用JAVA的抽象类实现编码组合进度的灵活性

package cc.openhome;

public abstract class GuessGame {
    public void go() {
        int Number = (int) (Math.random() * 10);
        int guess;
        do {
            print("Please input number: ");
            guess = nextInt();
        } while (guess != Number);
        println("Bingo");
    }
    
    public abstract void print(String text);
    public abstract void println(String text);
    public abstract int nextInt();
}

package cc.openhome;
import java.util.Scanner;


public class ConsoleGuessGame extends GuessGame {
    private Scanner scanner = new Scanner(System.in);
    
    @Override
    public void print(String text) {
        System.out.print(text);
    }
    
    @Override
    public void println(String text) {
        System.out.println(text);
    }
    
    @Override
    public int nextInt() {
        return scanner.nextInt();
    }
}

package cc.openhome;

public class Guess {
    public static void main(String[] args) {
        GuessGame game = new ConsoleGuessGame();
        game.go();
    }
}