Example usage for java.io DataOutputStream writeInt

Introduction

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

Prototype

public final void writeInt(int v) throws IOException 

Source Link

Document

Writes an int to the underlying output stream as four bytes, high byte first.

Usage

From source file:Main.java

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

    int howMany = 20;

    ByteArrayOutputStream bout = new ByteArrayOutputStream(howMany * 4);
    DataOutputStream dout = new DataOutputStream(bout);

    for (int i = 0; i <= 20; i++) {
        dout.writeInt(i);
    }//from   ww  w.jav  a2 s  .c  om

    FileOutputStream fout = new FileOutputStream("fibonacci.dat");
    try {
        bout.writeTo(fout);
        fout.flush();
    } finally {
        fout.close();
    }
}

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From source file:MainClass.java

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

    int howMany = 20;

    // To avoid resizing the buffer, calculate the size of the
    // byte array in advance.
    ByteArrayOutputStream bout = new ByteArrayOutputStream(howMany * 4);
    DataOutputStream dout = new DataOutputStream(bout);

    for (int i = 0; i <= 20; i++) {
        dout.writeInt(i);
    }/*  w ww .j a  v  a2s . co  m*/

    FileOutputStream fout = new FileOutputStream("fibonacci.dat");
    try {
        bout.writeTo(fout);
        fout.flush();
    } finally {
        fout.close();
    }
}

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From source file:PrimeWriter.java

public static void main(String[] arguments) {
    int[] primes = new int[400];
    int numPrimes = 0;

    int candidate = 2;
    while (numPrimes < 400) {
        primes[numPrimes] = candidate;//w w  w  .  j  a  va 2 s.c  o m
        numPrimes++;
        candidate++;
    }

    try {
        FileOutputStream file = new FileOutputStream("p.dat");
        BufferedOutputStream buff = new BufferedOutputStream(file);
        DataOutputStream data = new DataOutputStream(buff);

        for (int i = 0; i < 400; i++)
            data.writeInt(primes[i]);
        data.close();
    } catch (IOException e) {
        System.out.println("Error - " + e.toString());
    }
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    double data[] = { 1.1, 2.2, 3.3, 4.4, 5.5, 6.6 };
    DataOutputStream fout = new DataOutputStream(new DeflaterOutputStream(new FileOutputStream("data.dat")));
    fout.writeInt(data.length);

    for (double d : data)
        fout.writeDouble(d);/* ww  w.  j  a v  a  2s . c o  m*/

    DataInputStream fin = new DataInputStream(new InflaterInputStream(new FileInputStream("data.dat")));
    int num = fin.readInt();

    double avg = 0.0;
    double d;

    for (int i = 0; i < num; i++) {
        d = fin.readDouble();
        avg += d;
        System.out.print(d + " ");
    }
    fin.close();
    fout.close();
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    FileOutputStream fos = new FileOutputStream("C:/WriteLong.txt");
    DataOutputStream dos = new DataOutputStream(fos);

    long l = 65;//from  w w  w  .j av a  2 s .c om
    dos.writeLong(l);

    for (int i = 0; i < 10; i++)
        dos.writeInt(i);

    dos.close();
}

---

From source file:MainClass.java

public static void main(String[] args) throws IOException {
    DataOutputStream dos = new DataOutputStream(
            new BufferedOutputStream(new FileOutputStream(new File("temp.tmp"))));
    for (int i = 0; i < 10; i++)
        dos.writeInt(i);
    dos.close();//from w  ww  .j  a  v a2s .c  o  m

}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(baos);

    MessageDigest md = MessageDigest.getInstance("MD5");
    SomeObject testObject = new SomeObject();

    dos.writeInt(testObject.count);
    dos.writeLong(testObject.product);//from w  ww  .j av  a 2  s. c o m
    dos.writeDouble(testObject.stdDev);
    dos.writeUTF(testObject.name);
    dos.writeChar(testObject.delimiter);
    dos.flush();

    byte[] hashBytes = md.digest(baos.toByteArray());
    BigInteger testObjectHash = new BigInteger(hashBytes);

    System.out.println("Hash " + testObjectHash);

    dos.close();

}

---

From source file:MainClass.java

public static void main(String args[]) {
    try {/*from   w w  w .  java 2  s  . c  om*/

        FileOutputStream fos = new FileOutputStream(args[0]);

        DataOutputStream dos = new DataOutputStream(fos);

        dos.writeBoolean(false);
        dos.writeByte(Byte.MAX_VALUE);
        dos.writeChar('A');
        dos.writeDouble(Double.MAX_VALUE);
        dos.writeFloat(Float.MAX_VALUE);
        dos.writeInt(Integer.MAX_VALUE);
        dos.writeLong(Long.MAX_VALUE);
        dos.writeShort(Short.MAX_VALUE);

        fos.close();
    } catch (Exception e) {
        System.out.println("Exception: " + e);
    }
}

---

From source file:com.payne.test.StringTest.java

public static void main(String[] args) throws IOException {
    //        String a = "160504185452148809-1";
    //        a = a.split("-")[0];
    //        System.out.println(a);
    //        Random r = new Random();
    //        long a = 0l;
    //        for(int i=0;i<10000;i++){
    //            a = r.nextInt(5001) + 5000;
    //            if(a==5000){
    //                System.out.println(a);
    //            }
    //        }/*from  w  ww  .  j  a  v  a  2s.  c o m*/

    /**
     * ????
     */
    //        List<Integer> numberList = new ArrayList<>();
    //        numberList.add(1);
    //        numberList.add(2);
    //        Integer[] numbers = numberList.toArray(new Integer[numberList.size()]);
    ////        int[] numbers = new int[]{1,2};
    //        
    //        System.out.println(new Integer[]{}.length==0?0:1);
    //        
    //        Student s =  new Student();
    //        s.sumUp(new Integer[]{}.length==0?numbers:new Integer[]{1});
    //        s.sumUp(numbers);
    //        Parent p = null;
    //        Parent p2 = new Parent(new Student(5));
    //
    //        Student s = new Student();
    //        p = s.print(p);

    //        System.out.println(p==null?0:1);
    //        System.out.println(p.getAge());
    //        System.out.println(p.getStudent().getAge());
    //        int ai = 0;
    //        for(int i=0;i<2;i++){
    //            int b = 0;
    //            int b_grow = 0;
    //            for(int j=0;j<5;j++){
    //                b += new Random().nextInt(5);
    //            }
    //            
    //        }
    //        
    //        
    //        System.out.println(UUID.randomUUID().toString());

    //        int a = 1;
    //        a = doAdd(a);
    //        System.out.println(a);
    Pattern p = Pattern.compile("^\\d{1,9}(.\\d{1,2})?$");
    Matcher m = p.matcher("666666541.13");
    boolean b = m.matches();
    System.out.println(b);
    //          System.out.println(-2>>4);
    //        BigDecimal b = new BigDecimal(100.50);
    //        System.out.println(b.toString());
    // indexOf   ??
    //        String a = "?";
    //        
    //        String[] split = a.split("?");
    //        if(a.indexOf("?")>-1){
    //            System.out.println("111");
    //        }
    //        for(String s: split){
    //            System.out.println(s);
    //        }
    //        MapTestObject mto = new MapTestObject();
    //        mto.setOrderType(OrderType.TWO);
    //        
    //        String str = "\":\"";
    //        System.out.println(str);
    //        String a = ",";
    ////
    //        String[] splits = a.split(".");
    //        List<String> asList = Arrays.asList(splits);

    //        String last = "";
    //        String last = "";
    //        String last = "";
    //        if (!asList.isEmpty()) {
    //            if (asList.indexOf(last) > -1) {
    //                int indexOf = asList.indexOf(last);
    //                if (indexOf + 1 >= asList.size()) {
    //                    System.out.println("?");
    //                }else{
    //                    String next = asList.get(indexOf + 1);
    //                    if (OTHERStringUtils.isEmpty(next)) {
    //                        System.out.println("?");
    //                    } else {
    //                        System.out.println("?" + next);
    //                    }
    //                }
    //            } else {
    //                System.out.println("?");
    //            }
    //        } else {
    //            System.out.println("??");
    //        }

    //           System.out.println("?\",\""); 
    //           String a ="1123";
    //           a = StringUtils.substring(a, 0, a.length()-1);
    //           System.out.println("a="+a);
    //           
    int a = 0x12345678;
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(baos);
    dos.writeInt(a);
    System.out.println(Integer.toHexString(a));
    byte[] c = baos.toByteArray();
    for (int i = 0; i < 4; i++) {
        System.out.println(Integer.toHexString(c[i]));
    }
}

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

/**
 * @param args//from  w ww.  j  a v  a 2s  .  c om
 */

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();
        }
    }

}

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