Summary
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The `java.nio.channels.DatagramChannel` methods `connect()` and `send()` throw unspecified exceptions.

Problem
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`DatagramChannel.send` may throw an unspecified `IllegalArgumentException` if the channel is already connected and its address parameter differs from the address to which the channel is connected. This exception should be changed to the more apt `java.nio.channels.AlreadyConnectedException`.

After the foregoing change, both `DatagramChannel.connect` and `DatagramChannel.send` may throw  `java.nio.channels.AlreadyConnectedException`, `java.nio.channels.UnresolvedAddressException`, or `java.nio.channels.UnsupportedAddressTypeException`, none of which are specified.

Solution
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Update the `DatagramChannel.connect` and `DatagramChannel.send` documentation to specify that these methods may throw `java.nio.channels.AlreadyConnectedException`, `java.nio.channels.UnresolvedAddressException`, and `java.nio.channels.UnsupportedAddressTypeException`.

Specification
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Please refer to the attached specdiff `specdiff-dc-exceptions-8198753.zip`.