main.java

java与模式 一书的源码

/* Generated by Together */

package com.javapatterns.state.switchStatements;

public class Main
{
	
	static final int STATE_LOCKED = 1;
	static final int STATE_UNLOCKED = 2;
	
	static final int EVENT_SPELL = 4;
	static final int EVENT_PASS = 8;
	
	public void Transition(int event)
	{
	    int state = STATE_LOCKED;
	    
	    switch(state)
	    {
	    case (STATE_LOCKED):
	    	switch(event)
	    	{
	    	case (EVENT_SPELL):
	    	    state = STATE_UNLOCKED;
	    	    break;
	    	case (EVENT_PASS):
	    	    Bang();
	    	    break;
	    	}
	        break;
	    case STATE_UNLOCKED:
	        switch(event)
	        {
	        case (EVENT_SPELL):
	            state = STATE_UNLOCKED;
	            break;
	        case (EVENT_PASS):
	            state = STATE_LOCKED;
	            break;
	        }
	        break;
	    }
	}
	
	public void Bang()
	{
	    System.out.println("You are damned.");
	}

}