摇色子程序。首先可以选择色子的面数（比如6或者1０）。设定初始值后，摇动色子，得到新的点数。-1. a constructor that allows users of the class to specify the number of sides on each dice separately. In other words, the constructor has two input parameters.

2. methods that allow a user to set and get the face values of each dice object separately. For

instance, I could set the first dice s face value to 2 and the second dice s face value to 9

(assuming the second one is a 10-sided Dice).　

3. a single method that rolls both dice　

4. a method that returns the current sum of the face values on the dice　

5. a toString method that returns an informative descr iption, such as "first dice: value,

second dice: value" where value would be the current face value of that dice.