java - 试图让程序重复

Question

程序检查输入的电子邮件地址是否包含@和.edu如果不是，则需要返回步骤，我想我可以使用 do-while，但我还没有一个可以工作，我如何将 if-else 语句嵌套在 do-while 中？谢谢!

if (UserEmail.contains("@")) {
    if (UserEmail.contains(".edu")){
        System.out.print("Please create a password: ");
        PassWord = kb.nextLine();
        System.out.println(UserEmail.replaceAll("@\\S+?\\.edu\\b", ""));
        System.out.print("Your password is " + PassWord);
    } else {
        System.out.print("email is not valid Please, try again.")
    } else {
        System.out.print("email is not valid Please, try again.");
        // at this point it should repeat and ask for the email again
    }
}

Answer 1

定义方法 isValid(String email, String password,... some more params) a 并将所有检查逻辑放入该方法中。

写这样的东西

while (!isValid(the params)) {
   //ask all the credentials
}