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

public static int[] generateUnsortedArray(int length, int maxValue) {
    int[] array = new int[length];
    Random r = new Random();
    for (int i = 0; i < length; i++) {
        array[i] = r.nextInt(maxValue) + 1; // Avoid 0 value for better drawing
    }/*from ww w . jav a 2s  .com*/
    return array;
}

From source file:Main.java

public static String getRandomNum() {
    StringBuffer sb = new StringBuffer();
    Random random = new Random();
    for (int i = 0; i < 3; i++) {
        sb.append(random.nextInt(9));
    }//  w w w. ja  v a2  s . c o m
    return sb.toString();
}

From source file:Main.java

public static int[] randNum(int num, int min, int max) {
    ArrayList<Integer> list = new ArrayList<Integer>();
    Random rand = new Random();
    while (true) {
        int rm = (rand.nextInt(max - min) + min);
        if (!list.contains(rm)) {
            list.add(rm);/*from  ww  w.j  a  v a 2 s.c om*/
            if (list.size() >= num)
                break;
        }
    }
    int result[] = new int[num];
    for (int i = 0; i < list.size(); i++) {
        result[i] = list.get(i);
    }
    return result;
}

From source file:Main.java

public static void shuffleArray(int[] array, Random rand) {

    for (int i = array.length; i > 1; i--) {
        int b = rand.nextInt(i);
        if (b != i - 1) {
            int e = array[i - 1];
            array[i - 1] = array[b];//from w ww .j ava  2s .  c om
            array[b] = e;
        }
    }

}

From source file:Main.java

public static int getRandomInt(int sek, int min, int max) {

    Random random = new Random();

    int temp = 0;

    do {//from   w w w  .j  ava 2s.  co m
        temp = random.nextInt(sek);
    } while (temp < min || temp > max);

    return temp;
}

From source file:Main.java

public static void changeRingtone(Context context) {
    SharedPreferences sharedPreferences = context.getSharedPreferences("randomizer", Context.MODE_PRIVATE);

    if (!sharedPreferences.getBoolean("active", false)) {
        return;/*w  w w .ja  v  a2  s  .  c  o  m*/
    } // END if

    RingtoneManager ringtoneManager = new RingtoneManager(context);
    Random random = new Random(System.currentTimeMillis());

    int count = random.nextInt(ringtoneManager.getCursor().getCount());

    RingtoneManager.setActualDefaultRingtoneUri(context, RingtoneManager.TYPE_RINGTONE,
            ringtoneManager.getRingtoneUri(count));
}

From source file:com.zb.app.common.util.SerialNumGenerator.java

private static String getSuffix(Long id) {
    Long num = 1l;// w ww . ja va2 s.  c om
    Random random = new Random();
    if (id != null) {
        num = id * (random.nextInt(1000));
        if (num < 100) {
            num = num * (random.nextInt());
        }
        num = (id * (random.nextInt(1000))) % 100000;// id??
    }

    StringBuffer suffixBuffer = new StringBuffer();
    suffixBuffer.append(String.valueOf(num)).append(random.nextInt(1000));
    return StringUtils.leftPad(suffixBuffer.toString(), 8, '0');
}

From source file:Main.java

public static int[] randomSort(int[] seed) {
    int len = seed.length;
    int[] result = new int[len];
    Random random = new Random();
    for (int i = 0; i < len; i++) {
        int r = random.nextInt(len - i);
        result[i] = seed[r];//w  ww.  ja va  2  s.  c  om
        seed[r] = seed[len - 1 - i];
    }
    return result;
}

From source file:Main.java

public static String getSixRandom() {
    String str = "";
    Random random = new Random();
    for (int i = 0; i < 6; i++) {
        int itmp = random.nextInt(26) + 65;
        char ctmp = (char) itmp;
        str += ctmp;//from  w w w . ja  v a 2 s. com
    }
    return str;
}

From source file:Main.java

public static <E> void shuffleInPlace(E[] elems, Random rand) {
    for (int j = elems.length - 1; j > 0; j--) {
        int randIndex = rand.nextInt(j + 1);
        E tmp = elems[randIndex];/*from   w ww .j  a va 2 s . c om*/
        elems[randIndex] = elems[j];
        elems[j] = tmp;
    }
}