使ArrayList大小等于其他数组列表在Java中可用

I have 2 ArrayLists of varying sizes. Example - Array1.size() = 10 Array2.size() = 5 I want at all times these arrays to have same size. Thus, I have another class to ensure this. But obviously, it isn't working for me. Please help! Below is that Class code -I have 2 ArrayLists of varying sizes. Example -