Learn Java from Scratch - A Beginner's Guide - Step 03 - Create a Method in a Java Class

The video tutorial explains how to create and use methods within a class in Java. It starts with defining a method called 'revolve' in the Planet class and demonstrates how to invoke it using class instances. The tutorial then provides an exercise to implement a 'coming soon' method in a Country class, reinforcing the concept of methods as actions performed on class instances. The video concludes with a recap of the key concepts covered.

What is the primary action that the planets perform in the Planet class?

• Spin

• Revolve

• Rotate

• Orbit

What is the return type of the revolve method in the Planet class?

• void

• String

• int

• boolean

Why do we need to recreate instances after modifying a class?

• To reset the class variables

• To change the class methods

• To update the class name

• To add new properties

How can you call a method defined in a class?

• Using a static reference

• Using a global variable

• Using an object of the class

• Using the class name

What is the purpose of the coming soon method in the Country class?

• To print a message

• To calculate a value

• To modify a variable

• To return a boolean

Which countries are used as instances in the Country class example?

• China and Japan

• USA and Netherlands

• India and Netherlands

• India and USA

What is the main concept demonstrated by adding methods to classes?

• Encapsulation

• Polymorphism

• Inheritance

• Actions on class instances