CODEWITHSUNDEEP
javainputstream
arney
arney

Reputation: 845

Does InputStream.close() do anything?

As per the official documentation:

public void close() throws IOException

Closes this input stream and releases any system resources associated with the stream.

The close method of InputStream does nothing.

So does it do nothing or something?

Upvotes: 6

Views: 4420

Answers (3)

Sleiman Jneidi
Sleiman Jneidi

Reputation: 23329

No it doesn't do anything, but InputStream is an abstract class where close isn't abstract (it implements java.io.Closeable ), it has an empty body. Implementers of InputStream can optionally override the method. FileInputStream closes the file input stream and releases any system resources where ByteInputStream does nothing.

Upvotes: 10

malaguna
malaguna

Reputation: 4233

As @Kayaman says, InputStream is an abstract class and close method is not implemented there. If your are curious you can see this link which sows you close method on java.io.FileInputStream of openjdk version 8u40-b25, from GrepCode.

Upvotes: -1

Kayaman
Kayaman

Reputation: 73528

The close() method of InputStream does nothing. The close() method of subclasses of InputStream may do something.

Upvotes: 3

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