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:WaitComm.java

public void run() {
    for (int i = 0; i < 5; i++) {
        synchronized (this) {
            while (isValid) {
                try {
                    this.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }//from ww  w .j av  a2  s  .co  m
            }
        }
        theValue = (int) (Math.random() * 256);
        System.out.println("sending " + theValue);
        synchronized (this) {
            isValid = true;
            this.notify();
        }
    }
}

From source file:com.springinpractice.ch14.kite.sample.service.impl.Flakinator.java

public void simulateFlakiness() {
    if (up) {//from ww  w . ja  v  a2  s .  co m
        if (Math.random() < 0.05) {
            this.up = false;
        }
    } else {
        if (Math.random() < 0.2) {
            this.up = true;
        }
    }

    if (!up) {
        throw new RuntimeException("Oops, service down");
    }
}

From source file:email.cadastro.EmailCadastro.java

public String geraCodConfirmacao() {
    int random;//from   ww w. j  a  v a  2s.co  m
    String cod = "";
    boolean v = false;
    for (int i = 0; i < 8; i++) {
        v = false;
        do {
            random = (int) (Math.random() * 122);
            if (random >= 48 && random <= 57)
                v = true;
            else if (random >= 97 && random <= 122)
                v = true;
            else if (random >= 65 && random <= 90)
                v = true;
        } while (!v);
        //System.out.print((char) random + "");
        cod += (char) random;
    }
    //System.out.println(cod);

    return cod;
}

From source file:org.jfree.chart.demo.BoxAndWhiskerChartDemo2.java

private static List<Double> createValueList(double d, double d1, int i) {
    ArrayList<Double> arraylist = new ArrayList<Double>();
    for (int j = 0; j < i; j++) {
        double d2 = d + Math.random() * (d1 - d);
        arraylist.add(new Double(d2));
    }/*w w  w. ja  va 2  s.c  om*/

    return arraylist;
}

From source file:com.phoenixst.plexus.examples.RandomGraphFactory.java

/**
 *  Creates a random graph with <code>n</code> nodes where each
 *  pair of nodes has probability <code>prob</code> of having an
 *  edge between them.//from  w  w w  .  j  av  a 2 s  . c om
 */
public static Graph createStandardGraph(int n, double prob) {
    if (prob < 0.0 || prob > 1.0) {
        throw new IllegalArgumentException("Probability must be between 0.0 and 1.0, inclusive.");
    }
    Graph graph = new DefaultGraph(new EmptyGraph(n));
    for (int head = 1; head < n; head++) {
        Object headNode = new Integer(head);
        for (int tail = 0; tail < head; tail++) {
            if (Math.random() < prob) {
                graph.addEdge(null, new Integer(tail), headNode, true);
            }
        }
    }
    return graph;
}

From source file:net.duckling.ddl.util.EncodeUtil.java

private static int getRandomNumber() {
    double a = Math.random() * 10;
    a = Math.ceil(a);/*from www .  java  2s .  c om*/
    int decimal = new Double(a).intValue();
    return decimal % 10;
}

From source file:TimerBasedAnimation.java

public void reset(int w, int h) {
    maxSize = w / 10;
    setXY(maxSize * Math.random(), w, h);
}

From source file:org.example.fis.MyTransformer.java

public String transform() {
    // let's return a random string
    StringBuffer buffer = new StringBuffer();
    for (int i = 0; i < 3; i++) {
        int number = (int) (Math.round(Math.random() * 1000) % 10);
        char letter = (char) ('0' + number);
        buffer.append(letter);/*w w  w .j  a  v  a 2  s. com*/
    }
    return buffer.toString();
}

From source file:boutiqueenligne.service.CalculPrixTotalAvecPromoService.java

public void generationCodePromo(int valeur, TypeCode TypeCode) {
    CodePromo code = new CodePromo();
    String chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
    String codeg = "";
    for (int x = 0; x < 5; x++) {
        int i = (int) Math.floor(Math.random() * 36);
        codeg += chars.charAt(i);/*  www .  j  a  v  a 2  s .  c o m*/
    }
    code.setCode(codeg);
    code.setType(TypeCode);
    code.setValeur(valeur);
    codePromoService.save(code);
}

From source file:com.b5m.user.frame.util.DateUtils.java

public static String getRandomInteger() {
    int temp = (int) (Math.random() * 9999);
    return String.valueOf(temp);
}