java - 这是内存泄漏还是误报？

Question

这是我的代码:

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.Scanner;

public class temp {
    public static void main(String[] args) throws FileNotFoundException {
        BufferedReader a = new BufferedReader(new FileReader("a"));
        Scanner scanner = new Scanner(a).useDelimiter(",");
        scanner.close();
    }
}

我在 new Scanner(a) 处收到一条警告，上面写着(我正在使用 jdk1.7.0_05 进行编译。):

Resource leak: '<unassigned Closeable value>' is never closed.

是我做错了什么，还是只是一个错误的警告？

Answer 1

如果你这样拆分代码，警告会消失吗？

  Scanner scanner = new Scanner(a);
  scanner.useDelimiter(",");
  scanner.close();