QQ音乐好声音歌曲送成长天等级加速
661 2023-04-03 05:14:59
1 object Test11_CommonOp { 2 def main(args: Array[String]): Unit = { 3 val list = List(1, 2, 3, 4, 5, 6) 4 val set = Set(11, 12, 13) 5 6 //1、获取集合长度 7 println(list.length) 8 9 //2、获取集合大小10 //因为Set集合是无序的,所以没有大小11 println(set.size)12 13 println("-----------------")14 15 //3、循环遍历16 for (elem <- list) print(elem)17 println()18 set.foreach(print(_))19 println()20 21 //4、迭代器22 for (elem <- list.iterator) println(elem)23 println("---------------")24 25 //5、生成字符串26 println(list)27 println(set.mkString("-"))28 29 //6、是否包含30 println(list.contains(100))31 println(set.contains(11))32 }33 }