java 判断一个字符中字母数字个数

public static void getCounts(String string) {        int count_abc=0, count_num=0, count_oth=0;        char[] chars = string.toCharArray();        //判断每个字符        for(int i = 0; i < chars.length; i++){            if((chars[i] >= 65 && chars[i] <= 90) || (chars[i] >= 97 && chars[i] <=122)){                count_abc++;            }else if(chars[i] >= 48 && chars[i] <= 57){                count_num++;            }else{                count_oth++;            }        }        System.out.PRintln("字母有：" + count_abc + "个");        System.out.println("数字有：" + count_num + "个");        System.out.println("其他的有：" + count_oth + "个");    }