java小程序。猜数字游戏：随机产生一个100以内的正整数，用户通过键盘输入所猜的数字，并给与相应的提示（有代码详细解释）-java applet. Guessing game: random positive integer less than a 100, guess the number of the user through the keyboard input, and give the corresponding prompt (with the code explained in detail)