关于java：如何创建5位数字和数字组合的随机数

How to create Random number with 5 digit combined of number and charter

我想生成这样的随机数

ADF1845CFT
ADF1864ATY
ADF18AT65Y

Note: There I FIX the ADF18 I want only take the next 5 digit with number and charter

我成功创建了带数字的5位数字

我正在使用各种解决方案

如何组合随机数矩阵
具有给定长度的Java随机数

等方法

通过这些方法，我创建了成功的随机5位数字。

任何帮助欣赏......

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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());
}
}

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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());

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

1	"ADF18" + RandomStringUtils.randomAlphanumberic(5);