Prefer try-with-resources to try-finally

笔记

• For example, in the firstLineOfFile method, the call to readLine could throw an exception due to a failure in the underlying physical device, and the call to close could then fail for the same reason. Under these circumstances, the second exception completely obliterates the first one.
  try-finally中，如果finally里抛异常，会压抑掉try中的异常。

• If exceptions are thrown by both the readLine call and the (invisible) close, the latter exception is suppressed in favor of the former.
  try-with-resources中，情况相反，会记录并压抑close()中的异常。可以通过getSuppressed获取压抑住的异常信息。

理解与思考

1. BufferedReader br = new BufferedReader(new FileReader(path))只需要关闭br即可。BufferedReader 会关闭关联的资源。
2. 没找到方法验证例子中的样例代码。

实践