java - for循环中scanner.nextLine()的问题

Question

Scanner in = new Scanner(System.in);
for (int i = 1; i <= 6; i++) {
    System.out.print("Name: ");
    in.nextLine();
    System.out.print("Age: ");
    in.nextInt()
}

I expect the output of:

姓名:大卫·奥巴马

年龄:14

姓名:艾娃·奥米迪

年龄:53

等等

but this is my output and only once nextLine() is used:

姓名:大卫·奥巴马

年龄:14

姓名: 年龄:

Answer 1

如果你调用了nextInt或nextDouble，你需要调用scan.nextLine();之后立即命令，正确读取任何字符串。

Scanner in = new Scanner(System.in);
for (int i = 1; i <= 6; i++) {
    System.out.print("Name: ");
    in.nextLine();
    System.out.print("Age: ");
    in.nextInt()

    //you need to make another call to nextLine() because of the Scanner object
    //will read the rest of the line where its previous read left off. 
    in.nextLine();
}