A simple dog class

Dog.java

public class Dog {

    String name;

    public Dog(String name) {
        this.name = name;
        System.out.println("Hello, I'm " + name);
    }

    public void bark() {
        System.out.println(name + " says WOOF!");
    }

    public static void main(String[] args) {
        Dog myDog = new Dog("Barney");
        myDog.bark();
    }
}