Example usage for java.nio ByteBuffer allocate

Introduction

In this page you can find the example usage for java.nio ByteBuffer allocate.

Prototype

public static ByteBuffer allocate(int capacity)

Source Link

Document

Creates a byte buffer based on a newly allocated byte array.

Usage

From source file:MainClass.java

public static void main(String[] argv) throws Exception {
    ByteBuffer bb = ByteBuffer.allocate(20);

    bb.put((byte) 0x07);
    bb.put((byte) 0x08);
    bb.put((byte) 0x09);
    bb.put((byte) 0x10);
    bb.put((byte) 0x11);
    bb.put((byte) 0x12);
    bb.put((byte) 0x13);
    bb.put((byte) 0x14);

    bb.position(1).limit(5);//  www  .ja v  a2  s . co m
    bb.mark();

    System.out.println("Expect an exception here");
    System.out.println("" + bb.order().toString() + ": " + bb.getLong());

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    ByteBuffer buf = ByteBuffer.allocate(10);
    OutputStream os = new ByteBufferBackedOutputStream(buf);
    InputStream is = new ByteBufferBackedInputStream(buf);
}

From source file:Buffers.java

public static void main(String[] args) {
    try {/* w ww .j  a v a 2s. c  o m*/
        float[] floats = { 6.61E-39F, 9.918385E-39F };

        ByteBuffer bb = ByteBuffer.allocate(floats.length * 4);

        FloatBuffer fb = bb.asFloatBuffer();
        fb.put(floats);

        CharBuffer cb = bb.asCharBuffer();
        System.out.println(cb.toString());

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

From source file:Main.java

public static void main(String[] argv) throws Exception {
    ByteBuffer byteBuffer = ByteBuffer.allocate(7).order(ByteOrder.BIG_ENDIAN);
    CharBuffer charBuffer = byteBuffer.asCharBuffer();

    byteBuffer.put(0, (byte) 0);
    byteBuffer.put(1, (byte) 'H');
    byteBuffer.put(2, (byte) 0);
    byteBuffer.put(3, (byte) 'i');
    byteBuffer.put(4, (byte) 0);
    byteBuffer.put(5, (byte) '!');
    byteBuffer.put(6, (byte) 0);

    println(byteBuffer);/*from w  w w .  j  ava 2s  .  c  o  m*/
    println(charBuffer);

    // now slice it differently
    byteBuffer.position(4);
    charBuffer = byteBuffer.asCharBuffer();

    println(byteBuffer);
    println(charBuffer);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    FileChannel fc = new FileInputStream("data.txt").getChannel();
    ByteBuffer buff = ByteBuffer.allocate(BSIZE);
    fc.read(buff);/*from www .ja v  a 2s . c o m*/
    buff.flip();
    while (buff.hasRemaining())
        System.out.print((char) buff.get());
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    FileChannel fc = new FileOutputStream("data2.txt").getChannel();
    ByteBuffer buff = ByteBuffer.allocate(24); // More than needed
    buff.asCharBuffer().put("Some text");
    fc.write(buff);//from ww w .ja v  a 2 s  .  c o m
    fc.close();

    fc = new FileInputStream("data2.txt").getChannel();
    buff.clear();
    fc.read(buff);
    buff.flip();
    System.out.println(buff.asCharBuffer());

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    CharsetEncoder encoder = Charset.forName("US-ASCII").newEncoder();

    String response = "java2s.com";

    ByteBuffer bb = ByteBuffer.allocate(10);

    System.out.println(encoder.encode(CharBuffer.wrap(response), bb, true));
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    CharsetEncoder encoder = Charset.forName("US-ASCII").newEncoder();

    String response = "java2s.com";

    ByteBuffer bb = ByteBuffer.allocate(10);

    System.out.println(encoder.flush(bb));
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    FileInputStream fIn = new FileInputStream("test.txt");
    FileChannel fChan = fIn.getChannel();

    long fSize = fChan.size();
    ByteBuffer mBuf = ByteBuffer.allocate((int) fSize);

    fChan.read(mBuf, 10);//from www  .  ja  v a 2  s .c o m
    mBuf.rewind();

    for (int i = 0; i < fSize; i++) {
        System.out.print((char) mBuf.get());
    }
    fChan.close();
    fIn.close();
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    FileInputStream fIn = new FileInputStream("test.txt");
    FileChannel fChan = fIn.getChannel();

    long fSize = fChan.size();
    ByteBuffer mBuf = ByteBuffer.allocate((int) fSize);

    fChan.read(mBuf);// w w  w .j a  va2 s .c  o  m
    mBuf.rewind();

    for (int i = 0; i < fSize; i++) {
        System.out.print((char) mBuf.get());
    }
    fChan.close();
    fIn.close();
}