The state mode puts the change of the state and the operation in the corresponding state together,
package com.roc.state;
public class Context {
private State state;
public Context(State state){
this.state=state;
}
public State getState() {
return state;
}
public void setState(State state) {
this.state = state;
}
public void stateChange(){
state.action(this);
}
}
package com.roc.state;
/**
* abstract state class
* @author liaowp
*
*/
public abstract class State {
public abstract void action(Context context);
}
//The specific class, perform the corresponding operation, and set the state after the operation
package com.roc.state;
public class OpenSate extends State{
public void action(Context context) {
System.out.println("开");
context.setState(new CloseState());
}
}