这是内存泄漏还是误报? [英] Is this a memory leak or a false positive?

问题描述

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) 收到警告说(我正在用 jdk1.7.0_05 编译.):

I get a warning at new Scanner(a) that says (I'm compiling with jdk1.7.0_05.):

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

我做错了什么，还是只是一个错误的警告?

Am I doing something wrong, or is this just a false warning?

推荐答案

这样拆分代码，警告会消失吗?

If you split the code like this, will the warning go away?

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

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