Java determines whether a character is a letter

java determines whether a character is a letter

1. First create a function check to receive a string

2. Then take the first character of the string. If it is in the range of a-z or A-Z, it is a letter, otherwise it is not

Recommended tutorial: java tutorial

 /**
     * 判断一个字符串是否为字母
     * @param fstrData
     * @return
     */
    public static boolean check(String fstrData) {
        char c = fstrData.charAt(0);
        if (((c >= &#39;a&#39; && c <= &#39;z&#39;) || (c >= &#39;A&#39; && c <= &#39;Z&#39;))) {
            return true;
        } else {
            return false;
        }
    }

Test:

public static void main(String[] args) {
    System.out.println(check("a")); // true
    System.out.println(check("1")); // false
}

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