Can be implemented using the random() function and valueOf() function.
The random() method is used to return a random number, the range of random numbers is 0.0 =
valueOf(char c): method is used to return the string representation of the char parameter.
(Recommended video tutorial: java video)
The specific code is as follows:
public String getlinkNo() {
String linkNo = "";
// 用字符数组的方式随机
String model = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
char[] m = model.toCharArray();
for (int j = 0; j < 6; j++) {
char c = m[(int) (Math.random() * 36)];
// 保证六位随机数之间没有重复的
if (linkNo.contains(String.valueOf(c))) {
j--;
continue;
}
linkNo = linkNo + c;
}
return linkNo;
}Recommended tutorial: Getting started with java development
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