java - 为什么不调用 java.util.stream.Stream#close()？

Question

当收集一个java.util.stream.Stream时，为什么它的方法void close()没有被调用？

Answer 1

根据 Stream javadoc ,

Streams have a BaseStream.close() method and implement AutoCloseable, but nearly all stream instances do not actually need to be closed after use. Generally, only streams whose source is an IO channel (such as those returned by Files.lines(Path, Charset)) will require closing. Most streams are backed by collections, arrays, or generating functions, which require no special resource management. (If a stream does require closing, it can be declared as a resource in a try-with-resources statement.)

所以，听起来您需要使用 try-with-resources Statement .