CODEWITHSUNDEEP
java
jagadeesh k
jagadeesh k

Reputation: 119

clear() method of ByteBuffer in java

I was reading about DatagramChannel in one of the tutorial website.They explained the following sample program

String newData = "New String to write to file..."
                    + System.currentTimeMillis();

ByteBuffer buf = ByteBuffer.allocate(48);
buf.clear();
buf.put(newData.getBytes());
buf.flip();

int bytesSent = channel.send(buf, new InetSocketAddress("example.com", 80));

They have added the line buf.clear() after created ByteBuffer class object. clear() is for clear the buffer.But initially we dont need to clear right??.if it is needed there,then why should we use ??. thanks.(sorry, if any grammer mistake)

Upvotes: 0

Views: 458

Answers (1)

Kayaman
Kayaman

Reputation: 73558

Maybe it's just a bad tutorial/website. It's not needed in a situation where you've just allocated a brand new ByteBuffer. You could just use

ByteBuffer buf = ByteBuffer.wrap(newData.getBytes());

to get rid of the put() and flip() too.

Upvotes: 3

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