产生0-9 A-Z a-z

》题目要求：

　　》》产生26个大写字母

　　》》产生26个小写字母

　　》》产生0-9这10个阿拉伯数字

》程序实现：

 1 package cn.fury.test;
 2 
 3 
 4 public class Test{
 5     public static void main(String[] args) {
 6         System.out.println((int)'a' + " " + (int)'z' + " " + (int)'A' + " " + (int)'Z');
 7         for(char i = 'a'; i <= 'z'; i++){
 8             System.out.print("\'" + i + "\'" + ",");
 9         }
10         System.out.println();
11         for(char i = 'A'; i <= 'Z'; i++){
12             System.out.print("\'" + i + "\'" + ",");
13         }
14         System.out.println();
15         for(char i = '0'; i <= '9'; i++){
16             System.out.print("\'" + i + "\'" + ",");
17         }
18         System.out.println();
19         char [] alphabet = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n',
20                 'o','p','q','r','s','t','u','v','w','x','y','z','A','B','C','D',
21                 'E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T',
22                 'U','V','W','X','Y','Z','0','1','2','3','4','5','6','7','8','9'};
23         System.out.println(alphabet.length);
24     }
25 }

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