如何设置可以输入的字符数限制？ (JAVA)

do{
        out.println("\n---------------------------------");
        out.println("---------------------------------");
        out.print("Please type your acces card number: ");

    try{
        card = input.nextInt();

        if(card.length != 10){
            out.println("The number you typed is incorrect");
            out.println("The number must be 10 numbers long");
        continue;
            }
        }   

        catch(InputMismatchException ex){
            }
    }while(true);    

我试图让卡长10个字符.与(1234567890)类似,如果用户输入(123)或(123456789098723),则应显示错误消息. card.length似乎不起作用.

   String card = input.next();
   if(card.length() != 10){
      //Do something
   }

您可以稍后将其轻松转换为int

   int value = Integer.parseInt(card);