❓ الفرق بين abstract و interface
Abstract class vs interface

❓ مستوى الوصول عند إعادة التعريف
Access level when overriding

❓ التعامل مع الاستثناءات في finally
Try-catch-finally order

try {
  int x = 1 / 0;
  System.out.print("A");
} catch (ArithmeticException e) {
  System.out.print("B");
} finally {
  System.out.print("C");
}

❓ الاستثناءات المُتَحَقَّقة (Checked)
Checked exceptions handling

void read() throws java.io.IOException {}
void m(){ read(); }

❓ تفضيل التحويلات في Overload
Overload preference (widening vs boxing vs varargs)

static void m(long x){ System.out.print("long"); }
static void m(Integer x){ System.out.print("Integer"); }
static void m(int... x){ System.out.print("varargs"); }

m(5);

حسابي الخاص باستقبال المشاريع سوى مواقع او بوتات وغيرها
t.me/best_coding

❓ ترتيب التهيئة: static ثم instance ثم constructor
Initialization order

class X {
  static { System.out.print("S"); }
  { System.out.print("I"); }
  X(){ System.out.print("C"); }
}
new X();

❓ إخفاء الحقول (Field Hiding)
Field hiding resolution

class A { int v = 1; }
class B extends A { int v = 2; }
B b = new B();
System.out.println(((A)b).v);

❓ استخدام this للإشارة لحقل مُغَطّى
Using this to refer to a shadowed field

class T {
  int n = 10;
  void set(int n){ n = n; }
  int get(){ return n; }
}
T t = new T();
t.set(5);
System.out.println(t.get());

❓ التركيب مقابل الوراثة
Composition vs inheritance

Enjoy our content? Advertise on this channel and reach a highly engaged audience! 👉🏻

It's easy with Telega.io. As the leading platform for native ads and integrations on Telegram, it provides user-friendly and efficient tools for quick and automated ad launches.

⚡️ Place your ad here in three simple steps:

1 Sign up

2 Top up the balance in a convenient way

3 Create your advertising post

If your ad aligns with our content, we’ll gladly publish it.

Start your promotion journey now!