Is only single inheritance allowed in java?

no. Java allows single inheritance, a subclass can only inherit from one parent class, but multiple inheritance can be achieved by implementing interfaces.

Is only single inheritance allowed in Java?

Answer: No

Detailed answer:

The Java language does allow single inheritance, which means one Subclasses can only inherit from one parent class.

Reason:

• Promotes simplicity of code: Single inheritance helps keep code clear and easy to understand because each subclass has only one Direct parent class.
• Avoid the diamond problem: Multiple inheritance can lead to the "diamond problem", that is, when two parent classes have the same subclass, method conflicts occur in the subclass.
• Implementing Interfaces: In Java, interfaces are used to define behavior without implementing it. Therefore, Java classes can obtain the functionality of multiple inheritance by implementing multiple interfaces.

Interface implements multiple inheritance

By implementing an interface, a Java class can access methods and variables defined in multiple parent classes. For example:

interface Flyable {
    void fly();
}

interface Swimmable {
    void swim();
}

class Duck implements Flyable, Swimmable {
    @Override
    public void fly() {
        // Duck's flying implementation
    }

    @Override
    public void swim() {
        // Duck's swimming implementation
    }
}

In this case, the Duck class implements two interfaces and gains the ability to fly and swim. Therefore, Java allows multiple inheritance through interfaces without the diamond problem.

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