扫描仪问题-Java

您的问题是next（）不会读取回车，它会被您的next next（）或nextLine（）自动读取。一直使用nextLine（）并将输入转换为整数：

public static void main(String[] args) throws Exception {    Scanner scanner = new Scanner(System.in);    System.out.print("nEnter flight number: ");    int flightNumber = Integer.valueOf(scanner.nextLine());    System.out.print("nEnter departing city: ");    String departingCity = scanner.nextLine();    System.out.print("nEnter arrival city: ");    String arrivalCity = scanner.nextLine();}