You can have any number of abstract methods in an abstract class, including zero.

How Many Abstract Methods in an Abstract Class? (Quick Scoop)

Direct answer

  • An abstract class:
    • May have zero abstract methods (all methods can be fully implemented).
* May have **one** abstract method.

* May have **many** abstract methods.
  • The key rule (for languages like Java):
    • If a class has at least one abstract method , the class must be declared abstract.
* The **reverse is not required** : an abstract class is allowed to have no abstract methods at all.

So the answer to “how many abstract methods in abstract class” is:

It can have 0, 1, or any number of abstract methods, depending on the design.

Mini example (Java-style)

Example with one abstract method and one normal method :

java

abstract class Language {
    // abstract method
    abstract void method1();

    // regular (concrete) method
    void method2() {
        System.out.println("This is a regular method");
    }
}

Example of abstract class with no abstract methods (often used just to prevent direct instantiation):

java

abstract class Animal {
    void eat() { /* default implementation */ }
    void sleep() { /* default implementation */ }
    // no abstract methods here
}

Both are valid abstract classes.

Common MCQ trick

Many exam/quiz sites ask things like:

“At least how many abstract methods must an abstract class contain?” with options: 0, 1, 2, 5.

Some older or language‑specific questions may mark “one” as the answer, but in mainstream Java today, the correct conceptual answer is zero (it can have none).

Quick HTML table for clarity

[5][7] [5][7] [9][3] [7][9][5]
Case Is class abstract? Abstract methods count Valid?
Concrete class, no abstract methods No 0 Yes
Concrete class, has abstract method No ≥ 1 No (compile-time error in Java)
Abstract class, no abstract methods Yes 0 Yes
Abstract class, has abstract methods Yes ≥ 1 Yes (typical use)

TL;DR

  • There is no fixed required number of abstract methods in an abstract class.
  • Valid ranges: 0 to any number , as long as:
    • Any class containing an abstract method is declared abstract.
* Abstract classes may contain **abstract + regular** methods, or even **only regular** methods.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.