import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class class_back {

	/**
	 * @param args
	 */
	static float xx = 0;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Back_Serve back = new Back_Serve(500);
		getMoney();
		back.set_GetMoeny(xx);
		try {
			back.Withdrawal();
		} catch (ErrorPrint e) {
			//e.printStackTrace();
			e.printfError();
		}
	}
	public static void getMoney(){
		System.out.print("請輸入取款錢數：");
		try {
			BufferedReader cin = new BufferedReader(new InputStreamReader(System.in));
			String cinx = cin.readLine();
			xx = Float.parseFloat(cinx);
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

class Back_Serve{
	private float Back_MoneyTotal ;
	private float putMoney ;
	private float getMoeny ;
	Back_Serve(){
		
		this.Back_MoneyTotal = 0 ;
		
	}
	Back_Serve(float MoneyTotal){
		
		this.Back_MoneyTotal = MoneyTotal ;
	}
	public void set_PutMoeny(float money){
		
		this.putMoney = money ;
	}
	public void set_GetMoeny(float money){
		
		this.getMoeny = money ;
	}
	public float Personal_Back_MoneyTotal(){

		return this.Back_MoneyTotal ;
	}
	public float Persional_Get_MoneyTotal(){
		
		return this.getMoeny ;
	}

	public void Withdrawal()throws ErrorPrint{
		if(Persional_Get_MoneyTotal() > Personal_Back_MoneyTotal()){
			
			throw new ErrorPrint();
		}else{
			this.Back_MoneyTotal = this.Personal_Back_MoneyTotal() - this.Persional_Get_MoneyTotal() ;
			System.out.println("取款金額為：" + this.Persional_Get_MoneyTotal());
			System.out.println("銀行剩余錢數：" + this.Personal_Back_MoneyTotal());
		}

	}
}

class ErrorPrint extends Exception{
	//自定義的異常處理類
	ErrorPrint(){}
	public void printfError()	{
		
		System.out.println("對不起，銀行當前總錢數無法滿足您的要求，請稍候在取款，謝謝合作！！");
		System.exit(1);
	}
}