Example usage for java.io DataOutputStream writeDouble

Introduction

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

Prototype

public final void writeDouble(double v) throws IOException 

Source Link

Document

Converts the double argument to a long using the doubleToLongBits method in class Double, and then writes that long value to the underlying output stream as an 8-byte quantity, high byte first.

Usage

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);//from w  w w  .j a va  2s. co m
    dos.writeLong(testObject.product);
    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();

}

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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]);
        out.writeChar('\t');
        out.writeInt(units[i]);//from  www .  j av  a  2  s  . c  o m
        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();
}

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From source file:Main.java

public static void writeDecimal(DataOutputStream out, double val) throws IOException {
    out.writeDouble(val);
}

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From source file:WriteBinaryFile.java

private static void writeMovie(Product m, DataOutputStream out) throws Exception {
    out.writeUTF(m.title);/*www .ja  va2s . c  om*/
    out.writeInt(m.year);
    out.writeDouble(m.price);
}

---

From source file:MainClass.java

public static byte[] makeBytes(long t, double q) {
    try {//from   w ww.  j  a  va  2  s .  c  o  m
        ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
        DataOutputStream dataOut = new DataOutputStream(byteOut);
        dataOut.writeLong(t);
        dataOut.writeDouble(q);
        return byteOut.toByteArray();
    } catch (IOException e) {
        return new byte[0];
    }
}

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From source file:Main.java

public static byte[] createAuthenticationDigest(String passcode, long t1, double q1)
        throws IOException, NoSuchAlgorithmException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream(512);
    DataOutputStream out = new DataOutputStream(baos);
    byte[] digest = createDigest(passcode, t1, q1);
    out.writeLong(t1);//from  ww  w. ja v a  2  s  . com
    out.writeDouble(q1);
    out.writeInt(digest.length);
    out.write(digest);
    out.flush();
    return baos.toByteArray();
}

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From source file:cfa.vo.interop.EncodeDoubleArray.java

private static byte[] doubleToByte(double[] data) throws IOException {

    ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
    DataOutputStream outputStream = new DataOutputStream(byteStream);

    try {/*  ww  w  . j  ava  2 s  .c o  m*/

        for (int ii = 0; ii < data.length; ii++)
            outputStream.writeDouble(data[ii]);

    } catch (EOFException e) {
        throw new IOException("Unable to read from dataInputStream, found EOF");

    } catch (IOException e) {
        throw new IOException("Unable to read from dataInputStream, IO error");
    }

    byte[] result = byteStream.toByteArray();

    return result;
}

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From source file:com.opensoc.json.serialization.JSONEncoderHelper.java

public static void putNumber(DataOutputStream data, Number value) throws IOException {
    // TODO Auto-generated method stub
    data.writeByte(JSONKafkaSerializer.NumberID);
    if (value instanceof Double) {
        data.writeByte(0);//  w  w w  . j  a va2s.c  om
        data.writeDouble((Double) value);
        return;
    }
    data.writeByte(1);
    data.writeLong((Long) value);

}

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From source file:org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.java

private static void serializeMeter(DataOutputStream dos, Meter meter) throws IOException {
    dos.writeDouble(meter.getRate());
}

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From source file:org.apache.flink.runtime.metrics.dump.MetricDumpSerialization.java

private static void serializeHistogram(DataOutputStream dos, Histogram histogram) throws IOException {
    HistogramStatistics stat = histogram.getStatistics();

    dos.writeLong(stat.getMin());/*from   w  w w .  j av  a2 s  .com*/
    dos.writeLong(stat.getMax());
    dos.writeDouble(stat.getMean());
    dos.writeDouble(stat.getQuantile(0.5));
    dos.writeDouble(stat.getStdDev());
    dos.writeDouble(stat.getQuantile(0.75));
    dos.writeDouble(stat.getQuantile(0.90));
    dos.writeDouble(stat.getQuantile(0.95));
    dos.writeDouble(stat.getQuantile(0.98));
    dos.writeDouble(stat.getQuantile(0.99));
    dos.writeDouble(stat.getQuantile(0.999));
}

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