Example usage for java.util Random nextInt

Introduction

In this page you can find the example usage for java.util Random nextInt.

Prototype

public int nextInt(int bound)

Source Link

Document

Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.

Usage

From source file:Main.java

/**
 * Gets random string//w  w  w. ja v a2 s  .  co m
 *
 * @param length String length
 * @return Random string
 */
public static String getRandomString(int length) {
    char[] chars = "ABCDEFGHIJKLMONPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".toCharArray();
    StringBuilder builder = new StringBuilder();
    Random random = new Random();
    for (int i = 0; i < length; i++) {
        char c = chars[random.nextInt(chars.length)];
        builder.append(c);
    }
    return builder.toString();
}

From source file:Main.java

public static int[] getRandomArray(int length, int max) {
    int[] randArray = new int[length];
    Random rand = new Random();
    for (int i = 0; i < length; i++) {
        randArray[i] = rand.nextInt(max);
    }//from ww w .  j  a v a2s  .  co m
    Arrays.sort(randArray);
    for (int i = 1; i < length; i++) {
        if (randArray[i] == randArray[i - 1]) {
            randArray[i] += 1;
        }
    }
    for (int i = length - 1; i > 0; i--) {
        if (randArray[i] == randArray[i - 1]) {
            randArray[i - 1] -= 1;
        }
    }
    return randArray;

}

From source file:alfio.util.PasswordGenerator.java

public static String generateRandomPassword() {
    if (DEV_MODE) {
        return "abcd";
    }/*  w w  w. j av a 2  s. c o m*/
    Random r = new Random();
    int length = MIN_LENGTH + r.nextInt(MAX_LENGTH - MIN_LENGTH + 1);
    return RandomStringUtils.random(length, PASSWORD_CHARACTERS);
}

From source file:Main.java

/**
 * @author TheMrMilchmann//w  w  w . ja v a  2s  .  c om
 * @since DerpieLang v1.0.0
 */
public static final <T> T[] fillRandomly(T[] from, T[] into, long seed) {
    Random random = new Random(seed);

    for (int i = 0; i < into.length; i++) {
        into[i] = from[random.nextInt(from.length)];
    }

    return into;
}

From source file:Main.java

static int randomNumber(int first, int second) {
    Random r = new Random();
    int bigger = Math.max(first, second);
    int smaller = Math.min(first, second);
    return r.nextInt(bigger - smaller + 1) + smaller;
}

From source file:Main.java

public static String generateString(int length) {

    StringBuilder tmp = new StringBuilder();
    for (char ch = '0'; ch <= '9'; ++ch)
        tmp.append(ch);/*  w  ww  .jav  a 2 s.  c  o  m*/
    for (char ch = 'a'; ch <= 'z'; ++ch)
        tmp.append(ch);
    char[] symbols = tmp.toString().toCharArray();
    char[] buf = new char[length];
    Random random = new Random();

    for (int idx = 0; idx < buf.length; ++idx)
        buf[idx] = symbols[random.nextInt(symbols.length)];
    return new String(buf);
}

From source file:edu.buffalo.fusim.ExtractSeq.java

public static StringBuffer randomSequence(int maxLen) {
    Random r = new Random();

    // Chose a random length
    int length = r.nextInt(maxLen) + 1;

    StringBuffer seq = new StringBuffer();
    for (int i = 0; i < length; i++) {
        seq.append(bases[r.nextInt(bases.length)]);
    }//ww  w.  java2  s .  c  o m

    return seq;
}

From source file:Main.java

public static int ramdomMinMax(int min, int max) {

    Random random = new Random();

    int rs = -1;/*from w  w  w . j  a  v a 2s.  com*/

    while (rs < min || rs > max) {

        rs = random.nextInt(max);
    }

    return rs;
}

From source file:GenerateWorkItems.java

private static Integer getRandomObjectIdFromList(List beanList) {
    Random generator = new Random();
    int random = generator.nextInt(beanList.size());
    return ((IBeanID) beanList.get(random)).getObjectID();
}

From source file:outfox.dict.contest.test.InitSingerData.java

public static String getRandomCity() {
    String[] arr = { "", "", "", "", "?", "" };
    Random rand = new Random();
    int index = rand.nextInt(arr.length);
    return arr[index];
}