Example usage for java.util Arrays fill

Introduction

In this page you can find the example usage for java.util Arrays fill.

Prototype

public static void fill(Object[] a, Object val)

Source Link

Document

Assigns the specified Object reference to each element of the specified array of Objects.

Usage

From source file:com.laxser.blitz.web.impl.mapping.EngineGroupImpl.java

/**
 * @param simpleName ????/*from  w w  w  .  j  av a  2s .c  om*/
 */
public EngineGroupImpl() {
    LinkedEngine[][] engines = new LinkedEngine[ARRAY_SIZE][];
    Arrays.fill(engines, emptyEngines);
    this.engines = engines;
}

From source file:com.joptimizer.optimizers.PrimalDualMethodHeavyTest.java

/**
 * Quadratic objective with linear eq and ineq.
 *///from   w  w  w  .  j  a va2 s .c om
public void testOptimize() throws Exception {
    log.debug("testOptimize");

    // Objective function
    DoubleMatrix2D P = Utils.randomValuesPositiveMatrix(dim, dim, -0.5, 0.5, seed);
    DoubleMatrix1D q = Utils.randomValuesMatrix(1, dim, -0.5, 0.5, seed).viewRow(0);

    PDQuadraticMultivariateRealFunction objectiveFunction = new PDQuadraticMultivariateRealFunction(P.toArray(),
            q.toArray(), 0);

    // equalities
    double[][] AEMatrix = new double[1][dim];
    Arrays.fill(AEMatrix[0], 1.);
    double[] BEVector = new double[] { 1 };

    // inequalities
    double[][] AIMatrix = new double[dim][dim];
    for (int i = 0; i < dim; i++) {
        AIMatrix[i][i] = -1;
    }
    ConvexMultivariateRealFunction[] inequalities = new ConvexMultivariateRealFunction[dim];
    for (int i = 0; i < dim; i++) {
        inequalities[i] = new LinearMultivariateRealFunction(AIMatrix[i], 0);
    }

    OptimizationRequest or = new OptimizationRequest();
    or.setF0(objectiveFunction);
    double[] ip = new double[dim];
    Arrays.fill(ip, 1. / dim);
    or.setInitialPoint(ip);
    or.setA(AEMatrix);
    or.setB(BEVector);
    or.setFi(inequalities);

    // optimization
    PrimalDualMethod opt = new PrimalDualMethod();
    opt.setOptimizationRequest(or);
    int returnCode = opt.optimize();

    if (returnCode == OptimizationResponse.FAILED) {
        fail();
    }

    OptimizationResponse response = opt.getOptimizationResponse();
    double[] sol = response.getSolution();
    double value = objectiveFunction.value(sol);
    log.debug("sol   : " + ArrayUtils.toString(sol));
    log.debug("value : " + value);
}

From source file:Main.java

public static byte[] padLeft(byte[] tgt, int len, byte padding) {
    if (tgt.length >= len) {
        return tgt;
    }/*from   w  ww.j a  va 2 s. c  o  m*/
    ByteBuffer buffer = ByteBuffer.allocate(len);
    byte[] paddings = new byte[len - tgt.length];
    Arrays.fill(paddings, padding);

    buffer.put(paddings);
    buffer.put(tgt);

    return buffer.array();
}

From source file:net.arp7.HdfsPerfTest.WriteFile.java

private static void writeFiles(final Configuration conf, final FileIoStats stats)
        throws InterruptedException, IOException {
    final FileSystem fs = FileSystem.get(conf);
    final AtomicLong filesLeft = new AtomicLong(params.getNumFiles());
    final long runId = abs(rand.nextLong());
    final byte[] data = new byte[params.getIoSize()];
    Arrays.fill(data, (byte) 65);

    // Start the writers.
    final ExecutorService executor = Executors.newFixedThreadPool((int) params.getNumThreads());
    final CompletionService<Object> ecs = new ExecutorCompletionService<>(executor);
    LOG.info("NumFiles=" + params.getNumFiles() + ", FileSize="
            + FileUtils.byteCountToDisplaySize(params.getFileSize()) + ", IoSize="
            + FileUtils.byteCountToDisplaySize(params.getIoSize()) + ", BlockSize="
            + FileUtils.byteCountToDisplaySize(params.getBlockSize()) + ", ReplicationFactor="
            + params.getReplication() + ", isThrottled=" + (params.maxWriteBps() > 0));
    LOG.info("Starting " + params.getNumThreads() + " writer thread" + (params.getNumThreads() > 1 ? "s" : "")
            + ".");
    final long startTime = System.nanoTime();
    for (long t = 0; t < params.getNumThreads(); ++t) {
        final long threadIndex = t;
        Callable<Object> c = new Callable<Object>() {
            @Override//  w  w  w.j  a v  a2 s .  co  m
            public Object call() throws Exception {
                long fileIndex = 0;
                while (filesLeft.addAndGet(-1) >= 0) {
                    final String fileName = "WriteFile-" + runId + "-" + (threadIndex + 1) + "-"
                            + (++fileIndex);
                    writeOneFile(new Path(params.getOutputDir(), fileName), fs, data, stats);
                }
                return null;
            }
        };
        ecs.submit(c);
    }

    // And wait for all writers to complete.
    for (long t = 0; t < params.getNumThreads(); ++t) {
        ecs.take();
    }
    final long endTime = System.nanoTime();
    stats.setElapsedTime(endTime - startTime);
    executor.shutdown();
}

From source file:CipherSocket.java

public InputStream getInputStream() throws IOException {
    InputStream is = delegate == null ? super.getInputStream() : delegate.getInputStream();
    Cipher cipher = null;// w w  w  .  j  a v  a2  s  .  c om
    try {
        cipher = Cipher.getInstance(algorithm);
        int size = cipher.getBlockSize();
        byte[] tmp = new byte[size];
        Arrays.fill(tmp, (byte) 15);
        IvParameterSpec iv = new IvParameterSpec(tmp);
        cipher.init(Cipher.DECRYPT_MODE, key, iv);
    } catch (Exception e) {
        e.printStackTrace();
        throw new IOException("Failed to init cipher: " + e.getMessage());
    }
    CipherInputStream cis = new CipherInputStream(is, cipher);
    return cis;
}

From source file:com.l2jfree.gameserver.instancemanager.ZoneManager.java

public void reload() {
    // Get the world regions
    L2WorldRegion[][] worldRegions = L2World.getInstance().getAllWorldRegions();
    for (L2WorldRegion[] finalWorldRegion : worldRegions) {
        for (L2WorldRegion finalElement : finalWorldRegion) {
            finalElement.clearZones();//from ww w. j  a  v a 2s.  c o  m
        }
    }
    // Remove registered siege danger zones
    for (Castle c : CastleManager.getInstance().getCastles().values())
        c.getSiege().onZoneReload();

    Arrays.fill(_zones, null);

    // Remove registered unique zones
    _uniqueZones.clear();

    // Load the zones
    load();
}

From source file:io.alicorn.server.http.LoginEndpoint.java

public static String hash(char[] chars) {
    //Parse chars into bytes for hashing.
    CharBuffer charBuffer = CharBuffer.wrap(chars);
    ByteBuffer byteBuffer = charset.encode(charBuffer);
    byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit());

    //Clear temporary arrays of any data.
    Arrays.fill(charBuffer.array(), '\u0000');
    Arrays.fill(byteBuffer.array(), (byte) 0);

    //Generate the SHA-256 hash.
    String hash = hash(bytes);/*from   w ww . java2 s  . c  om*/

    //Clear remaining arrays of any data.
    Arrays.fill(bytes, (byte) 0);

    return hash;
}

From source file:com.gc.iotools.stream.writer.TeeWriter.java

/**
 * <p>/*w ww.ja  v a 2  s . c o m*/
 * Creates a <code>TeeWriter</code> and saves its arguments, the
 * <code>destinations</code> for later use.
 * </p>
 * <p>
 * This constructor allow to specify multiple <code>Writer</code> to which
 * the data will be copied.
 * </p>
 *
 * @since 1.2.4
 * @param destinations
 *            Data written to this<code>Writer</code> are copied to all
 *            the <code>destinations</code>.
 */
public TeeWriter(final Writer... destinations) {
    checkDestinations(destinations);
    this.writeTime = new long[destinations.length];
    this.destinations = destinations;
    this.copyEnabled = new boolean[destinations.length];
    Arrays.fill(this.copyEnabled, true);
}

From source file:hivemall.io.DenseModel.java

public DenseModel(int ndims, boolean withCovar) {
    super();/*from  www.j a  v a2  s  .  com*/
    int size = ndims + 1;
    this.size = size;
    this.weights = new float[size];
    if (withCovar) {
        float[] covars = new float[size];
        Arrays.fill(covars, 1f);
        this.covars = covars;
    } else {
        this.covars = null;
    }
    this.sum_of_squared_gradients = null;
    this.sum_of_squared_delta_x = null;
    this.sum_of_gradients = null;
    this.clocks = null;
    this.deltaUpdates = null;
}

From source file:com.chinamobile.bcbsp.ml.math.DenseDoubleVector.java

/**
 * Creates a new vector with the given length and default value.
 *//*  ww w .  j  a  v  a2s.  co  m*/
public DenseDoubleVector(int length, double val) {
    this(length);
    Arrays.fill(vector, val);
}