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()

Source Link

Document

Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.

Usage

From source file:Main.java

/** Returns a random integer between 0 and n-1 */
public static int nextInt(int n) {
    Random rand = new Random(seed);
    return Math.abs(rand.nextInt()) % n;
}

From source file:Main.java

private static String getOutTradeNo() {
    SimpleDateFormat format = new SimpleDateFormat("MMddHHmmss", Locale.getDefault());
    Date date = new Date();
    String key = format.format(date);

    Random r = new Random();
    key = key + r.nextInt();
    key = key.substring(0, 15);//from   ww w .java2  s.c om
    return key;
}

From source file:Main.java

public static String getRandomColor() {
    Random rand = new Random();
    Integer randomColor = Color.rgb(rand.nextInt(), rand.nextInt(), rand.nextInt());
    return randomColor.toString();
}

From source file:Main.java

public static int getRandom() {
    Random ran = new Random(System.currentTimeMillis());
    int ret = ran.nextInt();
    ret = Math.abs(ret);/*  ww  w  . j  a v  a 2s .  com*/
    return ret;
}

From source file:Main.java

public static String getRandomFileName(String filePath) {
    SimpleDateFormat format = new SimpleDateFormat("MMddHHmmss", Locale.getDefault());
    Date date = new Date();
    String key = format.format(date);

    Random r = new Random();
    key = key + r.nextInt();
    key = key.substring(0, 15);// w  ww  .j a  v  a2 s  .c o m
    return filePath + "/" + key + ".jpeg";
}

From source file:Main.java

public static int generateRandomColour(long seed) {
    Random random = new Random(seed);
    int color = Color.argb(random.nextInt(), random.nextInt(), random.nextInt(), random.nextInt());

    float[] hsv = new float[3];
    Color.colorToHSV(color, hsv);

    //Adjust the saturation value, less than 1 is darker, greater than 1 is brighter
    hsv[2] *= 0.8;/*  ww  w.  j a va  2s .c o  m*/
    return Color.HSVToColor(hsv);
}

From source file:Main.java

/**
 * @param min//  ww  w .  j  a v a  2 s  .co  m
 * @param max
 * @return
 */
public static String getYZM(final int min, final int max) {
    Random random = new Random();
    int randomnum = 0;
    int tmp = Math.abs(random.nextInt());
    randomnum = tmp % (max - min + 1) + min;
    return randomnum + "";
}

From source file:Main.java

private static void printPassword() {
    String UPPER = "ABCDEFGHIJKLMNPQRSTUVWXYZ";
    String LOWER = "abcdefghijklmnpqrstuvwxyz";
    String NUMBER = "123456789";
    String SPECIAL = "!@#$%&*+?";
    Random randGen = new Random();

    StringBuffer buf = new StringBuffer();
    buf.append(LOWER.charAt(Math.abs(randGen.nextInt()) % LOWER.length()));
    buf.append(LOWER.charAt(Math.abs(randGen.nextInt()) % LOWER.length()));
    buf.append(NUMBER.charAt(Math.abs(randGen.nextInt()) % NUMBER.length()));
    for (int i = 0; i <= 4; i++) {
        buf.append(LOWER.charAt(Math.abs(randGen.nextInt()) % LOWER.length()));
    }/*from w ww.j  a  v  a 2 s  .  c o  m*/
    buf.append(UPPER.charAt(Math.abs(randGen.nextInt()) % UPPER.length()));
    buf.append(LOWER.charAt(Math.abs(randGen.nextInt()) % LOWER.length()));
    System.out.println(buf.toString());
}

From source file:Main.java

public static String generateString(int length) {
    StringBuffer sb = new StringBuffer();
    Random random = new Random();
    for (int i = 0; i < length; i++) {
        sb.append(random.nextInt());
    }/* ww w.  j  av  a2s.  c  om*/
    return sb.toString();
}

From source file:MainClass.java

private static void fillArray(Object array) {
    int length = Array.getLength(array);
    Random generator = new Random(System.currentTimeMillis());
    for (int i = 0; i < length; i++) {
        int random = generator.nextInt();
        Array.setInt(array, i, random);
    }//from ww  w  .  j av  a2 s  . c o  m
}