Question

Java的迭代器是什么，来个通俗易懂的解释

Answer 1

//String[] 遍历
String[] arr = new String[]{"aaa","bbb","ccc"};
for(int i = 0; i < arr.length; i++){
System.out.println(arr[i]);
}
//下面讲一下<a href="https://www.baidu.com/s?wd=%E8%BF%AD%E4%BB%A3%E5%99%A8&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1d9P1wbmHRdmW9bnWcvnhDY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPW6kPWbkrj64PWRznWnznjbz" target="_blank" class="baidu-highlight">迭代器</a>的用户，<a href="https://www.baidu.com/s?wd=%E8%BF%AD%E4%BB%A3%E5%99%A8&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1d9P1wbmHRdmW9bnWcvnhDY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPW6kPWbkrj64PWRznWnznjbz" target="_blank" class="baidu-highlight">迭代器</a>比如：Iterator，用于迭代集合
List<String> list = new ArrayList<String>();
for(Iterator<String> it = list.iterator(); it.hasNext();){
String name = list.next();
System.out.println(name);
}
//其实ArrayList的底层就是一个数组，也可以使用循环来做
for(int i = 0; i < list.size(); i++){
System.out.println(list.get(i));
}