❓ 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

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❓ ما ناتج الجمع مع break؟
What is the output with break?

int sum = 0;
for (int i = 1; i <= 5; i++) {
  if (i == 4) break;
  sum += i;
}
System.out.println(sum);

❓ do-while تُنفَّذ مرة على الأقل
do-while runs at least once

int i = 5;
do { i++; } while (i < 5);
System.out.println(i);