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:BufferedImageThread.java

public void step(int w, int h) {
    x += xi;/*from  www . jav a2 s  .com*/
    y += yi;

    if (x > w) {
        x = w - 1;
        xi = Math.random() * -w / 32;
    }
    if (x < 0) {
        x = 2;
        xi = Math.random() * w / 32;
    }
    if (y > h) {
        y = h - 2;
        yi = Math.random() * -h / 32;
    }
    if (y < 0) {
        y = 2;
        yi = Math.random() * h / 32;
    }

    if ((rotate += 5) == 360) {
        rotate = 0;
    }
    if (scaleDirection == UP) {
        if ((scale += 0.5) > 1.5) {
            scaleDirection = DOWN;
        }
    } else if (scaleDirection == DOWN) {
        if ((scale -= .05) < 0.5) {
            scaleDirection = UP;
        }
    }
}

---

From source file:com.stableapps.anglewraparounddemo.AngleWrapDemoMain.java

/**
 * Creates a sample dataset.//  w  w w  .ja  v a2 s .c  o  m
 *
 * @param count the item count.
 *
 * @return the dataset.
 */
private XYDataset createAngleDataset(final int count) {
    final TimeSeriesCollection dataset = new TimeSeriesCollection();
    final TimeSeries s1 = new TimeSeries("Angle (In Degrees)");
    RegularTimePeriod start = new Minute();
    double direction = 180.0;
    for (int i = 0; i < count; i++) {
        s1.add(start, direction);
        start = start.next();
        direction = direction + (Math.random() - 0.45) * 15.0;
        if (direction < 0.0) {
            direction = direction + 360.0;
        } else if (direction > 360.0) {
            direction = direction - 360.0;
        }
    }
    dataset.addSeries(s1);
    return dataset;
}

---

From source file:com.netflix.simianarmy.basic.chaos.BasicChaosInstanceSelector.java

private String selectOneInstance(InstanceGroup group, double probability) {
    Validate.isTrue(probability < 1);
    if (probability <= 0) {
        logger().info("Group {} [type {}] has disabled probability: {}",
                new Object[] { group.name(), group.type(), probability });
        return null;
    }/*w w  w. j av  a2s  .  c  om*/
    double rand = Math.random();
    if (rand > probability || group.instances().isEmpty()) {
        logger().info("Group {} [type {}] got lucky: {} > {}",
                new Object[] { group.name(), group.type(), rand, probability });
        return null;
    }
    return group.instances().get(RANDOM.nextInt(group.instances().size()));
}

---

From source file:de.tor.tribes.ui.wiz.dep.DefensePlanerWizard.java

private static List<SOSRequest> createSampleRequests() {
    int wallLevel = 20;
    int supportCount = 100;
    int maxAttackCount = 50;
    int maxFakeCount = 0;

    List<SOSRequest> result = new LinkedList<>();
    Village[] villages = GlobalOptions.getSelectedProfile().getTribe().getVillageList();
    Village[] attackerVillages = DataHolder.getSingleton().getTribeByName("Alexander25").getVillageList();

    for (int i = 0; i < supportCount; i++) {
        int id = (int) Math.rint(Math.random() * (villages.length - 1));
        Village target = villages[id];// w  ww .  j  a  va  2s .  c  o  m
        SOSRequest r = new SOSRequest(target.getTribe());
        r.addTarget(target);
        TargetInformation info = r.getTargetInformation(target);
        info.setWallLevel(wallLevel);

        TroopAmountFixed troops = new TroopAmountFixed();
        troops.setAmountForUnit("spear", (int) Math.rint(Math.random() * 14000));
        troops.setAmountForUnit("sword", (int) Math.rint(Math.random() * 14000));
        troops.setAmountForUnit("heavy", (int) Math.rint(Math.random() * 5000));
        info.setTroops(troops);

        int cnt = (int) Math.rint(maxAttackCount * Math.random());
        for (int j = 0; j < cnt; j++) {
            int idx = (int) Math.rint(Math.random() * (attackerVillages.length - 2));
            Village v = attackerVillages[idx];
            info.addAttack(v, new Date(
                    System.currentTimeMillis() + Math.round(DateUtils.MILLIS_PER_DAY * 7 * Math.random())));
            for (int k = 0; k < (int) Math.rint(maxFakeCount * Math.random()); k++) {
                idx = (int) Math.rint(Math.random() * (attackerVillages.length - 2));
                v = attackerVillages[idx];
                info.addAttack(v, new Date(System.currentTimeMillis() + Math.round(3600 * Math.random())));
            }
        }
        result.add(r);
    }

    return result;
}

---

From source file:com.btobits.automator.ant.utils.task.RandomTask.java

protected int calculateRandom(int minInt, int maxInt) {
    return minInt + (int) (Math.random() * (maxInt - minInt + 1));
}

---

From source file:com.netflix.simianarmy.basic.sniper.BasicSniperInstanceSelector.java

private String selectOneInstance(InstanceGroup group, double probability) {
    Validate.isTrue(probability <= 1.0);
    if (probability <= 0) {
        logger().info("Group {} [type {}] has disabled probability: {}",
                new Object[] { group.name(), group.type(), probability });
        return null;
    }/*from w  w w . ja  va  2 s  . c  o m*/
    double rand = Math.random();
    if (rand > probability || group.instances().isEmpty()) {
        logger().info("Group {} [type {}] got lucky: {} > {}",
                new Object[] { group.name(), group.type(), rand, probability });
        return null;
    }
    return group.instances().get(RANDOM.nextInt(group.instances().size()));
}

---

From source file:org.openbaton.vnfm.dummy.DummyAMQPVNFManager.java

@Override
public VirtualNetworkFunctionRecord scale(Action scaleInOrOut,
        VirtualNetworkFunctionRecord virtualNetworkFunctionRecord, VNFCInstance component, Object scripts,
        VNFRecordDependency dependency) throws Exception {
    Thread.sleep((int) (Math.random() * 500) + 1000);
    return virtualNetworkFunctionRecord;
}

---

From source file:org.openmrs.contrib.metadatarepository.service.MailEngineTest.java

@Test
public void testSendMessageWithAttachment() throws Exception {
    final String ATTACHMENT_NAME = "boring-attachment.txt";

    //mock smtp server
    Wiser wiser = new Wiser();
    int port = 2525 + (int) (Math.random() * 100);
    mailSender.setPort(port);// www.ja v a 2s  .co m
    wiser.setPort(port);
    wiser.start();

    Date dte = new Date();
    String emailSubject = "grepster testSendMessageWithAttachment: " + dte;
    String emailBody = "Body of the grepster testSendMessageWithAttachment message sent at: " + dte;

    ClassPathResource cpResource = new ClassPathResource("/test-attachment.txt");
    // a null from should work
    mailEngine.sendMessage(new String[] { "foo@bar.com" }, null, cpResource, emailBody, emailSubject,
            ATTACHMENT_NAME);

    mailEngine.sendMessage(new String[] { "foo@bar.com" }, mailMessage.getFrom(), cpResource, emailBody,
            emailSubject, ATTACHMENT_NAME);

    wiser.stop();
    // one without and one with from
    assertTrue(wiser.getMessages().size() == 2);

    WiserMessage wm = wiser.getMessages().get(0);
    MimeMessage mm = wm.getMimeMessage();

    Object o = wm.getMimeMessage().getContent();
    assertTrue(o instanceof MimeMultipart);
    MimeMultipart multi = (MimeMultipart) o;
    int numOfParts = multi.getCount();

    boolean hasTheAttachment = false;
    for (int i = 0; i < numOfParts; i++) {
        BodyPart bp = multi.getBodyPart(i);
        String disp = bp.getDisposition();
        if (disp == null) { //the body of the email
            Object innerContent = bp.getContent();
            MimeMultipart innerMulti = (MimeMultipart) innerContent;
            assertEquals(emailBody, innerMulti.getBodyPart(0).getContent());
        } else if (disp.equals(Part.ATTACHMENT)) { //the attachment to the email
            hasTheAttachment = true;
            assertEquals(ATTACHMENT_NAME, bp.getFileName());
        } else {
            fail("Did not expect to be able to get here.");
        }
    }
    assertTrue(hasTheAttachment);
    assertEquals(emailSubject, mm.getSubject());
}

---

From source file:com.shyslav.controller.UploadController.java

@RequestMapping(value = "/uploadAction")
private String uploadAction(ModelMap mv, RedirectAttributes redirectAttributes, HttpSession ses,
        HttpServletRequest request) throws URISyntaxException {
    String name = null;/*from   w  w  w .j  a v  a 2  s  . c  o  m*/
    String genre = null;
    String author = null;
    String smallText = null;
    String fullText = null;
    String vision = null;
    String serverPath = null;
    Properties props = new Properties();
    try (InputStream in = UploadController.class.getResourceAsStream("application.properties")) {
        props.load(in);
    } catch (IOException ex) {
        System.out.println(ex);
    }
    DiskFileItemFactory d = new DiskFileItemFactory();
    ServletFileUpload uploadre = new ServletFileUpload(d);
    System.out.println(props.getProperty("downloadDirectory"));
    try {
        List<FileItem> list = uploadre.parseRequest(request);
        for (FileItem f : list) {
            if (f.isFormField() == false) {
                //write file to upload folder;

                if (!FilenameUtils.getExtension(f.getName()).equals("pdf")) {
                    String ext = FilenameUtils.getExtension(f.getName());
                    System.out.println(ext);
                    System.out.println("comed");
                    redirectAttributes.addFlashAttribute("error",
                            "?   ? , ?  pdf");
                    return "redirect:add.htm";
                }
                serverPath = "/" + author + "_" + name + "_" + genre + "_" + Math.random() * 100 + "."
                        + FilenameUtils.getExtension(f.getName());
                f.write(new File(props.getProperty("downloadDirectory") + serverPath));
                System.out.println(f.getName());
            } else if (f.isFormField()) {
                String fieldname = f.getFieldName();
                if (fieldname.equals("name")) {
                    name = f.getString("UTF-8");
                } else if (fieldname.equals("genre")) {
                    genre = f.getString("UTF-8");
                } else if (fieldname.equals("author")) {
                    author = f.getString("UTF-8");
                } else if (fieldname.equals("smallText")) {
                    smallText = f.getString("UTF-8");
                } else if (fieldname.equals("fullText")) {
                    fullText = f.getString("UTF-8");
                } else if (fieldname.equals("vision")) {
                    vision = f.getString("UTF-8");
                }
                System.out.println(f.getFieldName().toString());
            }
        }
    } catch (Exception ex) {
        System.out.println(ex);
    }
    if (name == null || genre == null || author == null || smallText == null || fullText == null
            || vision == null || smallText.length() < 30 || fullText.length() < 50 || name.length() < 3) {
        redirectAttributes.addFlashAttribute("error",
                "? ? ?  ");
        return "redirect:add.htm";
    }
    try {
        Session session = HibernateUtil.getSessionFactory().openSession();
        session.beginTransaction();
        Query query = session.createSQLQuery("INSERT INTO books\n"
                + "(name, author, genre, small_text, full_text, date_create, vision, server_Path)\n"
                + "VALUES('" + name + "', '" + author + "', " + genre + ", '" + smallText + "', '" + fullText
                + "', NOW(), '" + vision + "','" + serverPath + "')");
        System.out.println(query.toString());
        int result = query.executeUpdate();
        session.getTransaction().commit();
    } catch (Exception ex) {
        System.out.println(ex);
    }
    redirectAttributes.addFlashAttribute("sucses", " ? ");
    return "redirect:index.htm";
}

---

From source file:com.yifanlu.PSXperiaTool.PSXperiaTool.java

private File createTempDir(File dataDir) throws IOException {
    nextStep("Creating temporary directory.");
    File tempDir = new File(new File("."), "/.psxperia." + (int) (Math.random() * 1000));
    if (tempDir.exists())
        FileUtils.deleteDirectory(tempDir);
    if (!tempDir.mkdirs())
        throw new IOException("Cannot create temporary directory!");
    FileUtils.copyDirectory(dataDir, tempDir);
    Logger.debug("Created temporary directory at, %s", tempDir.getPath());
    return tempDir;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »