Adapter Pattern

title: Adapter Design Pattern description: Incompatible interfaces ko compatible banana

Ek interface ko doosre mein convert karna — incompatible classes ko saath kaam karana.

Example — Old aur New payment system

java exampleWoHoTech

// New interface jo hum chahte hain
interface ModernPayment {
    void processPayment(double amount, String currency);
}

// Old system jo hum change nahi kar sakte
class LegacyPaymentSystem {
    void makePayment(int amountInPaise) {
        System.out.println("Legacy payment: " + amountInPaise + " paise");
    }
}

// Adapter — LegacyPaymentSystem ko ModernPayment interface mein wrap karta hai
class PaymentAdapter implements ModernPayment {
    private LegacyPaymentSystem legacySystem;

    PaymentAdapter(LegacyPaymentSystem legacySystem) {
        this.legacySystem = legacySystem;
    }

    @Override
    public void processPayment(double amount, String currency) {
        // Convert rupees to paise
        int amountInPaise = (int)(amount * 100);
        legacySystem.makePayment(amountInPaise);
    }
}

// Use
ModernPayment payment = new PaymentAdapter(new LegacyPaymentSystem());
payment.processPayment(250.50, "INR");

Real-world Examples

Arrays.asList() — array ko List mein adapt
InputStreamReader — InputStream ko Reader mein adapt
Spring's HandlerAdapter

title: Adapter Design Pattern description: Incompatible interfaces ko compatible banana

Ek interface ko doosre mein convert karna — incompatible classes ko saath kaam karana.

Example — Old aur New payment system

java exampleWoHoTech

// New interface jo hum chahte hain
interface ModernPayment {
    void processPayment(double amount, String currency);
}

// Old system jo hum change nahi kar sakte
class LegacyPaymentSystem {
    void makePayment(int amountInPaise) {
        System.out.println("Legacy payment: " + amountInPaise + " paise");
    }
}

// Adapter — LegacyPaymentSystem ko ModernPayment interface mein wrap karta hai
class PaymentAdapter implements ModernPayment {
    private LegacyPaymentSystem legacySystem;

    PaymentAdapter(LegacyPaymentSystem legacySystem) {
        this.legacySystem = legacySystem;
    }

    @Override
    public void processPayment(double amount, String currency) {
        // Convert rupees to paise
        int amountInPaise = (int)(amount * 100);
        legacySystem.makePayment(amountInPaise);
    }
}

// Use
ModernPayment payment = new PaymentAdapter(new LegacyPaymentSystem());
payment.processPayment(250.50, "INR");

Real-world Examples

Arrays.asList() — array ko List mein adapt
InputStreamReader — InputStream ko Reader mein adapt
Spring's HandlerAdapter

Adapter Pattern

Example — Old aur New payment system

Real-world Examples

Continue learning this concept

Adapter Pattern

Example — Old aur New payment system

Real-world Examples

Continue learning this concept