统计字符串里数字，字母，空格数字

 

 @Test
    public void Test15() {

        String str1 ="Hello wfg , wangufui@sobey.com";
        char []arr = str1.toCharArray();
        int digital=0, character=0, blank=0, other=0;
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] >= '0' && arr[i] <= '9') {
                digital++;
            } else if ((arr[i] >= 'a' && arr[i] <= 'z') || (arr[i] >= 'A' && arr[i] <= 'Z')) {
                character++;
            } else if (arr[i] == ' ') {
                blank++;
            } else {
                other++;
            }
        }
        System.out.println("数字个数："+digital);
        System.out.println("英文字母个数："+character);
        System.out.println("空格个数："+blank);
        System.out.println("其他字符个数："+other);

    }