Java利用Math.random()方法随机生成A-Z的字符

package reverse;
import java.text.DecimalFormat;
public class Reverse {
    public static void main(String[] args)
    {
        int i=1;
        while(i<=100)
        {
            char c=(char)('A'+Math.random()*('Z'-'A'+1));
            System.out.println(c);
            i++;
        }

    }
}