Is lesson me hum seekhenge:

• Lambda Expression kya hota hai
• Syntax aur structure
• Functional Interface ke saath use
• Real examples
• Advantages

Lambda Expression ek:

anonymous function (naam ke bina function)

Use hota hai:

short aur clean code likhne ke liye

(parameters) -> expression

(a, b) -> a + b

interface MyInterface {
    void show();
}

class Test {

    public static void main(String[] args){

        MyInterface obj = new MyInterface() {
            public void show(){
                System.out.println("Hello");
            }
        };

        obj.show();
    }
}

MyInterface obj = () -> {
    System.out.println("Hello");
};

obj.show();

✔ short
✔ clean

✔ Lambda sirf tab use hota hai jab:

interface me ek hi abstract method ho

() -> System.out.println("Hello");

x -> x * x

(a, b) -> a + b

(a, b) -> {
    return a + b;
}

(a, b) -> a + b

import java.util.*;

class Test {

    public static void main(String[] args){

        List<Integer> list = Arrays.asList(1,2,3,4);

        list.forEach(n -> System.out.println(n));
    }
}

Collections.sort(list, (a, b) -> b - a);

Thread t = new Thread(() -> {
    System.out.println("Thread running");
});

t.start();

✔ less code
✔ readable code
✔ functional programming support
✔ no boilerplate code

❌ multiple methods wale interface me use nahi hota
❌ complex logic me readability kam ho sakti hai

event handling
sorting
filtering data

✔ Java 8 me introduce hua
✔ functional interface ke saath use hota hai
✔ method reference ka base hai

1. Lambda expression kya hota hai?
2. Functional interface kya hota hai?
3. Lambda vs anonymous class?
4. lambda ka syntax kya hai?

Is lesson me humne seekha:

✔ Lambda Expression concept
✔ syntax aur usage
✔ functional interface relation
✔ real examples

Lambda Expression Java me modern aur concise coding style provide karta hai.