generate random string in java
import java.util.Random;
public class Generator {
public static String generateRandomPassword(int len) {
String chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijk"
+"lmnopqrstuvwxyz!@#$%&";
Random rnd = new Random();
StringBuilder sb = new StringBuilder(len);
for (int i = 0; i < len; i++)
sb.append(chars.charAt(rnd.nextInt(chars.length())));
return sb.toString();
}
}generate 5 digit random string in java
RandomStringUtils.randomAlphanumeric(17).toUpperCase()how to generate random large string in java
// Java program generate a random
// UpperCase or LowerCase or Number String
import java.util.*;
public class GFG {
static String getAlphaNumericString(int n)
{
// lower limit for LowerCase Letters
int lowerLimit = 97;
// lower limit for LowerCase Letters
int upperLimit = 122;
Random random = new Random();
// Create a StringBuffer to store the result
StringBuffer r = new StringBuffer(n);
for (int i = 0; i < n; i++) {
// take a random value between 97 and 122
int nextRandomChar = lowerLimit
+ (int)(random.nextFloat()
* (upperLimit - lowerLimit + 1));
// append a character at the end of bs
r.append((char)nextRandomChar);
}
// return the resultant string
return r.toString();
}
public static void main(String[] args)
{
// size of random alphanumeric string
int n = 20;
// Get and display the alphanumeric string
System.out.println(getAlphaNumericString(n));
}
}Copyright © 2021 Codeinu
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