HighState.java

public class HighState extends AbstractState
{
	public HighState(AbstractState state)
	{
		this.acc=state.acc;
		this.point=state.getPoint();
		this.stateName="专家";
	}
	
	public void writeNote(int score)
	{
		System.out.println(acc.getName() + "发布留言" + "，增加" + score + "*2个积分。");
		this.point+=score*2;
		checkState(score);
		System.out.println("剩余积分为：" + this.point + "，当前级别为：" + acc.getState().stateName + "。");
	}
	
    public void downloadFile(int score)
    {
    	System.out.println(acc.getName() + "下载文件，扣除" + score + "/2积分。");
		this.point-=score/2;
		checkState(score);
		System.out.println("剩余积分为：" + this.point + "，当前级别为：" + acc.getState().stateName + "。");    }
			
	public void checkState(int score)
	{
		if(point<0)
		{
			System.out.println("余额不足，文件下载失败！");
			this.point+=score;
		}
		else if(point<=100)
		{
			acc.setState(new PrimaryState(this));
		}
		else if(point<=1000)
		{
			acc.setState(new MiddleState(this));
		}
	}
}