The following example shows a way to cast a value in Scala. In this example, one of the java utility methods called “getNetworkInterfaces” class returns something we want cast to a more specific class, a NetworkInterface:<\/p>\n
\nval e = NetworkInterface.getNetworkInterfaces\nwhile(e.hasMoreElements) {\n val networkInterface = e.nextElement match {\n case e: NetworkInterface => e\n case _ => ???\n }\n\n \/\/ process this network adapter\n} \n<\/pre>\nOnce the “match” evaluates, the “networkInterface” variable will have the desired type.<\/p>\n
If the cast fails, we throw NotImplementedException (??? is a shortcut for this). You could alternately try different casts by matching on other patterns.<\/p>\n","protected":false},"excerpt":{"rendered":"
The following example shows a way to cast a value in Scala. In this example, one of the java utility methods called “getNetworkInterfaces” class returns something we want cast to a more specific class, a NetworkInterface: val e = NetworkInterface.getNetworkInterfaces while(e.hasMoreElements) { val networkInterface = e.nextElement match { case e: NetworkInterface => e case _ … <\/p>\n