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How do I convert a numeric IP address like 199.1.32.90 into a hostname like star.blackstar.com?

April 26, 2017convert hostname ip address numeric

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How do I convert a numeric IP address like 199.1.32.90 into a hostname like star.blackstar.com?

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Unfortunately due to an unintended side effect (i.e. a bug) in Java’s caching of IP addresses and hostnames, Java 1.0 can’t convert numeric IP addresses into hostnames. However this is straightforward in Java 1.1.