Character包装类

* Character char的包装类

方法：
*    isLowerCase(char a)是否为小写字母
*    isUpperCase(char a)是否为大写字母
*    isDigit(char a )是否为数字

 1 package characterdemo;
 2 /**
 3  *  Character char的包装类
 4  *    isLowerCase(char a)是否为小写字母
 5  *    isUpperCase(char a)是否为大写字母
 6  *    isDigit(char a )是否为数字
 7  * @author star
 8  *
 9  */
10 public class CharacterDemo {
11     public static void main(String[] args) {
12         String s = "abcABC0123+-*/";
13         //字符串转换成字符数组
14         char[] ch = s.toCharArray();
15         
16         int u_count = 0;
17         int l_count = 0;
18         int n_count = 0;
19         int o_count = 0;
20         
21         //遍历
22         for (int i = 0; i < ch.length; i++) {
23             if (Character.isLowerCase(ch[i])) {
24                 l_count++;
25             } else if(Character.isUpperCase(ch[i])) {
26                 u_count++;
27             }else if (Character.isDigit(ch[i])) {
28                 n_count++;
29             } else {
30                 o_count++;
31             }
32         }
33         System.out.println("小写字母"+l_count+"大写字母"+u_count+"数字"+n_count+"其他"+o_count);
34     }
35 }