get Random Letter Lower Case - Java java.util

Java examples for java.util:Random String

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Description

get Random Letter Lower Case

Demo Code


//package com.java2s;

public class Main {

    private static final String ALPHA_NUMERIC = "ABCDEFGHJKLMNPQRSTUVWXYZ123456789";

    public static String getRandomLetterLowerCase(int length) {
        return getRandomLetter(length).toLowerCase();
    }//from w ww  .  j av a2s . co m

    public static String getRandomLetter(int length) {
        char[] randomBytes = new char[length];
        for (int i = 0; i < length; i++) {
            randomBytes[i] = ALPHA_NUMERIC.charAt(getRangeRandom(0,
                    ALPHA_NUMERIC.length() - 1));
        }
        return new String(randomBytes);
    }

    public static int getRangeRandom(int min, int max) {
        return (int) (Math.random() * (max - min + 1) + min);
    }

    public static int getRangeRandom(int max) {
        return (int) (Math.random() * (double) max);
    }
}

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