Java Random String generateRandomString(String str, int length)

Description

generate Random String

License

Apache License

Declaration

public static String generateRandomString(String str, int length) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.Random;

public class Main {
    private static final Random _RAND = new Random(System.currentTimeMillis());
    private static final String _CHARTECER = "ABCDEFGHIJKLMNOPUVWXYZ0123456789";

    public static String generateRandomString(String str, int length) {
        String encoder = null;/*from w  ww .  j  a  va  2 s .c o m*/
        if (str == null || str.trim().length() == 0) {
            encoder = _CHARTECER;
        } else {
            encoder = str.trim();
        }
        StringBuilder randomString = new StringBuilder();
        int limit = encoder.length();
        for (int index = 0; index < length; index++) {
            randomString.append(encoder.charAt(_RAND.nextInt(limit)));
        }
        return randomString.toString();
    }
}

Related

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2. generateRandomString(int wordsLength, String separator)
3. generateRandomString(Random random, int length)
4. generateRandomString(Random random, int size)
5. generateRandomString(Random rnd, char[] alphabet, int maxLength)
6. genRandomString()
7. genRandomString(final int length)
8. genRandomString(int count)
9. getDefaultRandomName(String namePrefix)