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

/**
 * Get a random number within a given upper limit;
 *///from   w w  w . j  ava2 s  .c o  m
public static int getRandomInt(int max) throws Exception {
    int ret;
    Random r = new Random();
    ret = r.nextInt(max);

    Log.i(TAG, String.format("Generate an integer value: %d", ret));

    return ret;
}

From source file:Main.java

public static GradientDrawable createBackgroundRandom() {
    Random rnd = new Random();
    int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
    GradientDrawable gd = new GradientDrawable();
    gd.setColor(color);//  www. j a  v a2  s. c o m
    gd.setCornerRadius(5);
    gd.setAlpha(90);
    return gd;
}

From source file:Main.java

public static int[] sortearCores() {

    Random r = new Random();

    return new int[] { coresSecretas[r.nextInt(7)], coresSecretas[r.nextInt(7)], coresSecretas[r.nextInt(7)] };
}

From source file:Main.java

public static int getRandomColor() {
    Random rand = new Random();
    return Color.argb(100, rand.nextInt(256), rand.nextInt(256), rand.nextInt(256));
}

From source file:Main.java

public static String getRandomRGB() {
    String r, g, b;//  w  ww.j a v a 2  s . c o  m
    Random random = new Random();
    r = Integer.toHexString(random.nextInt(256)).toUpperCase();
    g = Integer.toHexString(random.nextInt(256)).toUpperCase();
    b = Integer.toHexString(random.nextInt(256)).toUpperCase();
    r = r.length() == 1 ? "0" + r : r;
    g = g.length() == 1 ? "0" + g : g;
    b = b.length() == 1 ? "0" + b : b;
    return "#" + (r + g + b);
}

From source file:Main.java

public static String getRandColorCode() {
    String r, g, b;/*from w  ww  .j a  v  a  2 s .c  o m*/
    Random random = new Random();
    r = Integer.toHexString(random.nextInt(256)).toUpperCase();
    g = Integer.toHexString(random.nextInt(256)).toUpperCase();
    b = Integer.toHexString(random.nextInt(256)).toUpperCase();
    r = r.length() == 1 ? "0" + r : r;
    g = g.length() == 1 ? "0" + g : g;
    b = b.length() == 1 ? "0" + b : b;
    return r + g + b;
}

From source file:Main.java

public static Integer[] randomIntArray(int size) {

    Integer a[] = new Integer[size];
    HashSet<Integer> set = new HashSet<>();
    for (int x = 0; x < a.length; x++) {

        Random r = new Random();
        Integer i = r.nextInt(size * 10);

        while (set.contains(i)) {
            i = r.nextInt(size);/*from   w ww  .j ava  2s. co m*/
        }
        set.add(i);
        a[x] = i;
    }
    return a;
}

From source file:Main.java

public static int randomRGB() {
    String r, g, b;// w  w w. j  a va  2 s  . c o m
    Random random = new Random();
    r = Integer.toHexString(random.nextInt(256)).toUpperCase();
    g = Integer.toHexString(random.nextInt(256)).toUpperCase();
    b = Integer.toHexString(random.nextInt(256)).toUpperCase();
    r = r.length() == 1 ? "0" + r : r;
    g = g.length() == 1 ? "0" + g : g;
    b = b.length() == 1 ? "0" + b : b;
    return Color.parseColor("#" + (r + g + b));
}

From source file:Main.java

/**
 * Create a random string hex color.//w  w w .j a  v  a  2 s  . c o  m
 * @return string hex color
 */
public static String randomHex() {
    Random rnd = new Random();
    return String.format("#%02X%02X%02X", rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
}

From source file:com.dianping.dpsf.other.echo.SimpleEchoClient.java

private static List<String[]> generateHostList() {
    List<String[]> hostList = new ArrayList<String[]>();
    hostList.add(new String[] { "127.0.0.1", "20001" });
    hostList.add(new String[] { "127.0.0.1", "20002" });
    hostList.add(new String[] { "127.0.0.1", "20003" });

    Random rnd = new Random(System.currentTimeMillis());
    int num = rnd.nextInt(3) + 1;
    Collections.shuffle(hostList);
    return hostList.subList(0, num);
}