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Java

Posted by Siddesh Gannu
Siddesh Gannu
3,565 Points

why do we not need to create instance to call the isEmpty() method?

if(!isEmpty()) I dont understand how we can call the method without creating an instance for it. We did not even set the method to be Static where it would be then accessible to the whole class. Thanks to whomever answers!

Alexander Davison
Alexander Davison
65,469 Points

Hello Siddesh,

Which video are you watching? Please link to it, as well as the minutes in you've watched. This will help us help you! Thanks :)

Siddesh Gannu
Siddesh Gannu
3,565 Points

https://teamtreehouse.com/library/incrementing-and-decrementing

It was Java track. Incrementing and Decrementing. 5:36. Thanks Alex :)

1 Answer

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

The isEmpty() method is being called from within the class it was made, so you don't have to create an instance. If you define a method within a class, it can access other methods from the class with no problem. For example...

class HelloWorld {
    public void hello() {
        System.out.println("hello");
    }
    public void world() {
        System.out.println("world");
    }
    public void helloWorld() {
        hello();
        world();
    }
}