Example usage for java.lang Math random

Introduction

In this page you can find the example usage for java.lang Math random.

Prototype

public static double random()

Source Link

Document

Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0 .

Usage

From source file:Main.java

public static int getPositon(int height) {
    int tempPositoin = (int) (Math.random() * height);
    if (tempPositoin < 20) {
        tempPositoin += 20;/*from ww  w  . ja v a2 s.c  o m*/
    }
    return tempPositoin;
}

From source file:Main.java

public static int getPositon(int height) {
    int tempPositoin = (int) (Math.random() * height);
    if (tempPositoin < 25) {
        tempPositoin += 15;// ww  w . ja  va  2 s . c o m
    }
    //return tempPositoin;
    return height - 20;
}

From source file:Main.java

public static void randomSleep() {
    try {//from   ww  w.j a v a2 s . c om
        Thread.sleep((long) (Math.random() * 3000));
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static final float randomInRange(float min, float max) {
    return (float) (Math.random() < 0.5 ? ((1 - Math.random()) * (max - min) + min)
            : (Math.random() * (max - min) + min));
}

From source file:Main.java

private static String generateBrand() {

    Long result = Math.round(Math.random() * 2);

    switch (result.intValue()) {
    case 0://ww  w . j  av  a 2  s.co m
        return "Heineken";
    case 1:
        return "Grimbergen";
    case 2:
        return "Kriek";
    default:
        break;
    }

    return null;
}

From source file:Main.java

public static int getRandomColor() {
    int red = (int) (Math.random() * 255);
    int green = (int) (Math.random() * 255);
    int blue = (int) (Math.random() * 255);
    return Color.rgb(red, green, blue);
}

From source file:Main.java

public static char randomDecimalDigit() {
    return digits[(int) Math.floor(Math.random() * 10)];
}

From source file:Main.java

public static float genRand(float min, float max) {
    return (float) Math.random() * (max - min) + min;
}

From source file:Main.java

public static int buildRandom(int length) {
    int num = 1;//from  w w  w. j  a  v  a  2 s  .  co  m
    double random = Math.random();
    if (random < 0.1) {
        random = random + 0.1;
    }
    for (int i = 0; i < length; i++) {
        num = num * 10;
    }
    return (int) ((random * num));
}

From source file:Main.java

public static String getRandomString(int len) {
    String str = (Long.toHexString(Double.doubleToLongBits(Math.random()))).substring(0, len);
    return str;//  w  w w .j  a  v a  2  s. c  om
}