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 void getTop(ArrayList<Double> array, ArrayList<Integer> rankList, int i) {
    int index = 0;
    HashSet<Integer> scanned = new HashSet<Integer>();
    Double max = Double.MIN_VALUE;
    for (int m = 0; m < i && m < array.size(); m++) {
        max = Double.MIN_VALUE;/*from  w ww .j  ava  2s  . co  m*/
        for (int no = 0; no < array.size(); no++) {
            if (!scanned.contains(no)) {
                if (array.get(no) > max) {
                    index = no;
                    max = array.get(no);
                } else if (array.get(no).equals(max) && Math.random() > 0.5) {
                    index = no;
                    max = array.get(no);
                }
            }
        }
        if (!scanned.contains(index)) {
            scanned.add(index);
            rankList.add(index);
        }
        //System.out.println(m + "\t" + index);
    }
}

From source file:org.jfree.chart.demo.DeviationRendererDemo3.java

private static XYDataset createDataset() {
    YIntervalSeries series1 = new YIntervalSeries("Band A");
    YIntervalSeries series2 = new YIntervalSeries("Band B");
    YIntervalSeries series3 = new YIntervalSeries("Band C");
    Object obj = new Quarter(1, 2005);
    double d = 0.0D;
    for (int i = 0; i <= 12; i++) {
        d += (Math.random() - 0.5D) * 15D;
        series1.add(((RegularTimePeriod) (obj)).getMiddleMillisecond(), d, d + 10D, Math.max(50D, d + 30D));
        series2.add(((RegularTimePeriod) (obj)).getMiddleMillisecond(), d, d - 10D, d + 10D);
        series3.add(((RegularTimePeriod) (obj)).getMiddleMillisecond(), d, Math.min(-50D, d - 30D), d - 10D);
        obj = ((RegularTimePeriod) (obj)).next();
    }//  w w w .ja  v  a2s.co  m

    YIntervalSeriesCollection dataset = new YIntervalSeriesCollection();
    dataset.addSeries(series1);
    dataset.addSeries(series2);
    dataset.addSeries(series3);
    return dataset;
}

From source file:FlagComm.java

public void run() {
    for (int i = 0; i < 5; i++) {
        while (isValid) {
            Thread.yield();/*ww  w .  j ava  2 s.c  om*/
        }
        theValue = (int) (Math.random() * 256);
        System.out.println("sending " + theValue);
        isValid = true;
    }
}

From source file:com.weib.concert.CDPlayer.java

public void playShuffle() {
    this.cd.pull();
    for (int i = 0; i < 20; i++) {
        int index = (int) Math.floor(Math.random() * (double) this.cd.getTrackNumber());
        this.cd.play(index);
    }// w  w w  . ja v  a2  s.co  m
    this.cd.push();
}

From source file:de.blizzy.documentr.TestUtil.java

public static Page createRandomPage(String parentPagePath) {
    Page page = Page.fromText(String.valueOf(Math.random() * Long.MAX_VALUE),
            String.valueOf(Math.random() * Long.MAX_VALUE));
    TestPageUtil.setParentPagePath(page, parentPagePath);
    return page;/*from   w w  w .j a  v  a2  s. c om*/
}

From source file:Main.java

/** Returns a random number from the specified range 
 * @param min the smallest value that should occur when randomly generating numbers 
 * @param max the largest value that should occur when randomly generating numbers 
 * @return a random number between min and max. If min is larger than max, an exception will be thrown! */
public static int randomNumberBetweenIntervals(int min, int max) {
    if (min >= max) {
        throw new IllegalArgumentException("The minimum bound cannot be larger or equal to the maximum bound!");
    }/*from  ww  w  .  j a v  a  2 s .  co  m*/

    return min + (int) (Math.random() * ((max - min) + 1));
}

From source file:org.jfree.chart.demo.BoxAndWhiskerChartDemo1.java

@SuppressWarnings("rawtypes")
private static List 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));
    }//from   ww w .  j a  va  2 s.  c om

    return arraylist;
}

From source file:Pipe.java

public void run() {
    byte value;/*from w  ww.ja  v a  2  s.  com*/

    try {
        for (int i = 0; i < 5; i++) {
            value = (byte) (Math.random() * 256);
            System.out.print("About to send " + value + ".. ");
            out.write(value);
            System.out.println("..sent..");
            Thread.sleep((long) (Math.random() * 1000));
        }
        out.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Hypnosis1.java

public Hypnosis1(int numberOfSegments) {
    int numberOfCoordinates = numberOfSegments * 4 + 2;
    coordinates = new int[numberOfCoordinates];
    deltas = new int[numberOfCoordinates];
    for (int i = 0; i < numberOfCoordinates; i++) {
        coordinates[i] = (int) (Math.random() * 300);
        deltas[i] = (int) (Math.random() * 4 + 3);
        if (deltas[i] > 4)
            deltas[i] = -(deltas[i] - 3);
    }/*from  w ww .j a  v  a2s  .  c o  m*/
    paint = new GradientPaint(0, 0, Color.blue, 20, 10, Color.red, true);

    Thread t = new Thread(this);
    t.start();
}

From source file:org.jfree.chart.demo.YIntervalChartDemo1.java

private static IntervalXYDataset createDataset() {
    double d = 100D;
    YIntervalSeries yintervalseries = new YIntervalSeries("Series 1");
    for (int i = 0; i < 100; i++) {
        d += Math.random() - 0.48999999999999999D;
        yintervalseries.add(i, d, d - 3D, d + 3D);
    }/* w w  w  . ja v  a 2  s . c o  m*/

    YIntervalSeriesCollection yintervalseriescollection = new YIntervalSeriesCollection();
    yintervalseriescollection.addSeries(yintervalseries);
    return yintervalseriescollection;
}