实施例

Question

我想生成类似的随机数

ADF1845CFT
ADF1864ATY
ADF18AT65Y

注意：我修复了ADF18 我只想接下来的5位数字和包机

我成功创建了带数字的5位数

我正在使用各种解决方案

等。方法

通过这些方法，我可以创建成功的随机5位数字。

任何帮助感谢......

Answer 1

你可以使用随机UUID ......

实施例

buttonDevs

Answer 2

您可以使用apache commons-lang RandomStringUtils.randomAlphanumberic：

"ADF18" + RandomStringUtils.randomAlphanumberic(5);

Answer 3

   String random5Digts = UUID.randomUUID().toString().substring(0, 5);
   String randomNumber="ADF18"+random5Digts;
   //code to change lower letters to uppercase
   StringBuilder sb = new StringBuilder(randomNumber);
   for (int index = 0; index < sb.length(); index++) {
       char c = sb.charAt(index);
       if (Character.isLowerCase(c)) {
           sb.setCharAt(index, Character.toUpperCase(c));
       }
   }
   System.out.println(sb.toString());

Answer 4

import java.util.Random;

public class MyStringRandomGen {

private static final String CHAR_LIST =
    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
private static final int RANDOM_STRING_LENGTH = 5;// change the number as u want.

/**
 * This method generates random string
 * @return
 */
public String generateRandomString(){

    StringBuffer randStr = new StringBuffer();
    for(int i=0; i<RANDOM_STRING_LENGTH; i++){
        int number = getRandomNumber();
        char ch = CHAR_LIST.charAt(number);
        randStr.append(ch);
    }
    return randStr.toString();
}

/**
 * This method generates random numbers
 * @return int
 */
private int getRandomNumber() {
    int randomInt = 0;
    Random randomGenerator = new Random();
    randomInt = randomGenerator.nextInt(CHAR_LIST.length());
    if (randomInt - 1 == -1) {
        return randomInt;
    } else {
        return randomInt - 1;
    }
}

public static void main(String a[]){
    MyStringRandomGen msr = new MyStringRandomGen();
    System.out.println(msr.generateRandomString());
    System.out.println(msr.generateRandomString());
    System.out.println(msr.generateRandomString());
    System.out.println(msr.generateRandomString());
    System.out.println(msr.generateRandomString());
    System.out.println(msr.generateRandomString());
    System.out.println(msr.generateRandomString());
}
}

如何创建5位数字和包机组合的随机数

4 个答案:

实施例