Example usage for java.io DataOutputStream DataOutputStream

List of usage examples for java.io DataOutputStream DataOutputStream

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Introduction

In this page you can find the example usage for java.io DataOutputStream DataOutputStream.

Prototype

public DataOutputStream(OutputStream out)

Source Link

Document

Creates a new data output stream to write data to the specified underlying output stream.

Usage

From source file:cacheservice.CacheServer.java

/**
 * @param args the command line arguments
 *//*from www  . j a  va  2  s  .  c  o m*/
public static void main(String[] args) {
    // COMUNICACIN CON EL CLIENTE
    ServerSocket serverSocket;
    Socket socketCliente;
    DataInputStream in; //Flujo de datos de entrada
    DataOutputStream out; //Flujo de datos de salida
    String mensaje;
    int laTengoenCache = 0;

    //COMUNICACIN CON EL INDEX
    ServerSocket serverSocketIndex;
    Socket socketIndex;
    DataOutputStream outIndex;
    ObjectInputStream inIndex;
    String mensajeIndex;

    try {
        serverSocket = new ServerSocket(4444);
        System.out.print("SERVIDOR CACHE ACTIVO a la espera de peticiones");

        //MIENTRAS PERMANEZCA ACTIVO EL SERVIDOR CACHE ESPERAR? POR PETICIONES DE LOS CLIENTES
        while (true) {
            socketCliente = serverSocket.accept();
            in = new DataInputStream(socketCliente.getInputStream()); //Entrada de los mensajes del cliente
            mensaje = in.readUTF(); //Leo el mensaje enviado por el cliente

            System.out.println("\nHe recibido del cliente: " + mensaje); //Muestro el mensaje recibido por el cliente
            //int particionBuscada = seleccionarParticion(mensaje, tamanoCache, numeroParticiones); //Busco la particin
            //double tamanoParticion = Math.ceil( (double)tamanoCache / (double)numeroParticiones);

            //Thread hilo = new Hilo(mensaje,particionBuscada,cache.GetTable(),(int) tamanoParticion);
            //hilo.start();

            //RESPUESTA DEL SERVIDOR CACHE AL CLIENTE
            out = new DataOutputStream(socketCliente.getOutputStream());
            String respuesta = "Respuesta para " + mensaje;
            if (laTengoenCache == 1) {
                out.writeUTF(respuesta);
                System.out.println("\nTengo la respuesta. He respondido al cliente: " + respuesta);
            } else {
                out.writeUTF("miss");
                out.close();
                in.close();
                socketCliente.close();

                System.out.println("\nNo tengo la respuesta.");

                //LEER RESPUESTA DEL SERVIDOR INDEX
                serverSocketIndex = new ServerSocket(6666);
                socketIndex = serverSocketIndex.accept();
                inIndex = new ObjectInputStream(socketIndex.getInputStream());
                JSONObject mensajeRecibidoIndex = (JSONObject) inIndex.readObject();

                System.out.println("He recibido del SERVIDOR INDEX: " + mensajeRecibidoIndex);

                //outIndex.close();
                inIndex.close();
                socketIndex.close();

            }

        }
    } catch (Exception e) {
        System.out.print(e.getMessage());
    }
}

From source file:DataIODemo.java

public static void main(String[] args) throws IOException {

    // write the data out
    DataOutputStream out = new DataOutputStream(new FileOutputStream("invoice1.txt"));

    double[] prices = { 19.99, 9.99, 15.99, 3.99, 4.99 };
    int[] units = { 12, 8, 13, 29, 50 };
    String[] descs = { "Java T-shirt", "Java Mug", "Duke Juggling Dolls", "Java Pin", "Java Key Chain" };

    for (int i = 0; i < prices.length; i++) {
        out.writeDouble(prices[i]);/*ww w. j  a  v a  2  s.  co  m*/
        out.writeChar('\t');
        out.writeInt(units[i]);
        out.writeChar('\t');
        out.writeChars(descs[i]);
        out.writeChar('\n');
    }
    out.close();

    // read it in again
    DataInputStream in = new DataInputStream(new FileInputStream("invoice1.txt"));

    double price;
    int unit;
    StringBuffer desc;
    double total = 0.0;

    try {
        while (true) {
            price = in.readDouble();
            in.readChar(); // throws out the tab
            unit = in.readInt();
            in.readChar(); // throws out the tab
            char chr;
            desc = new StringBuffer(20);
            char lineSep = System.getProperty("line.separator").charAt(0);
            while ((chr = in.readChar()) != lineSep)
                desc.append(chr);
            System.out.println("You've ordered " + unit + " units of " + desc + " at $" + price);
            total = total + unit * price;
        }
    } catch (EOFException e) {
    }
    System.out.println("For a TOTAL of: $" + total);
    in.close();
}

From source file:Naive.java

public static void main(String[] args) throws Exception {
    // Basic access authentication setup
    String key = "CHANGEME: YOUR_API_KEY";
    String secret = "CHANGEME: YOUR_API_SECRET";
    String version = "preview1"; // CHANGEME: the API version to use
    String practiceid = "000000"; // CHANGEME: the practice ID to use

    // Find the authentication path
    Map<String, String> auth_prefix = new HashMap<String, String>();
    auth_prefix.put("v1", "oauth");
    auth_prefix.put("preview1", "oauthpreview");
    auth_prefix.put("openpreview1", "oauthopenpreview");

    URL authurl = new URL("https://api.athenahealth.com/" + auth_prefix.get(version) + "/token");

    HttpURLConnection conn = (HttpURLConnection) authurl.openConnection();
    conn.setRequestMethod("POST");

    // Set the Authorization request header
    String auth = Base64.encodeBase64String((key + ':' + secret).getBytes());
    conn.setRequestProperty("Authorization", "Basic " + auth);

    // Since this is a POST, the parameters go in the body
    conn.setDoOutput(true);//from   ww  w . j av  a2 s . co  m
    String contents = "grant_type=client_credentials";
    DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
    wr.writeBytes(contents);
    wr.flush();
    wr.close();

    // Read the response
    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    StringBuilder sb = new StringBuilder();
    String line;
    while ((line = rd.readLine()) != null) {
        sb.append(line);
    }
    rd.close();

    // Decode from JSON and save the token for later
    String response = sb.toString();
    JSONObject authorization = new JSONObject(response);
    String token = authorization.get("access_token").toString();

    // GET /departments
    HashMap<String, String> params = new HashMap<String, String>();
    params.put("limit", "1");

    // Set up the URL, method, and Authorization header
    URL url = new URL("https://api.athenahealth.com/" + version + "/" + practiceid + "/departments" + "?"
            + urlencode(params));
    conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("GET");
    conn.setRequestProperty("Authorization", "Bearer " + token);

    rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    sb = new StringBuilder();
    while ((line = rd.readLine()) != null) {
        sb.append(line);
    }
    rd.close();

    response = sb.toString();
    JSONObject departments = new JSONObject(response);
    System.out.println(departments.toString());

    // POST /appointments/{appointmentid}/notes
    params = new HashMap<String, String>();
    params.put("notetext", "Hello from Java!");

    url = new URL("https://api.athenahealth.com/" + version + "/" + practiceid + "/appointments/1/notes");
    conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Authorization", "Bearer " + token);

    // POST parameters go in the body
    conn.setDoOutput(true);
    contents = urlencode(params);
    wr = new DataOutputStream(conn.getOutputStream());
    wr.writeBytes(contents);
    wr.flush();
    wr.close();

    rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    sb = new StringBuilder();
    while ((line = rd.readLine()) != null) {
        sb.append(line);
    }
    rd.close();

    response = sb.toString();
    JSONObject note = new JSONObject(response);
    System.out.println(note.toString());
}

From source file:org.wso2.charon3.samples.group.sample01.CreateGroupSample.java

public static void main(String[] args) {
    try {/*from   w w  w.  j av  a  2s  . c  om*/
        String url = "http://localhost:8080/scim/v2/Groups";
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        // Setting basic post request
        con.setRequestMethod("POST");
        con.setRequestProperty("Content-Type", "application/scim+json");

        // Send post request
        con.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(createRequestBody);
        wr.flush();
        wr.close();

        int responseCode = con.getResponseCode();

        BufferedReader in;
        if (responseCode == HttpURLConnection.HTTP_CREATED) { // success
            in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        } else {
            in = new BufferedReader(new InputStreamReader(con.getErrorStream()));
        }
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        //printing result from response
        System.out.println("Response Code : " + responseCode);
        System.out.println("Response Message : " + con.getResponseMessage());
        System.out.println("Response Content : " + response.toString());

    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:SecurityManagerTest.java

public static void main(String[] args) throws Exception {
    try {/*from w  w  w  .  j  a va 2  s .  c o m*/
        System.setSecurityManager(new PasswordSecurityManager("Booga Booga"));
    } catch (SecurityException se) {
        System.err.println("SecurityManager already set!");
    }

    DataInputStream in = new DataInputStream(new FileInputStream("inputtext.txt"));
    DataOutputStream out = new DataOutputStream(new FileOutputStream("outputtext.txt"));
    String inputString;
    while ((inputString = in.readLine()) != null) {
        out.writeBytes(inputString);
        out.writeByte('\n');
    }
    in.close();
    out.close();
}

From source file:Ch7_Images.java

public static void main(String[] args) {
    int numRows = 6, numCols = 11, pix = 20;
    PaletteData pd = new PaletteData(
            new RGB[] { new RGB(0x00, 0x00, 0x00), new RGB(0x80, 0x80, 0x80), new RGB(0xFF, 0xFF, 0xFF) });

    ImageData[] flagArray = new ImageData[3];
    for (int frame = 0; frame < flagArray.length; frame++) {
        flagArray[frame] = new ImageData(pix * numCols, pix * numRows, 4, pd);
        flagArray[frame].delayTime = 10;
        for (int x = 0; x < pix * numCols; x++) {
            for (int y = 0; y < pix * numRows; y++) {
                int value = (((x / pix) % 3) + (3 - ((y / pix) % 3)) + frame) % 3;
                flagArray[frame].setPixel(x, y, value);
            }//  w  ww .  j ava  2  s .c o m
        }
    }

    ImageLoader gifloader = new ImageLoader();
    ByteArrayOutputStream flagByte[] = new ByteArrayOutputStream[3];
    byte[][] gifarray = new byte[3][];
    gifloader.data = flagArray;

    for (int i = 0; i < 3; i++) {
        flagByte[i] = new ByteArrayOutputStream();
        flagArray[0] = flagArray[i];
        gifloader.save(flagByte[i], SWT.IMAGE_GIF);
        gifarray[i] = flagByte[i].toByteArray();
    }

    byte[] gif = new byte[4628];
    System.arraycopy(gifarray[0], 0, gif, 0, 61);
    System.arraycopy(new byte[] { 33, (byte) 255, 11 }, 0, gif, 61, 3);
    System.arraycopy("NETSCAPE2.0".getBytes(), 0, gif, 64, 11);
    System.arraycopy(new byte[] { 3, 1, -24, 3, 0, 33, -7, 4, -24 }, 0, gif, 75, 9);
    System.arraycopy(gifarray[0], 65, gif, 84, 1512);

    for (int i = 1; i < 3; i++) {
        System.arraycopy(gifarray[i], 61, gif, 1516 * i + 80, 3);
        gif[1516 * i + 83] = (byte) -24;
        System.arraycopy(gifarray[i], 65, gif, 1516 * i + 84, 1512);
    }

    try {
        DataOutputStream in = new DataOutputStream(
                new BufferedOutputStream(new FileOutputStream(new File("FlagGIF.gif"))));
        in.write(gif, 0, gif.length);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:com.tc.simple.apn.quicktests.Test.java

/**
 * @param args/* ww w  .  j a v a 2 s  .  co  m*/
 */

public static void main(String[] args) {
    SSLSocket socket = null;

    try {
        String host = "gateway.sandbox.push.apple.com";
        int port = 2195;

        String token = "de7f197546e41a76684f8e2d89f397ed165298d7772f4bd9b0f39c674b185b0f";
        System.out.println(token.toCharArray().length);

        //String token = "8cebc7c08f79fa62f0994eb4298387ff930857ff8d14a50de431559cf476b223";

        KeyStore keyStore = KeyStore.getInstance("PKCS12");

        keyStore.load(Test.class.getResourceAsStream("egram-dev-apn.p12"), "xxxxxxxxx".toCharArray());
        KeyManagerFactory keyMgrFactory = KeyManagerFactory
                .getInstance(KeyManagerFactory.getDefaultAlgorithm());
        keyMgrFactory.init(keyStore, "xxxxxxxxx".toCharArray());

        SSLContext sslContext = SSLContext.getInstance("TLS");
        sslContext.init(keyMgrFactory.getKeyManagers(), null, null);
        SSLSocketFactory socketFactory = sslContext.getSocketFactory();

        socket = (SSLSocket) socketFactory.createSocket(host, port);
        String[] cipherSuites = socket.getSupportedCipherSuites();
        socket.setEnabledCipherSuites(cipherSuites);
        socket.startHandshake();

        char[] t = token.toCharArray();
        byte[] b = Hex.decodeHex(t);

        OutputStream outputstream = socket.getOutputStream();

        String payload = "{\"aps\":{\"alert\":\"yabadabadooo\"}}";

        int expiry = (int) ((System.currentTimeMillis() / 1000L) + 7200);

        ByteArrayOutputStream bout = new ByteArrayOutputStream();

        DataOutputStream dos = new DataOutputStream(bout);

        //command
        dos.writeByte(1);

        //id
        dos.writeInt(900);

        //expiry
        dos.writeInt(expiry);

        //token length.
        dos.writeShort(b.length);

        //token
        dos.write(b);

        //payload length
        dos.writeShort(payload.length());

        //payload.
        dos.write(payload.getBytes());

        byte[] byteMe = bout.toByteArray();

        socket.getOutputStream().write(byteMe);

        socket.setSoTimeout(900);
        InputStream in = socket.getInputStream();

        System.out.println(APNErrors.getError(in.read()));

        in.close();

        outputstream.close();

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            socket.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}

From source file:RSATest.java

public static void main(String[] args) {
    try {//from  w  ww . jav  a 2 s  .  co  m
        if (args[0].equals("-genkey")) {
            KeyPairGenerator pairgen = KeyPairGenerator.getInstance("RSA");
            SecureRandom random = new SecureRandom();
            pairgen.initialize(KEYSIZE, random);
            KeyPair keyPair = pairgen.generateKeyPair();
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
            out.writeObject(keyPair.getPublic());
            out.close();
            out = new ObjectOutputStream(new FileOutputStream(args[2]));
            out.writeObject(keyPair.getPrivate());
            out.close();
        } else if (args[0].equals("-encrypt")) {
            KeyGenerator keygen = KeyGenerator.getInstance("AES");
            SecureRandom random = new SecureRandom();
            keygen.init(random);
            SecretKey key = keygen.generateKey();

            // wrap with RSA public key
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            Key publicKey = (Key) keyIn.readObject();
            keyIn.close();

            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.WRAP_MODE, publicKey);
            byte[] wrappedKey = cipher.wrap(key);
            DataOutputStream out = new DataOutputStream(new FileOutputStream(args[2]));
            out.writeInt(wrappedKey.length);
            out.write(wrappedKey);

            InputStream in = new FileInputStream(args[1]);
            cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            crypt(in, out, cipher);
            in.close();
            out.close();
        } else {
            DataInputStream in = new DataInputStream(new FileInputStream(args[1]));
            int length = in.readInt();
            byte[] wrappedKey = new byte[length];
            in.read(wrappedKey, 0, length);

            // unwrap with RSA private key
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            Key privateKey = (Key) keyIn.readObject();
            keyIn.close();

            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.UNWRAP_MODE, privateKey);
            Key key = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);

            OutputStream out = new FileOutputStream(args[2]);
            cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, key);

            crypt(in, out, cipher);
            in.close();
            out.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (GeneralSecurityException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}

From source file:SignatureTest.java

public static void main(String[] args) {
    try {/*from   w  ww  .j  a v  a2 s .  c  om*/
        if (args[0].equals("-genkeypair")) {
            KeyPairGenerator pairgen = KeyPairGenerator.getInstance("DSA");
            SecureRandom random = new SecureRandom();
            pairgen.initialize(KEYSIZE, random);
            KeyPair keyPair = pairgen.generateKeyPair();
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
            out.writeObject(keyPair.getPublic());
            out.close();
            out = new ObjectOutputStream(new FileOutputStream(args[2]));
            out.writeObject(keyPair.getPrivate());
            out.close();
        } else if (args[0].equals("-sign")) {
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            PrivateKey privkey = (PrivateKey) keyIn.readObject();
            keyIn.close();

            Signature signalg = Signature.getInstance("DSA");
            signalg.initSign(privkey);

            File infile = new File(args[1]);
            InputStream in = new FileInputStream(infile);
            int length = (int) infile.length();
            byte[] message = new byte[length];
            in.read(message, 0, length);
            in.close();

            signalg.update(message);
            byte[] signature = signalg.sign();

            DataOutputStream out = new DataOutputStream(new FileOutputStream(args[2]));
            int signlength = signature.length;
            out.writeInt(signlength);
            out.write(signature, 0, signlength);
            out.write(message, 0, length);
            out.close();
        } else if (args[0].equals("-verify")) {
            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[2]));
            PublicKey pubkey = (PublicKey) keyIn.readObject();
            keyIn.close();

            Signature verifyalg = Signature.getInstance("DSA");
            verifyalg.initVerify(pubkey);

            File infile = new File(args[1]);
            DataInputStream in = new DataInputStream(new FileInputStream(infile));
            int signlength = in.readInt();
            byte[] signature = new byte[signlength];
            in.read(signature, 0, signlength);

            int length = (int) infile.length() - signlength - 4;
            byte[] message = new byte[length];
            in.read(message, 0, length);
            in.close();

            verifyalg.update(message);
            if (!verifyalg.verify(signature))
                System.out.print("not ");
            System.out.println("verified");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:com.linkedin.pinot.perf.MultiValueReaderWriterBenchmark.java

public static void main(String[] args) throws Exception {
    List<String> lines = IOUtils.readLines(new FileReader(new File(args[0])));
    int totalDocs = lines.size();
    int max = Integer.MIN_VALUE;
    int maxNumberOfMultiValues = Integer.MIN_VALUE;
    int totalNumValues = 0;
    int data[][] = new int[totalDocs][];
    for (int i = 0; i < lines.size(); i++) {
        String line = lines.get(i);
        String[] split = line.split(",");
        totalNumValues = totalNumValues + split.length;
        if (split.length > maxNumberOfMultiValues) {
            maxNumberOfMultiValues = split.length;
        }// ww  w .  j  a  v  a 2s  .c  o m
        data[i] = new int[split.length];
        for (int j = 0; j < split.length; j++) {
            String token = split[j];
            int val = Integer.parseInt(token);
            data[i][j] = val;
            if (val > max) {
                max = val;
            }
        }
    }
    int maxBitsNeeded = (int) Math.ceil(Math.log(max) / Math.log(2));
    int size = 2048;
    int[] offsets = new int[size];
    int bitMapSize = 0;
    File outputFile = new File("output.mv.fwd");

    FixedBitSkipListSCMVWriter fixedBitSkipListSCMVWriter = new FixedBitSkipListSCMVWriter(outputFile,
            totalDocs, totalNumValues, maxBitsNeeded);

    for (int i = 0; i < totalDocs; i++) {
        fixedBitSkipListSCMVWriter.setIntArray(i, data[i]);
        if (i % size == size - 1) {
            MutableRoaringBitmap rr1 = MutableRoaringBitmap.bitmapOf(offsets);
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            DataOutputStream dos = new DataOutputStream(bos);
            rr1.serialize(dos);
            dos.close();
            //System.out.println("Chunk " + i / size + " bitmap size:" + bos.size());
            bitMapSize += bos.size();
        } else if (i == totalDocs - 1) {
            MutableRoaringBitmap rr1 = MutableRoaringBitmap.bitmapOf(Arrays.copyOf(offsets, i % size));
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            DataOutputStream dos = new DataOutputStream(bos);
            rr1.serialize(dos);
            dos.close();
            //System.out.println("Chunk " + i / size + " bitmap size:" + bos.size());
            bitMapSize += bos.size();
        }
    }
    fixedBitSkipListSCMVWriter.close();
    System.out.println("Output file size:" + outputFile.length());
    System.out.println("totalNumberOfDoc\t\t\t:" + totalDocs);
    System.out.println("totalNumberOfValues\t\t\t:" + totalNumValues);
    System.out.println("chunk size\t\t\t\t:" + size);
    System.out.println("Num chunks\t\t\t\t:" + totalDocs / size);
    int numChunks = totalDocs / size + 1;
    int totalBits = (totalNumValues * maxBitsNeeded);
    int dataSizeinBytes = (totalBits + 7) / 8;

    System.out.println("Raw data size with fixed bit encoding\t:" + dataSizeinBytes);
    System.out.println("\nPer encoding size");
    System.out.println();
    System.out.println("size (offset + length)\t\t\t:" + ((totalDocs * (4 + 4)) + dataSizeinBytes));
    System.out.println();
    System.out.println("size (offset only)\t\t\t:" + ((totalDocs * (4)) + dataSizeinBytes));
    System.out.println();
    System.out.println("bitMapSize\t\t\t\t:" + bitMapSize);
    System.out.println("size (with bitmap)\t\t\t:" + (bitMapSize + (numChunks * 4) + dataSizeinBytes));

    System.out.println();
    System.out.println("Custom Bitset\t\t\t\t:" + (totalNumValues + 7) / 8);
    System.out.println("size (with custom bitset)\t\t\t:"
            + (((totalNumValues + 7) / 8) + (numChunks * 4) + dataSizeinBytes));

}