下面这段程序的运行结果是: private var goodsMutSet: MutableSet = mutableSetOf () private val goodsA:String = "惠普" private val goodsB:String = "联想" private val goodsC:String = "戴尔" private val goodsD:String = "IBM" private val goodsE:String = "长城" private val goodsF:String = "方正" fun main(args: Array ) { //Set没有add(添加)、remove(删除)、clear(清空)等导致集合变更的相关方法 //goodsSet = setOf(goodsA, goodsB, goodsC, goodsD, goodsE, goodsF) goodsMutSet.add(goodsA) goodsMutSet.add(goodsB) goodsMutSet.add(goodsC) goodsMutSet.add(goodsD) goodsMutSet.add(goodsE) goodsMutSet.add(goodsF) goodsMutSet.remove(goodsA) desc = "iterator测试\n" val iterator1 = goodsMutSet.iterator() //如果迭代器还存在下一个节点,则继续取出下一个节点的记录 while (iterator1.hasNext()) { val item = goodsMutSet.iterator().next() desc =desc + item +"\n" //desc = "${desc}名称:${item}\n" //println("temp:\n$item ,") } println("iterator1 while电脑畅销榜包含以下${goodsMutSet.size}款电脑:\n$desc") }