java生成八位纯英文的随机数

可以使用Java的Random类和StringBuilder类来生成八位纯英文的随机数。具体实现代码如下：

import java.util.Random;

public class RandomStringGenerator {
    public static void main(String[] args) {
        String randomString = generateRandomString(8);
        System.out.println("Random string: " + randomString);
    }

    public static String generateRandomString(int length) {
        String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
        StringBuilder builder = new StringBuilder();
        Random random = new Random();
        for (int i = 0; i < length; i++) {
            int index = random.nextInt(characters.length());
            builder.append(characters.charAt(index));
        }
        return builder.toString();
    }
}

运行结果：

Random string: XrTQrKZo