Java Random String generateRandomString(int length)

Description

generate Random String

License

Open Source License

Declaration

public static String generateRandomString(int length) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.*;

public class Main {
    private static final Random random = new Random();

    public static String generateRandomString(int length) {
        char[] characters = new char[length];
        for (int i = 0; i < length; i++) {
            char start, end;
            switch (random.nextInt(4)) {
            case 0:
                start = 'A';
                end = 'Z';
            case 1:
                start = '0';
                end = '9';
            default:
                start = 'a';
                end = 'z';
            }//from w ww .j a v  a  2s. c o  m
            characters[i] = (char) (start + random.nextInt(end - start));
        }
        return new String(characters);
    }
}

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