object Main { def main(args: Array[String]) { val sites = Map("w3xue" -> "//www.w3xue.com", "baidu" -> "http://www.baidu.com", "taobao" -> "http://www.taobao.com") if( sites.contains( "w3xue" )){ println("w3xue 键存在，对应的值为 :" + sites("w3xue")) }else{ println("w3xue 键不存在") } if( sites.contains( "baidu" )){ println("baidu 键存在，对应的值为 :" + sites("baidu")) }else{ println("baidu 键不存在") } if( sites.contains( "google" )){ println("google 键存在，对应的值为 :" + sites("google")) }else{ println("google 键不存在") } } }