JAVA实现账户取款和存款操作

import java.util.Scanner;

public class Blank {
  public static void main(String[] args) {
    float residue = 10000.0f;
    String type;
    Scanner scn = new Scanner(System.in);
    while(true) {
      System.out.println("****当前账户余额:"+residue+"****");
      System.out.println("1.存钱 2.取钱 0.退出");
      System.out.print("请选择(1,2,0):");
      type = scn.nextLine();
      if(type.equals("1")) {
        System.out.print("请输入金额:");
        try {
          int money = scn.nextInt();
          residue = money+residue;
        } catch (Exception e) {
          // TODO: handle exception
          System.out.println("输入错误...");
          scn.nextLine();
        }
      }
      else if(type.equals("2")) {
        try {
          System.out.print("请输入:");
          int money = scn.nextInt();
          if(money>residue) {
            throw new Exception();
          } else {
            residue = residue-money;
          }
        } catch (Exception e) {
          // TODO: handle exception
          System.out.println("余额不足");
          scn.nextLine();
        }
      }
      
      else if(type.equals("0")) {
        System.out.println("bye..");
        break;
      }
    }
    
  }
}