java模拟设备管理键盘鼠标打印机显示器

首先，你需要定义一个设备类，包括设备名称、设备类型和设备状态等属性，并实现设备的操作方法。

以下是一个简单的设备类的示例代码：

public class Device {
    private String name;
    private String type;
    private boolean status;

    public Device(String name, String type) {
        this.name = name;
        this.type = type;
        this.status = false;
    }

    public void turnOn() {
        this.status = true;
        System.out.println(this.name + " is turned on.");
    }

    public void turnOff() {
        this.status = false;
        System.out.println(this.name + " is turned off.");
    }

    public boolean getStatus() {
        return this.status;
    }

    public String getType() {
        return this.type;
    }

    public String getName() {
        return this.name;
    }
}

接下来，你可以创建具体的设备类，例如键盘、鼠标、打印机和显示器等。

以下是一个键盘类的示例代码：

public class Keyboard extends Device {
    public Keyboard(String name, String type) {
        super(name, type);
    }

    public void type(String content) {
        if (this.getStatus()) {
            System.out.println("Input: " + content);
        } else {
            System.out.println("Keyboard is turned off.");
        }
    }
}

以下是一个鼠标类的示例代码：

public class Mouse extends Device {
    public Mouse(String name, String type) {
        super(name, type);
    }

    public void click() {
        if (this.getStatus()) {
            System.out.println("Mouse clicked.");
        } else {
            System.out.println("Mouse is turned off.");
        }
    }
}

以下是一个打印机类的示例代码：

public class Printer extends Device {
    private String paper;

    public Printer(String name, String type) {
        super(name, type);
        this.paper = "";
    }

    public void print(String content) {
        if (this.getStatus()) {
            this.paper += content;
        } else {
            System.out.println("Printer is turned off.");
        }
    }

    public void showPaper() {
        System.out.println("Paper: " + this.paper);
    }
}

以下是一个显示器类的示例代码：

public class Monitor extends Device {
    private String screen;

    public Monitor(String name, String type) {
        super(name, type);
        this.screen = "";
    }

    public void display(String content) {
        if (this.getStatus()) {
            this.screen += content;
            System.out.println("Display: " + this.screen);
        } else {
            System.out.println("Monitor is turned off.");
        }
    }
}

最后，你可以在主函数中创建这些设备，并进行操作。

以下是一个简单的主函数的示例代码：

public static void main(String[] args) {
    Keyboard keyboard = new Keyboard("Keyboard", "Input");
    Mouse mouse = new Mouse("Mouse", "Input");
    Printer printer = new Printer("Printer", "Output");
    Monitor monitor = new Monitor("Monitor", "Output");

    keyboard.turnOn();
    mouse.turnOn();
    printer.turnOn();
    monitor.turnOn();

    keyboard.type("Hello world!");
    mouse.click();
    printer.print("This is a test.");
    monitor.display("Welcome to Java World!");

    printer.showPaper();
}