package com.test;
import java.util.Random;
public class GenerateRandomNumber {
public static void main(String[] args) {
System.out.println("生成的10为随机数为：" + getCharAndNumr(10));
}
/**
* java生成随机数字和字母组合
* @param length[生成随机数的长度]
* @return
*/
public static String getCharAndNumr(int length) {
String val = "";
Random random = new Random();
for (int i = 0; i < length; i++) {
// 输出字母还是数字
String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
// 字符串
if ("char".equalsIgnoreCase(charOrNum)) {
// 取得大写字母还是小写字母
int choice = random.nextInt(2) % 2 == 0 ? 65 : 97;
val += (char) (choice + random.nextInt(26));
} else if ("num".equalsIgnoreCase(charOrNum)) { // 数字
val += String.valueOf(random.nextInt(10));
}
}
return val;
}
}
转播
