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:com.ciphertool.genetics.algorithms.selection.modes.TournamentSelector.java

@Override
public int getNextIndex(List<Chromosome> individuals, Double totalFitness) {
    Collections.sort(individuals, fitnessComparator);

    for (int i = 0; i < individuals.size(); i++) {
        if (Math.random() <= selectionAccuracy) {
            return i;
        }/*w w  w  .  j  a va2 s  .c  o m*/
    }

    // return the least fit individual since it won the tournament
    return individuals.size() - 1;
}

From source file:com.awcoleman.ExampleJobSummaryLogWithOutput.utility.CreateBinaryDatafile.java

public String generateDatetime() {
    long offset = Timestamp.valueOf("2015-02-21 00:00:00").getTime();
    long end = Timestamp.valueOf("2015-02-24 00:00:00").getTime();
    long diff = end - offset + 1;
    Timestamp rand = new Timestamp(offset + (long) (Math.random() * diff));

    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddkkmmss.SSS");

    return sdf.format(rand);
}

From source file:ColorsBeanInfo.java

private Color randomColor() {
        int r = (int) (255 * Math.random());
        int g = (int) (255 * Math.random());
        int b = (int) (255 * Math.random());
        return new Color(r, g, b);
    }//from   w  w  w .  ja v  a 2 s.c o  m

From source file:net.fenyo.mail4hotspot.web.GMailOAuthStep1Servlet.java

private String nonce() {
    return new Integer(new Double(Math.random() * 100000000).intValue()).toString();
}

From source file:Main.java

private ObservableList<XYChart.Series<String, Double>> getChartData() {
    double aValue = 10;
    double cValue = 20;
    ObservableList<XYChart.Series<String, Double>> answer = FXCollections.observableArrayList();
    Series<String, Double> aSeries = new Series<String, Double>();
    Series<String, Double> cSeries = new Series<String, Double>();
    aSeries.setName("a");
    cSeries.setName("C");

    for (int i = 2001; i < 2021; i++) {
        aSeries.getData().add(new XYChart.Data(Integer.toString(i), aValue));
        aValue = aValue + Math.random() * 100 - 50;
        cSeries.getData().add(new XYChart.Data(Integer.toString(i), cValue));
        cValue = cValue + Math.random() * 100 - 50;
    }/*ww w  . j  a va  2s  .  co m*/
    answer.addAll(aSeries, cSeries);
    return answer;
}

From source file:net.floodlightcontroller.loadbalancer.LBPool.java

public LBPool() {
    id = String.valueOf((int) (Math.random() * 10000));
    name = null;//from   w ww.ja va 2s.  c o m
    tenantId = null;
    netId = null;
    lbMethod = 0;
    protocol = 0;
    members = new ArrayList<String>();
    monitors = new ArrayList<String>();
    adminState = 0;
    status = 0;
    previousMemberIndex = -1;
}

From source file:Charts2D.java

public Charts2D() {
    super("2D Charts");
    setSize(720, 280);//from w w  w . j  ava2 s.co  m
    getContentPane().setLayout(new GridLayout(1, 3, 10, 0));
    getContentPane().setBackground(Color.white);

    int[] xData = new int[8];
    int[] yData = new int[8];
    for (int i = 0; i < xData.length; i++) {
        xData[i] = i;
        yData[i] = (int) (Math.random() * 100);
        if (i > 0)
            yData[i] = (yData[i - 1] + yData[i]) / 2;
    }

    JChart2D chart = new JChart2D(JChart2D.LineChart, xData.length, xData, yData, "Line Chart");
    chart.setStroke(new BasicStroke(5f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER));
    chart.setLineColor(new Color(0, 28, 28));
    getContentPane().add(chart);

    chart = new JChart2D(JChart2D.ColumnChart, xData.length, xData, yData, "Column Chart");
    GradientPaint gp = new GradientPaint(0, 100, Color.white, 0, 300, Color.blue, true);
    chart.setGradient(gp);
    chart.setEffectIndex(JChart2D.Gradientffect);
    chart.setDrawShadow(true);
    getContentPane().add(chart);

    chart = new JChart2D(JChart2D.PieChart, xData.length, xData, yData, "Pie Chart");
    ImageIcon icon = new ImageIcon("largeJava2slogo.GIF");
    chart.setForegroundImage(icon.getImage());
    chart.setEffectIndex(JChart2D.ImageEffect);
    chart.setDrawShadow(true);
    getContentPane().add(chart);

    WindowListener wndCloser = new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }
    };
    addWindowListener(wndCloser);

    setVisible(true);
}

From source file:com.linkedin.pinot.common.utils.KafkaStarterUtils.java

public static KafkaServerStartable startServer(final int port, final int brokerId, final String zkStr,
        final Properties configuration) {
    return startServer(port, brokerId, zkStr, "/tmp/kafka-" + Double.toHexString(Math.random()), configuration);
}

From source file:Main.java

private ObservableList<XYChart.Series<Integer, Double>> getChartData() {
    double aValue = 1.56;
    double bValue = 1.06;
    ObservableList<XYChart.Series<Integer, Double>> answer = FXCollections.observableArrayList();
    Series<Integer, Double> aSeries = new Series<Integer, Double>();
    Series<Integer, Double> bSeries = new Series<Integer, Double>();
    aSeries.setName("A");
    bSeries.setName("B");
    for (int i = 2011; i < 2016; i++) {
        double diff = Math.random();
        aSeries.getData().add(new XYChart.Data(i, aValue, diff));
        aValue = aValue + 10 * diff - 5;
        diff = Math.random();//w  w w .j ava  2  s . c  om
        bSeries.getData().add(new XYChart.Data(i, bValue, diff));
        bValue = bValue + 10 * diff - 5;
        diff = Math.random();
    }
    answer.addAll(aSeries, bSeries);
    return answer;
}

From source file:bq.tutorial.netflix.hystrix.DynamicTest.java

@Test(invocationCount = 2000, threadPoolSize = 20)
public void testStatusRejected() {
    String commandName = "name" + (int) (Math.random() * 100);
    float failPercent = (float) Math.random();
    float timeoutPercent = (float) Math.random();
    int percentToBreakCircuit = (int) (Math.random() * 50 + 50);

    String queryString = "?name=" + commandName + "&failPercent=" + failPercent + "&timeoutPercent="
            + timeoutPercent + "&percentToBreakCircuit=" + percentToBreakCircuit;

    RestTemplate client = new RestTemplate();
    String result = client.getForObject("http://localhost:8080/netflix_hystrix/mvc/dynamic" + queryString,
            String.class);
    System.out.println(result);//  w w  w.j  a va  2  s.c  om
}