201671010118 2016-2017-2 "Java Program design" Fourth Week learning experience

It is the fourth week to learn Java lessons, but there are still many deficiencies, the teacher lets write a program "read an integer from the keyboard, such as 123 (not limited to the number), and then separate the integer of each digit to output, the number of empty one space, and each number plus total sum." "To do this problem, just started using the Int method, later teachers we use String valueOf (num) and Charat (index) to write this program, I am not very familiar with string valueOf (num), the teacher told the problem of the algorithm, I do not understand." This week's Java homework I do not do programming problems, I think I mastered too little, I hope the teacher can speak slowly, I understand the procedure is not enough, the completion of the operation is not good.

201671010118 2016-2017-2 "Java Program design" Fourth Week learning experience