第六章第三十八题（生成随机字符）(Generate random characters) - 编程练习题答案

// https://cn.fankuiba.com
public class Ans6_38_page205 {
    public static void main(String[] args) {
        for (int count = 1; count <=100; count++) {
            System.out.print(getRandomUpperCaseLetter()+""+getRandomDigitCharacter());
            if (count * 2 % 10 == 0)
                System.out.println();
        }
    }
    public static char getRandomCharacter(char ch1, char ch2) {
        return (char)(ch1 + Math.random() * (ch2 - ch1 + 1));
    }

    /** Generate a random uppercase letter */
    public static char getRandomUpperCaseLetter() {
        return getRandomCharacter('A', 'Z');
    }

    /** Generate a random digit character */
    public static char getRandomDigitCharacter() {
        return getRandomCharacter('0', '9');
    }
}