Example usage for java.util Random Random

Introduction

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

Prototype

public Random()

Source Link

Document

Creates a new random number generator.

Usage

From source file:Main.java

private static int getRandom() {
    int index = new Random().nextInt(5);
    return randoms[index];
}

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.  java2 s.c o  m
    return array;
}

From source file:Main.java

static String GenRandomNumber(int iLen) {
    String s = "";
    for (int i = 0; i < iLen; ++i) {
        int r = new Random().nextInt(10);
        s += String.valueOf(r);/*from w  w w. jav a2s .  co  m*/
    }

    return s;
}

From source file:Main.java

public static int getRandomColor() {
    Random rnd = new Random();
    return Color.argb(50, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
}

From source file:Main.java

public static void random(int[] input) {

    for (int i = 0; i < input.length - 1; i++) {
        int randomIndex = new Random().nextInt(input.length - 1);
        int temp = input[randomIndex];
        // swap numbers
        input[randomIndex] = input[input.length - 1 - i];
        input[input.length - 1 - i] = temp;
    }/*from   w  w w  .  jav  a  2 s . co  m*/
}

From source file:Main.java

public static String getSharePicName(File cacheFile, String[] urls) {
    return cacheFile.getAbsolutePath() + new Random().nextInt(100000) + "." + urls[urls.length - 1];
}

From source file:Main.java

public static String RandomString(int length) {
    String AB = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    Random rnd = new Random();

    StringBuilder sb = new StringBuilder(length);
    for (int i = 0; i < length; i++) {
        sb.append(AB.charAt(rnd.nextInt(AB.length())));
    }/*  w ww  .  ja  va2s .  c  o m*/
    return sb.toString();

}

From source file:Main.java

public static int getRandomColor() {
    Random random = new Random();
    int alpha = random.nextInt(50) + 206;
    int red = random.nextInt(200);
    int green = random.nextInt(200);
    int blue = random.nextInt(200);
    return Color.argb(alpha, red, green, blue);
}

From source file:Main.java

private static String randomABC(int n) {
    String chars = "abcde0123456789";
    String res = "";
    Random rnd = new Random();
    int leng = chars.length();
    for (int i = 0; i < n; i++) {
        res = res + chars.charAt(rnd.nextInt(leng));

    }/*from   w w  w.ja  v a  2 s. c o  m*/
    return res;
}

From source file:Main.java

public static String generateRandomString(int len) {
    String str = "0123456789abcdefghijklmnopqrstuvwxyz";
    Random rnd = new Random();
    StringBuilder sb = new StringBuilder(len);
    for (int i = 0; i < len; i++) {
        sb.append(str.charAt(rnd.nextInt(str.length())));
    }//  ww w  .  j  a va  2  s  .co m
    return sb.toString();
}