Anonymous Class

title: Anonymous Class in Java description: Anonymous inner class ka concept aur use

Naam ke bina class. Interface ya abstract class ko on-the-spot implement karta hai.

Interface ke liye

java exampleWoHoTech

interface Greeting {
    void greet(String name);
}

// Anonymous class — naam nahi hai
Greeting hindi = new Greeting() {
    @Override
    public void greet(String name) {
        System.out.println("Namaste, " + name + "!");
    }
};

Greeting english = new Greeting() {
    @Override
    public void greet(String name) {
        System.out.println("Hello, " + name + "!");
    }
};

hindi.greet("Ram");    // Namaste, Ram!
english.greet("John"); // Hello, John!

Abstract Class ke liye

java exampleWoHoTech

abstract class Animal {
    abstract void sound();
    void breathe() { System.out.println("Saans le raha hai"); }
}

Animal dog = new Animal() {
    @Override
    void sound() { System.out.println("Woof!"); }
};

dog.sound();
dog.breathe();

Java 8+ Alternative — Lambda

java exampleWoHoTech

// Anonymous class (old way)
Runnable r1 = new Runnable() {
    public void run() { System.out.println("Running"); }
};

// Lambda (new way — only for functional interfaces)
Runnable r2 = () -> System.out.println("Running");

Use Cases

GUI event listeners
Thread creation
Comparator implementation
One-time use implementations

title: Anonymous Class in Java description: Anonymous inner class ka concept aur use

Naam ke bina class. Interface ya abstract class ko on-the-spot implement karta hai.

Interface ke liye

java exampleWoHoTech

interface Greeting {
    void greet(String name);
}

// Anonymous class — naam nahi hai
Greeting hindi = new Greeting() {
    @Override
    public void greet(String name) {
        System.out.println("Namaste, " + name + "!");
    }
};

Greeting english = new Greeting() {
    @Override
    public void greet(String name) {
        System.out.println("Hello, " + name + "!");
    }
};

hindi.greet("Ram");    // Namaste, Ram!
english.greet("John"); // Hello, John!

Abstract Class ke liye

java exampleWoHoTech

abstract class Animal {
    abstract void sound();
    void breathe() { System.out.println("Saans le raha hai"); }
}

Animal dog = new Animal() {
    @Override
    void sound() { System.out.println("Woof!"); }
};

dog.sound();
dog.breathe();

Java 8+ Alternative — Lambda

java exampleWoHoTech

// Anonymous class (old way)
Runnable r1 = new Runnable() {
    public void run() { System.out.println("Running"); }
};

// Lambda (new way — only for functional interfaces)
Runnable r2 = () -> System.out.println("Running");

Use Cases

GUI event listeners
Thread creation
Comparator implementation
One-time use implementations

Anonymous Class

Interface ke liye

Abstract Class ke liye

Java 8+ Alternative — Lambda

Use Cases

Continue learning this concept

Anonymous Class

Interface ke liye

Abstract Class ke liye

Java 8+ Alternative — Lambda

Use Cases

Continue learning this concept