让我猜一下 – 你没有显示使用上面尝试获取lastName的扫描器的代码.在那次尝试中,你没有处理行尾令牌,所以它是悬空的,只是被你试图获取lastName的nextLine()调用吞噬.

例如,如果你有这个：

Scanner keyboard = new Scanner(System.in);

System.out.print("Enter a number: ");

int number = keyboard.nextInt(); // dangling EOL token here

System.out.print("Last name: ");

lastName = keyboard.nextLine();

你会遇到问题.

一种解决方案,每当你离开EOL令牌悬空时,通过调用keyboard.nextLine()来吞下它.

例如.,

Scanner keyboard = new Scanner(System.in);

System.out.print("Enter a number: ");

int number = keyboard.nextInt();

keyboard.nextLine(); // **** add this to swallow EOL token

System.out.print("Last name: ");

lastName = keyboard.nextLine();