CODEWITHSUNDEEP
java
rubixibuc
rubixibuc

Reputation: 7427

If all class extends object why can't they all call clone

class Main {

    public static void main(String[] args) {
        new Cloned().clone();
    }
}

class Cloned implements Cloneable {
}

This gives an error, saying it is protected. None of the subclasses of object can call that method.

Upvotes: 5

Views: 662

Answers (3)

Mohammod Hossain
Mohammod Hossain

Reputation: 4114

class Main implements Cloneable {

    public static void main(String[] args) {

    }
        
      
    @Override
    protected Object clone() throws CloneNotSupportedException {
        //TODO Auto-generated method stub
        return super.clone();
    }
}

Upvotes: 1

aioobe
aioobe

Reputation: 421340

The problem here is that Main doesn't extend Cloned. As it stands, Main can call Main.clone, but not Cloned.clone.

The fact that the clone method is declared in Object doesn't matter here. Apart from public methods, a class can only call its own inherited methods. This includes the protected ones from its super-classes, but not protected methods of others (super) classes.

Upvotes: 4

PC.
PC.

Reputation: 7024

because clone() is protected method in the class Object

if you want clone() to be accessed publically, u need to override that method in ur class.

@override
public Object clone()
{
    return super.clone();
}

Upvotes: 7

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