誤差java.util.Scanner的

Question

import java.util.Scanner; 

public class Solution { 

    public static void main(String[] args) { 
     Scanner scan = new Scanner(System.in); 
     int i = scan.nextInt(); 
     String s = scan.nextLine(); 
     double d = scan.nextDouble(); 
     System.out.println("String: " + s); 
     System.out.println("Double: " + d); 
     System.out.println("Int: " + i); 
    } 
} 

Answer 1

你的代碼運行，但你應該添加一些用戶提示：

import java.util.Scanner; 

public class TimeTest { 

    public static void main(String[] args) { 
     Scanner scan = new Scanner(System.in); 
     System.out.println("Input integer:"); 
     int i = scan.nextInt(); 
     System.out.println("Input string:"); 
     String s = scan.nextLine(); 
     System.out.println("Input double:"); 
     double d = scan.nextDouble(); 
     System.out.println("String: " + s); 
     System.out.println("Double: " + d); 
     System.out.println("Int: " + i); 
    } 
} 

應當注意的是，你將有一個問題，試圖讓你的字符串輸入。您需要在String s = scan.nextInt();