外观模式例题

1、CPU类

public class CPU {
   public void run() {
       System.out.println("CPU的运行(run)");
   }
}

2、 硬盘类

public class HardDisk {
   public void read() {
       System.out.println("硬盘(HardDisk)的读取(read)");
   }
}

3、内存类

public class Memory {
   public void check() {
       System.out.println("内存(Memory)的自检(check)");
   }
}

4、 操作系统类

public class OperatingSystem {
   public void load() {
       System.out.println("操作系统的载入(load)");
   }
}

5、计算机主机 外观类

public class MainFrame {
   private Memory memory;
   private CPU cpu;
   private HardDisk hardDisk;
   private OperatingSystem operatingSystem;
   public MainFrame() {
       this.memory = new Memory();
       this.cpu = new CPU();
       this.hardDisk = new HardDisk();
       this.operatingSystem = new OperatingSystem();
   }
   public void on() {
       memory.check();
       cpu.run();
       hardDisk.read();
       operatingSystem.load();
   }
}

6、 客户端类

public class Client {
   public static void main(String[] args) {
       MainFrame mainFrame = new MainFrame();
       mainFrame.on();
   }
}

运行结果：

UML图