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.cds.pcrj.consultaMoeda.MyTransformer.java

public String transform() {
    // lets 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);//from  w  ww  .j  a  v a  2s .c o m
    }
    return buffer.toString();
}

From source file:dtu.ds.warnme.utils.RandomUtils.java

public static float randomFloat(float min, float max) {
    Float f = (float) (min + Math.random() * (max - min + 1));
    return Float.valueOf(new DecimalFormat("#.##").format(f));
}

From source file:com.apress.prospringintegration.corespring.aop.RandomItemGenerator.java

public Item getRandomItem() {
    Item item = new Item();
    item.setCost((float) Math.random() * 250);
    item.setDescription("random item");

    int inum = (int) Math.round(Math.random() * (itemNames.length - 1));
    item.setId(inum);/*from   w w w  . j  a va2s . c o  m*/
    item.setName(itemNames[inum]);

    return item;
}

From source file:edu.uci.ics.jung.algorithms.generators.random.MixedRandomGraphGenerator.java

/**
 * Returns a random mixed-mode graph.  Starts with a randomly generated 
 * Barabasi-Albert (preferential attachment) generator 
 * (4 initial vertices, 3 edges added at each step, and num_vertices - 4 evolution steps).
 * Then takes the resultant graph, replaces random undirected edges with directed
 * edges, and assigns random weights to each edge.
 */// w w w  .  ja va2s  .co m
public static <V, E> Graph<V, E> generateMixedRandomGraph(Factory<Graph<V, E>> graphFactory,
        Factory<V> vertexFactory, Factory<E> edgeFactory, Map<E, Number> edge_weights, int num_vertices,
        boolean parallel, Set<V> seedVertices) {
    int seed = (int) (Math.random() * 10000);
    BarabasiAlbertGenerator<V, E> bag = new BarabasiAlbertGenerator<V, E>(graphFactory, vertexFactory,
            edgeFactory, 4, 3, //false, parallel, 
            seed, seedVertices);
    bag.evolveGraph(num_vertices - 4);
    Graph<V, E> ug = bag.create();

    // create a SparseMultigraph version of g
    Graph<V, E> g = graphFactory.create();
    //new SparseMultigraph<V, E>();
    for (V v : ug.getVertices()) {
        g.addVertex(v);
    }

    // randomly replace some of the edges by directed edges to 
    // get a mixed-mode graph, add random weights

    for (E e : ug.getEdges()) {
        V v1 = ug.getEndpoints(e).getFirst();
        V v2 = ug.getEndpoints(e).getSecond();

        E me = edgeFactory.create();
        g.addEdge(me, v1, v2, Math.random() < .5 ? EdgeType.DIRECTED : EdgeType.UNDIRECTED);
        edge_weights.put(me, Math.random());
    }

    return g;
}

From source file:com.apress.prospringintegration.corespring.aop.PurchaseOrderProcessorImpl.java

public Receipt processPurchaseOrder(PurchaseOrder order) {
    order.setProcessedTime(Calendar.getInstance().getTime());
    Receipt receipt = new Receipt();
    receipt.setPurchaseAmt(order.getItemCost());
    receipt.setAuthcode(Math.round(Math.random() * 2000000));

    return receipt;
}

From source file:Main.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 source file:com.cssweb.android.connect.ConnPool.java

public static JSONObject servicePasswordLogin(String custno, String password) {
    StringBuffer sb = new StringBuffer();
    sb.append("https://jy.njzq.cn/service/login/Login/mobileClientServLogin.do");
    sb.append("?clientNo=");
    sb.append(custno);/*  ww w.j  ava2 s  . c  o  m*/
    sb.append("&password=");
    sb.append(password);
    sb.append("&ram=");
    sb.append(Math.random());
    Log.i("?>>>>>url>>>>>>>", sb.toString());
    return Conn.execute(sb.toString());
}

From source file:com.uber.stream.kafka.mirrormaker.controller.utils.KafkaStarterUtils.java

public static KafkaServerStartable startServer(final int port, final int brokerId, final String zkStr,
        final Properties configuration) {
    // Create the ZK nodes for Kafka, if needed
    int indexOfFirstSlash = zkStr.indexOf('/');
    if (indexOfFirstSlash != -1) {
        String bareZkUrl = zkStr.substring(0, indexOfFirstSlash);
        String zkNodePath = zkStr.substring(indexOfFirstSlash);
        ZkClient client = new ZkClient(bareZkUrl);
        client.createPersistent(zkNodePath, true);
        client.close();/*  www  .  ja  v a 2s . c o  m*/
    }

    File logDir = new File("/tmp/kafka-" + Double.toHexString(Math.random()));
    logDir.mkdirs();

    configureKafkaPort(configuration, port);
    configureZkConnectionString(configuration, zkStr);
    configureBrokerId(configuration, brokerId);
    configureKafkaLogDirectory(configuration, logDir);
    KafkaConfig config = new KafkaConfig(configuration);

    KafkaServerStartable serverStartable = new KafkaServerStartable(config);
    serverStartable.startup();

    return serverStartable;
}

From source file:Main.java

private void loadArray() {
    for (int i = 0; i < numbers.length; i++) {
        numbers[i] = min + (int) (Math.random() * ((max - min) + 1));
    }/*from   w  w w  .  java2 s .com*/
}

From source file:Clipping.java

public void actionPerformed(ActionEvent e) {
    int w = 400;/*w ww.  ja  va 2  s. co  m*/
    int h = 400;

    if (x < 0) {
        delta[0] = Math.random() % 4 + 5;
    } else if (x > w - radius) {
        delta[0] = -(Math.random() % 4 + 5);
    }

    if (y < 0) {
        delta[1] = Math.random() % 4 + 5;
    } else if (y > h - radius) {
        delta[1] = -(Math.random() % 4 + 5);
    }

    x += delta[0];
    y += delta[1];

    repaint();
}