如何将字符串转换成数字并排序?

Could somebody tell me the way to break down problem. The requirement is display a menu with choice bubble sort, insertion sort. Allow user to input infinite number and sort those numbers base on their choice. I am lost. This is the code I have been working on. I am confused how to let user input a String and split them to int and sort them, and how can we output the result in toString().Could somebody tell me the way to break down pr