class MyIterator(val iterator: Iterator<Int>){ //自定义迭代器
operator fun next(): Int { //下一个
return iterator.next()
}
operator fun hasNext(): Boolean { //判断是否有下一个
return iterator.hasNext()
}
}
class MyIntList { //自定义列表
private val list = ArrayList<Int>()
fun add(int: Int) { //添加到列表
list.add(int)
}
fun remove(int: Int) { //从列表中移除
list.remove(int)
}
operator fun iterator(): MyIterator { //迭代列表
return MyIterator(list.iterator())
}
}
fun main(args: Array<String>) {
val list = MyIntList()
list.add(1)
list.add(2)
list.add(3)
for (i in list) {
println(i)
}
}
运行结果
