java - 冲洗物体的正确位置

Question

我写了一小段打印代码:

        BufferedWriter out = null;
        try {
            out = new BufferedWriter(new OutputStreamWriter(
                    new FileOutputStream(FileDescriptor.out), "ASCII"), 512);
            out.write(msg + '\n');
            out.flush();
        } catch (UnsupportedEncodingException e) {

            throw new IllegalStateException(
                    "Test failed ",
                    e);
        } catch (IOException e) {

            throw new IllegalStateException(
                    "Test failed", e);
        } finally {
            if (out != null) {
                out = null;
            }
        }

obj 的刷新仅在 try block 中完成。那么这是一个好方法还是我应该刷新 finally block 中的对象？

Answer 1

如果可以，请使用现代语法，不要担心所有这些。关闭会自动刷新它，所以只需使用 try-with-resources 语法。此代码更短且更易读:

    try(BufferedWriter out = new BufferedWriter(new OutputStreamWriter(
                new FileOutputStream(FileDescriptor.out), "ASCII"), 512)) {
        out.write(msg + '\n');
    } catch (UnsupportedEncodingException | IOException e) {
        logger.info("Test failed due to exception.");
        throw new IllegalStateException("Test failed", e);
    }

查看更多关于 try-with-resources 的信息如果您不熟悉语法。