 9: Summary

Title: What We Learned Today
Content:

• Java Basics and Features.
• How to write and execute a simple Java program.
• Variables, Data Types, and Control Flow.
• Key OOP principles.
• Exception Handling.

Slide 10: Q&A

Title: Questions and Answers
Content: Feel free to ask any questions! Let’s discuss and clarify any doubts you have about Java.