“在”永远不会关闭

Question

有在我的代码错误这是给我一个警告

警告：资源泄漏：“在”永远不会关闭

我以前从来没有过这样的问题，其实我尝试了我编写的旧程序，它仍然给我提出同样的问题。我该如何解决 ？

import java.util.Scanner ; 


public class CountVowels 
{ 
    public static void main(String[] args) 
    { 
     Scanner in = new Scanner(System.in); 
     System.out.println("Enter a word: "); 
     String word = in.next(); 

     int vowelCount = 0; 
     for (int i = 0; i < word.length(); i++) 
     { 
     char currentCharacter = word.charAt(i); 
     if (currentCharacter == 'a' || currentCharacter == 'A' 
      || currentCharacter == 'e' || currentCharacter == 'E' 
      || currentCharacter == 'i' || currentCharacter == 'I' 
      || currentCharacter == 'o' || currentCharacter == 'O' 
      || currentCharacter == 'u' || currentCharacter == 'U') 
     { 
      vowelCount++; 
     } 
     } 
     System.out.println(vowelCount + " vowel(s)."); 



    } 
} 

Answer 1

你只需要在你的功能与年底前关闭您的扫描仪：

in.close(); 

像这样：

public static void main(String[] args) 
{ 
    Scanner in = new Scanner(System.in); 
    // Do some stuff using the scanner 
    in.close(); 
} 

而且也看看here。