Make your dog happy.

DogCommand.java

import java.util.Scanner;

class Dog {
	String dogName;
	String command;
	boolean wanttoplay;
	boolean hungry;
	Scanner keyboard = new Scanner(System.in);
	
	void setName() {
		System.out.print("What is your dogs name?: ");
		dogName = keyboard.next();
		System.out.print("Your dogs name is " + dogName + ". Is this correct? [y/n] ");
		this.checkName();
	}
	void checkName() {
		command = keyboard.next();
		if (command.equals("n") || command.equals("N")) {
			this.setName();
		} else if (!(command.equals("y") || command.equals("Y") || command.equals("yes"))) {
			System.out.println("Incorrect input.");
			System.out.print("Your dogs name is " + dogName + ". Is this correct? [y/n] ");
			this.checkName();
		}
	}
	void stare() {
		System.out.println(this.dogName + " sits and stares at you.");
		this.command();
	}
	void command() {
		System.out.println();
		System.out.println("What would you like to do?");
		command = keyboard.next();
		if (command.equals("play")) {
			this.play();
		} else if (command.equals("feed")) {
			this.feed();
		} else if (command.equals("pet")) {
			this.pet();
		} else if (command.equals("quit") || command.equals("exit")) {
			System.exit(0);
		} else if (command.equals("restart") || command.equals("reset")) {
			this.restart();
		} else {
			System.out.println("Unknown command");
			this.command();
		}
	}
	void play() {
		if (this.wanttoplay) {
			System.out.println(dogName + " plays with you!");
			this.wanttoplay = false;
			this.hungry = true;
		} else {
			System.out.println(dogName + " doesn't want to play.");
		}
		this.command();
	}
	void feed() {
		if (this.hungry) {
			System.out.println(dogName + " eats the food.");
			this.hungry = false;
			System.out.println("Congrats! Your dog is happy!");
		} else {
			System.out.println(dogName + " isn't hungry.");
			this.command();
		}
	}
	void pet() {
		System.out.println(dogName + " drools all over you.");
		this.wanttoplay = true;
		this.command();
	}
	void restart() {
		String[] args = new String[0]; // Or String[] args = {};
		DogCommand.main(args);
	}
}
class DogCommand {
	String dogName;
	String command;
	Scanner keyboard = new Scanner(System.in);
	
	public static void main(String[] args) {
		System.out.println("The goal is to make your dog happy.");
		System.out.println("Commands: play, feed, pet");
		System.out.println();
		Dog dog = new Dog();
		dog.setName();
		dog.stare();
	}

}