摆脱java.util.Iterator

// 使用 for-each 循环遍历容器中的元素
List<String> strings = new ArrayList<>();
strings.add("Hello");
strings.add("World");
for (String s : strings) {
    System.out.println(s);
}

// 使用迭代器模式创建自定义容器
class MyIterator implements Iterator<Integer> {
    private int[] container;
    private int index;
    public MyIterator(int[] container) {
        this.container = container;
        this.index = 0;
    }
    @Override
    public boolean hasNext() {
        return index < container.length;
    }
    @Override
    public Integer next() {
        return container[index++];
    }
}