遍历数组、集合的三种方式

int [] array = new int[]{2,3,4,5,6,8};
//普通for循环
for (int i = 0; i < array.length; i++) {
System.out.println(array[i]);
}
//增强for循环
for (int i : array) {
System.out.println(i);
}
//使用迭代器
List<Integer> list = new ArrayList<Integer>();
list.add(1);
list.add(3);
Iterator<Integer> iterator = list.iterator();
while (iterator.hasNext()) {
Integer i = iterator.next();
System.out.println(i);
}