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

public static String myUUID() {
    StringBuilder sb = new StringBuilder();
    int start = 48, end = 58;
    appendChar(sb, start, end);/*from  ww  w .j av  a2s.co m*/
    appendChar(sb, 65, 90);
    appendChar(sb, 97, 123);
    String charSet = sb.toString();
    StringBuilder sb1 = new StringBuilder();
    for (int i = 0; i < 24; i++) {
        int len = charSet.length();
        int pos = new Random().nextInt(len);
        sb1.append(charSet.charAt(pos));
    }
    return sb1.toString();
}

From source file:Main.java

public static <T> T pickRandomItem(List<T> items) {
    return items.get(new Random().nextInt(items.size()));
}

From source file:Gesture.java

public static void generateDraw(Gesture gesture) {
    final Random random = new Random();
    final int computerDraw = random.nextInt(3);
    System.out.println(computerDraw);

    if (computerDraw > gesture.getType()) {
        System.out.println("You lose.");
    } else if (computerDraw < gesture.getType()) {
        System.out.println("You win.");
    } else {/*  w  w  w .  ja  v a2 s . c  o m*/
        System.out.println("It is a tie.");

    }
}

From source file:Main.java

/**
 * Gets random string/*from  w  ww . j a  v  a2 s.  c  o 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 String getText(Document doc, String tagName, boolean flag) {

    NodeList nodeList = doc.getElementsByTagName(tagName);
    int leng = nodeList.getLength();
    if (leng <= 0)
        return "";

    Random rnd = new Random();
    int ran = rnd.nextInt(leng);

    return nodeList.item(ran).getTextContent();
}

From source file:Main.java

/**
 * Shuffle an array./* w  w  w  .j  a  va  2s  . co m*/
 * @param array Array.
 */
private static void Shuffle(int[] array) {
    Random random = new Random();
    for (int i = array.length - 1; i > 0; i--) {
        int index = random.nextInt(i + 1);
        int temp = array[index];
        array[index] = array[i];
        array[i] = temp;
    }
}

From source file:Main.java

private static float randomInRange(float min, float max) {

    float randomFloat = new Random().nextFloat();
    return randomFloat < 0.5 ? ((1 - randomFloat) * (max - min) + min) : (randomFloat * (max - min) + min);
}

From source file:Main.java

public static int randInt(int min, int max) {
    Random rand = new Random();
    return rand.nextInt((max - min) + 1) + min;
}

From source file:Main.java

public static String getRandom(char[] sourceChar, int length) {
    if (sourceChar == null || sourceChar.length == 0 || length < 0) {
        return null;
    }// ww  w  . j  a va  2s. c  om

    StringBuilder str = new StringBuilder(length);
    Random random = new Random();
    for (int i = 0; i < length; i++) {
        str.append(sourceChar[random.nextInt(sourceChar.length)]);
    }
    return str.toString();
}

From source file:Main.java

public static int getRandomNumber(int min, int max) {
    return new Random().nextInt(max) % (max - min + 1) + min;
}