一个java状态机样例的代码

package stateMachine; /** * 2.带有状态机的机器 */ /** * 机器类，包含多种状态，处理流程 * @author seacean * @date 2013-8-29 */ public class Machine { //机器本身包含所有的状态机 private State soldOutState; private State noQuarterState; private State hasQuarterState; private State soldState; private State state; //机器的当前状态 private int count = 0;//机器中当前糖果的数量 /** * 初始化机器，引入所有的状态机，初始化糖果数量，初始化机器状态 * @param count */ public Machine(int count) { this.soldOutState = new SoldOutState(this); this.noQuarterState = new NoQuarterState(this); this.hasQuarterState = new HasQuarterState(this); this.soldState = new SoldState(this); this.count = count; if (this.count > 0) { this.state = noQuarterState; } } /** * 释放糖果时的内部处理程序 */ public void releaseBall() { System.out.println("a gumball comes rolling out the solt..."); if (count > 0) { count -= 1; } } public void insertQuerter() { state.insertQuarter();//加入硬币 } public void ejectQuarter() { state.ejectQuarter(); } public void turnCrank() { state.turnCrank(); state.dispense(); } public State getSoldOutState() { return soldOutState; } public State getNoQuarterState() { return noQuarterState; } public State getHasQuarterState() { return hasQuarterState; } public State getSoldState() { return soldState; } public State getState() { return state; } public int getCount() { return count; } public void setState(State state) { this.state = state; } }