java - System.out.println() 被跳过

Question

在第二个 for 循环没有出现后，我的提示“请输入您的 ID”直接转到“请输入您的密码”。它还跳过了很多从登录提示到密码提示的代码。如果您对它为何如此表现有任何想法，请与我分享，谢谢。

public void main(String[] args){

    Accounts Accounts = new Accounts();

    Scanner kb = new Scanner(System.in);

    System.out.print("Please create a login ID and hit \"ENTER\": ");
    Login = kb.nextLine();

    for(;;){
        if(!Accounts.isTaken(Login)){
            System.out.print("Please create a password and hit \"ENTER\": ");
            PW = kb.nextLine();
            if(Accounts.validPW(PW)){
                Accounts.createAccount(Login, PW);
                break;
            }
        }
    }

    System.out.print("Do you wish to Log in ? (Y/N): ");
    String response = kb.nextLine();
    if((response=="y")||(response=="Y")){
        for(;;){
           //Not Being Shown
            System.out.println("Please enter your ID: "); // ?????? Where are you?????
            Login = kb.nextLine();
            Accounts.login(Login);
            //Goes straight here
            System.out.print("Please enter your Password: ");
            if ((Accounts.isValid(Login))&&(Accounts.checkAuth(kb.nextLine()))){
                break;
            }
            else{
                System.out.println("Invalid Login-Password!");
            }
        }
    }
    System.out.println("Please enter your Password: ");
    System.out.println("LOGIN AUTHORIZED: "+Accounts.checkAuth(kb.nextLine()));
 }

Answer 1

代替

(response=="y")||(response=="Y")

使用

(response.equals("y"))||(response.equals("Y"))