early binding و late binding در جاوا

early binding و late binding در جاوا به ترتیب معادل static Polymorphism و dynamic polymorphism هستند.

کلمه کلیدی final در جاوا

• final is another keyword can be used in 3 different ways: 1-before a variable, 2-before a method, 3-before a class

• if it is used before a variable, no one can modify it. that variable changes to a constant. eample; final int x = 100;

• if it is used before a method no one can override the method. overloading is possible but overriding is not possible

• if final keyword used before a class that class can not be extend

دستور پیش فرض در Constructor کلاس در جاوا

• super keyword is a default statement inside a constructor, this keyword must be the first statement inside the constructor and can not be second or ..

• If we are not writing any statement inside the constructor, java compiler will add the default statement to the constructor.

تفاوت Method Overloading و Method Overriding در جاوا

• method overloading is creating more than one method with same name but different signature. It is used to achieve static poly morphisim.

• method overriding is writing more than one method with same name and same signature in super class and sub class to acheive dynamic polymorophisim.

تفاوت this و super در جاوا

super points to the immediate Super class Object whereas this keyword points to the same object.