Java生成任意个个数的验证码

package com.day14string;

import java.util.Random;
import java.util.Scanner;

public class Test2 {
public static String getCheckCode() {
Random random = new Random();
Scanner scanner = new Scanner(System.in);
int x = scanner.nextInt();
String result = "";
String code = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890";
for (int i = 0; i < x; i++) {
int index = random.nextInt(code.length());
char c = code.charAt(index);
result += c;

}
return result;

}

public static void main(String[] args) {
Test2 test2 = new Test2();
while (true) {
System.out.println(test2.getCheckCode());
}
}
}