Android: Exception using Closeable interface with Socket

Question

When I try to close a socket through its Closeable interface, I get an exception:

new java.net.Socket().close();
// no error

((java.io.Closeable) new java.net.Socket()).close();
// Throws: java.lang.IncompatibleClassChangeError: interface not implemented

Why is that? The problem is only on Android devices, not on Java programs running on desktop.

Nigel Tufnel · Accepted Answer · 2014-01-25 17:16:45Z

13

To quote Android issue tracker:

Socket implements Closeable only since API level 19 (kitkat) but that information isn't in the generated documentation.

answered Jan 25, 2014 at 17:16

Nigel Tufnel

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1 Comment

Massimo Milazzo Over a year ago

This is a bad lack on the Android documentation... they should find a way to indicate that an interface is implemented (or a class is extended) only since a defined API level. However, thanks :)

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