软件设计-Tutorial12

package Tutorial12;

// 定义各个硬件设备和软件的类
class Memory {
    public boolean check() {
        System.out.println("Memory self-checking...");
        // 假设返回true表示自检成功
        return true;
    }
}

class CPU {
    public boolean run() {
        System.out.println("CPU running...");
        // 假设返回true表示CPU运行成功
        return true;
    }
}

class HardDisk {
    public boolean read() {
        System.out.println("Hard Disk reading...");
        // 假设返回true表示硬盘读取成功
        return true;
    }
}

class OS {
    public boolean load() {
        System.out.println("Operating System loading...");
        // 假设返回true表示系统载入成功
        return true;
    }
}

// 创建外观类 ComputerFacade，用于封装开机的复杂逻辑
class ComputerFacade {
    private Memory memory;
    private CPU cpu;
    private HardDisk hardDisk;
    private OS os;

    public ComputerFacade() {
        this.memory = new Memory();
        this.cpu = new CPU();
        this.hardDisk = new HardDisk();
        this.os = new OS();
    }

    // 开机方法
    public void on() {
        System.out.println("Computer starting...");

        // 依次调用各个硬件和软件的启动方法，检查是否成功
        if (memory.check() && cpu.run() && hardDisk.read() && os.load()) {
            System.out.println("Computer started successfully!");
        } else {
            System.out.println("Computer failed to start.");
        }
    }
}

// 测试主机类
public class Mainframe {
    public static void main(String[] args) {
        ComputerFacade computer = new ComputerFacade();
        // 按下开机按钮
        computer.on();
    }
}