虽然循环没有在Java中的String运算符上完成

Question

只要String Inputconfirmed未设置为＆＃34; ja＆＃34;我的while循环应该运行。在循环的底部。然而不知何故，即使在＆＃34; ja＆＃34;进入。 我的下面的代码，我将非常感谢我在这里做错了什么。 请注意我已经使用.equals和.equalsIgnoreCase而不是.contains。提前谢谢。

String Inputconfirmed = "nee";
   while(!Inputconfirmed.contains("ja")){
        System.out.println("\nHallo daar, welkom bij SPOOKTOCHT!\n"+
                "\nWat is je voornaam?"+
                "\n(Typ je naam en druk op 'ENTER')");
        String Firstname = scan.nextLine();
        System.out.println("Hoi "+Firstname+"!"+
                "\nWat is je achternaam?");
        String Lastname = scan.nextLine();
        System.out.println("Bedankt! En hoe oud is "+Firstname+" "+Lastname+"?");
        int Age = 0;
        while(Age < 1 || Age > 99){
            try{Age = scan.nextInt();
                 } catch (InputMismatchException e){
                 System.out.println("Je mag hier alleen een cijfer invoeren van 1 tot 99."+
                         "\nProbeer het nog eens.");
                 scan.nextLine();
             }
        }
        Character Player = new Character();
        Player.setFirstname(Firstname);
        Player.setLastname(Lastname);
        Player.setAge(Age);
        System.out.println("Dus jij bent: "+Player.getFirstname()+" "+Player.getLastname()+" en je bent "+Player.getAge()+" jaar oud."+
                "\nKlopt dit?");
        Inputconfirmed = scan.nextLine();   
        scan.nextLine();
        }