package designpattern.state;

/**

* 抽象状态类

*

* @author liu yuning

*

*/

public abstract class State {

public abstract void handle(Context context);

}

class ConcreteStateA extends State {

@Override

public void handle(Context context) {

System.out.println("现在是在状态A");

context.setState(new ConcreteStateB());

}

}

class ConcreteStateB extends State {

@Override

public void handle(Context context) {

System.out.println("现在是在状态B");

context.setState(new ConcreteStateC());

}

}

class ConcreteStateC extends State {

@Override

public void handle(Context context) {

System.out.println("现在是在状态C");

context.setState(new ConcreteStateA());

}

}