程序3-4
1 class SwitchTest{
2 public static void main(String [] args) {
3 char ch = args[0].charAt(0);
4 switch (ch) {
5 case '0',case '1',case '2',case '3':
6 case '4',case '5',case '6',case '7':
7 case '8',case '9',
8 System.out.println(
9 "The character is digit " + ch);
10 break;
11
12 case 'a',case 'b',case 'c',case 'd':
13 case 'e',case 'f',case 'g',case 'h':
14 case 'i',case 'j',case 'k',case 'l':
15 case 'm',case 'n',case 'o',case 'p':
16 case 'q',case 'r',case 's',case 't':
17 case 'u',case 'v',case 'w',case 'x':
18 case 'y',case 'z',
19 System.out.println(
20 "The char is lowercase letter " + ch);
21 break;
22
23 case 'A',case 'B',case 'C',case 'D':
24 case 'E',case 'F',case 'G',case 'H':
25 case 'I',case 'J',case 'K',case 'L':
26 case 'M',case 'N',case 'O',case 'P':
27 case 'Q',case 'R',case 'S',case 'T':
28 case 'U',case 'V',case 'W',case 'X':
29 case 'Y',case 'Z',
30 System.out.println(
31 "The char is uppercase letter " + ch);
32 break;
33 default,System.out.println("The character" + ch
34 + " is neither a digit nor a letter.");
35 }
36 }
37 }