使用nextInt和nextLine（）时出现问题 [英] Trouble using nextInt and nextLine()

问题描述

这不是让我把我的名字放进去，但是这个时代的确很好。
我知道我可以改变语句的顺序，但还有另外一种方法吗？

It's not letting me put my name in but it does the age works fine. I know i can change the order of the statements but is there another way I could do it?

import java.util.Scanner;

public class ScannerErr2
{
  public static void main(String [] args)
  {
    Scanner keyboard= new Scanner(System.in);
    String name;
    int    age;

    System.out.print("Enter your age : ");
    age= keyboard.nextInt();
    System.out.print("Enter your name: ");
    name= keyboard.nextLine();

    System.out.println("Age : "+age);
    System.out.println("Name: "+name);
  }
}

推荐答案

你问题是，下一个int不考虑输入名称部分的新行字符。因此，名称将返回为空白。

You problem is that the next int doesn't consider the new line character which goes in the input for your name part. Hence name is returned as blank.

您可以通过两种方式更改代码：

You can change your code in 2 ways:

System.out.print("Enter your age : ");
age = keyboard.nextInt();
keyboard.nextLine();
System.out.print("Enter your name: ");
name = keyboard.nextLine();

或

System.out.print("Enter your age : ");
age = Integer.parseInt(keyboard.nextLine().trim());
System.out.print("Enter your name: ");
name = keyboard.nextLine();

我个人喜欢第二种方式。

I personally like the second way.

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