프린이 스캐너 버퍼 좀 잡아죠..

[익명(112.220)]

아 왜 엔터 시발.. sc.nextLine() 여기저기 쑤셔줘봐도 안돼..도와주세요..ㅠㅠ

class Custom{
 
  ArrayList<Bank> list = new ArrayList();
  Scanner sc = new Scanner(System.in);
  int indexNO = 0;
  int menu() {
   Scanner sc = new Scanner(System.in);
   
   System.out.println("======BANK======");
   System.out.println("* 1.추가");  // input
   System.out.println("* 2.조회");  // show
   System.out.println("* 3.입금");  // deposit
   System.out.println("* 4.출금");  // withdraw
   System.out.println("* 5.삭제");  // delete
   System.out.println("* 9.종료");  // quite
   System.out.print("입력>>> ");
   
   int num = Integer.parseInt(sc.nextLine());
   sc.nextLine();
   System.out.println();
   return num;
  }
  
  void input() {
  
  System.out.println("사용할 ID 입력");
  String tmpID = sc.nextLine();
  System.out.println("사용할 PW 입력");
  String tmpPW = sc.nextLine();
  System.out.println("최초 예금액 입력");
  
  int tmpBal = sc.nextInt();
  
  
  
  list.add(new Bank(tmpID,tmpPW,tmpBal));
  
  }
  
  Boolean Autho(String tmpID, String tmpPW) {
   
   Boolean autho = true;
   for(int i = 0; i<list.size(); i++) {
    if(list.get(i).equals(tmpID)) {
     indexNO = i; 
     autho = true;     
   }else { autho = false;}
   }
   return autho;   
  }
  
  void show() {
   for(int i = 0 ; i<list.size();i++) {
   System.out.println(list.get(i));
   }
   System.out.println("ID 입력");   
   String tmpID = sc.next();
   System.out.println("PW 입력");
   String tmpPW = sc.next();
   
   if(Autho(tmpID,tmpPW)==true)
    System.out.println(list.get(indexNO));
   else System.out.println("ㅌ");
    menu();   

  }