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

/**
 * Returns a random number between 0 and f.
 *///from  ww  w  .j a v  a2s  .c om
public static float random(float f) {
    return ((float) Math.random()) * f;
}

From source file:Main.java

public static int getRndNum(int min, int max) {
    return (int) Math.round((max - min) * Math.random() + min);
}

From source file:PrintWriterDemo.java

public static void main() throws Exception {
    PrintWriter pw = new PrintWriter(new FileWriter("dice.txt"));
    for (int i = 1; i <= 1000; i++) {
        int die = (int) (1 + 6 * Math.random());
        pw.print(die);//from   w  ww .  j a v  a 2  s  .  c o  m
        pw.print(' ');
        if (i % 20 == 0)
            pw.println();
    }
    pw.println();
    pw.close(); // Without this, the output file may be empty
}

From source file:Main.java

public static int random(int max) {
    return (int) (Math.random() * max);
}

From source file:Main.java

/**
 * Calculate experience based on minimum experience provided by enemy...
 * @param baseExperience/*from w  ww  . j av a  2  s .c om*/
 * 
 */
public static int getGold(int baseGold) {
    float random = (float) Math.random();
    return (int) (baseGold + (baseGold * random));
}

From source file:Main.java

public static char[] getCheckChar(int textlength) {
    char[] tempCheckNum = new char[textlength];
    for (int i = 0; i < textlength; i++) {
        char charCode;
        if (Math.random() > 0.5d) {
            charCode = (char) (Math.random() * 26 + 'A');
        } else {//from   ww w .j  a va2s .com
            charCode = (char) (Math.random() * 10 + '0');
        }
        tempCheckNum[i] = charCode;
    }
    return tempCheckNum;
}

From source file:Main.java

public static int[] getLine(int width, int height) {
    int[] lineCoordinate = new int[4];
    for (int i = 0; i < 4; i += 2) {
        lineCoordinate[i] = (int) (Math.random() * width);
        lineCoordinate[i + 1] = (int) (Math.random() * height);
    }//from  w  w  w .  j  a va2s  .com
    return lineCoordinate;
}

From source file:TimerUtil.java

public final static void waitRandom(int time) {
    int waitTime = (int) (Math.random() * (double) time);
    try {//from w w w  .j  a  v  a  2 s.com
        Thread.sleep(waitTime);
    } catch (Exception e) {
    }
}

From source file:Main.java

public static int randomInt(int low, int high) {
    return (int) (Math.random() * (high - low)) + low;
}

From source file:Main.java

/**
 * Generated UID to anonymously identify users on GCM server.
 * @return/* ww  w .j  av  a  2 s. c  om*/
 */
public static String generateUid() {
    return Long.toHexString(Double.doubleToLongBits(Math.random()));
}