abstract
Java abstract kalit so‘zi
Misol
abstract metod abstract sinfga tegishli bo‘ladi va uning tanasi bo‘lmaydi. Tanani voris sinf (subclass) taqdim etadi:
// Code from filename: Main.java
// abstract class
abstract class Main {
public String fname = "John";
public int age = 24;
public abstract void study(); // abstract method
}
// Subclass (inherit from Main)
class Student extends Main {
public int graduationYear = 2018;
public void study() { // the body of the abstract method is provided here
System.out.println("Studying all day long");
}
}
// End code from filename: Main.java
// Code from filename: Second.java
class Second {
public static void main(String[] args) {
// create an object of the Student class (which inherits attributes and methods from Main)
Student myObj = new Student();
System.out.println("Name: " + myObj.fname);
System.out.println("Age: " + myObj.age);
System.out.println("Graduation Year: " + myObj.graduationYear);
myObj.study(); // call abstract method
}
}
Ta’rif va qo‘llanilishi
abstract kalit so‘zi sinflar va metodlar uchun ishlatiladigan kirishga oid bo‘lmagan modifikatordir.
Sinf: Abstrakt sinf — obyektlar yaratish uchun ishlatib bo‘lmaydigan cheklangan sinf (unga murojaat qilish uchun undan boshqa sinf meros olishi kerak).
Metod: Abstrakt metod faqat abstrakt sinfda ishlatilishi mumkin va uning tanasi bo‘lmaydi. Tanani voris sinf (subclass) taqdim etadi.
Tegishli sahifalar
Modifikatorlar haqida Java modifikatorlari darsligimizda batafsil o‘qing.
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