状态模式实现电控门的开关（java）

目录《设计模式应用举例 》

需求

动作	开门状态	关门状态	动作后的状态
开	不反应	开门	开门状态
关	关门	不反应	关门状态

代码

class Function{
	public String mStr;
	Function(String str){
		mStr = str;
		exe();
	}
	public void exe() {
		System.out.println(mStr);
	}
};
interface IState{
	void open();
	void close();
}

class OpenState implements IState{
	public void open() {}
	public void close() {
		new Function("closed");
		Door.mState = new CloseState();
	}
}
class CloseState implements IState{
	public void open() {
		new Function("opend");
		Door.mState = new OpenState();
	}
	public void close() {}
}
class Door{
	static IState mState = new CloseState();
	public void open() {
		mState.open();
	}
	public void close() {
		mState.close();
	}
}

public class Client {
	public static void main(String[] args) {
		System.out.println("hello worldff !");
		Door d = new Door();
		System.out.println("client close");
		d.close();
		System.out.println("client open");
		d.open();
		System.out.println("client open2");
		d.open();
		System.out.println("client close2");
		d.close();
	}
}