object Main { def main(args: Array[String]) { val colors1 = Map("red" -> "#FF0000", "azure" -> "#F0FFFF", "peru" -> "#CD853F") val colors2 = Map("blue" -> "#0033FF", "yellow" -> "#FFFF00", "red" -> "#FF0000") // ++ 作为运算符 var colors = colors1 ++ colors2 println( "colors1 ++ colors2 : " + colors ) // ++ 作为方法 colors = colors1.++(colors2) println( "colors1.++(colors2)) : " + colors ) } }