List of usage examples for java.nio ByteBuffer position
public final int position()
From source file:Main.java
public static void main(String[] args) throws Exception { String phrase = new String("www.java2s.com\n"); File aFile = new File("test.txt"); FileOutputStream outputFile = null; outputFile = new FileOutputStream(aFile, true); System.out.println("File stream created successfully."); FileChannel outChannel = outputFile.getChannel(); ByteBuffer buf = ByteBuffer.allocate(1024); System.out.println("New buffer: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); // Load the data into the buffer for (char ch : phrase.toCharArray()) { buf.putChar(ch);/*from w w w. ja v a 2 s. c o m*/ } System.out.println("Buffer after loading: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); buf.flip(); System.out.println("Buffer after flip: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); outChannel.write(buf); outputFile.close(); System.out.println("Buffer contents written to file."); }
From source file:MainClass.java
public static void main(String[] args) { String[] phrases = { "A", "B 1", "C 1.3" }; String dirname = "C:/test"; String filename = "Phrases.txt"; File dir = new File(dirname); File aFile = new File(dir, filename); FileOutputStream outputFile = null; try {/*from w w w. ja va 2s . c o m*/ outputFile = new FileOutputStream(aFile, true); } catch (FileNotFoundException e) { e.printStackTrace(System.err); } FileChannel outChannel = outputFile.getChannel(); ByteBuffer buf = ByteBuffer.allocate(1024); System.out.println(buf.position()); System.out.println(buf.limit()); System.out.println(buf.capacity()); CharBuffer charBuf = buf.asCharBuffer(); System.out.println(charBuf.position()); System.out.println(charBuf.limit()); System.out.println(charBuf.capacity()); Formatter formatter = new Formatter(charBuf); int number = 0; for (String phrase : phrases) { formatter.format("%n %s", ++number, phrase); System.out.println(charBuf.position()); System.out.println(charBuf.limit()); System.out.println(charBuf.capacity()); charBuf.flip(); System.out.println(charBuf.position()); System.out.println(charBuf.limit()); System.out.println(charBuf.length()); buf.limit(2 * charBuf.length()); // Set byte buffer limit System.out.println(buf.position()); System.out.println(buf.limit()); System.out.println(buf.remaining()); try { outChannel.write(buf); buf.clear(); charBuf.clear(); } catch (IOException e) { e.printStackTrace(System.err); } } try { outputFile.close(); } catch (IOException e) { e.printStackTrace(System.err); } }
From source file:MainClass.java
public static void main(String[] args) { String phrase = new String("text \n"); String dirname = "C:/test"; String filename = "charData.txt"; File dir = new File(dirname); File aFile = new File(dir, filename); FileOutputStream outputFile = null; try {// w w w. j a v a 2 s .c o m outputFile = new FileOutputStream(aFile, true); System.out.println("File stream created successfully."); } catch (FileNotFoundException e) { e.printStackTrace(System.err); } FileChannel outChannel = outputFile.getChannel(); ByteBuffer buf = ByteBuffer.allocate(1024); System.out.println("New buffer: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); for (char ch : phrase.toCharArray()) { buf.putChar(ch); } System.out.println("Buffer after loading: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); buf.flip(); System.out.println("Buffer after flip: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); try { outChannel.write(buf); outputFile.close(); System.out.println("Buffer contents written to file."); } catch (IOException e) { e.printStackTrace(System.err); } }
From source file:MainClass.java
public static void main(String[] args) { String phrase = new String("www.java2s.com\n"); File aFile = new File("test.txt"); FileOutputStream outputFile = null; try {/*from w w w . ja va2 s . c om*/ outputFile = new FileOutputStream(aFile, true); System.out.println("File stream created successfully."); } catch (FileNotFoundException e) { e.printStackTrace(System.err); } FileChannel outChannel = outputFile.getChannel(); ByteBuffer buf = ByteBuffer.allocate(1024); System.out.println("New buffer: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); // Load the data into the buffer for (char ch : phrase.toCharArray()) { buf.putChar(ch); } System.out.println("Buffer after loading: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); buf.flip(); System.out.println("Buffer after flip: position = " + buf.position() + "\tLimit = " + buf.limit() + "\tcapacity = " + buf.capacity()); try { outChannel.write(buf); outputFile.close(); System.out.println("Buffer contents written to file."); } catch (IOException e) { e.printStackTrace(System.err); } }
From source file:MainClass.java
public static void main(String[] args) { ByteBuffer bb = ByteBuffer.wrap(new byte[] { 0, 0, 0, 0, 0, 0, 0, 'a' }); bb.rewind();/* www .j ava 2s . c om*/ System.out.println("Byte Buffer"); while (bb.hasRemaining()) System.out.println(bb.position() + " -> " + bb.get()); }
From source file:MainClass.java
public static void main(String[] args) { File aFile = new File("afile.txt"); FileOutputStream outputFile = null; try {/*from w w w. java2 s . c o m*/ outputFile = new FileOutputStream(aFile, true); System.out.println("File stream created successfully."); } catch (FileNotFoundException e) { e.printStackTrace(System.err); } ByteBuffer buf = ByteBuffer.allocate(1024); System.out.println("\nByte buffer:"); System.out.printf("position = %2d Limit = %4d capacity = %4d%n", buf.position(), buf.limit(), buf.capacity()); // Create a view buffer CharBuffer charBuf = buf.asCharBuffer(); System.out.println("Char view buffer:"); System.out.printf("position = %2d Limit = %4d capacity = %4d%n", charBuf.position(), charBuf.limit(), charBuf.capacity()); try { outputFile.close(); // Close the O/P stream & the channel } catch (IOException e) { e.printStackTrace(System.err); } }
From source file:Main.java
public static void main(String[] args) { ByteBuffer bb = ByteBuffer.allocate(8); System.out.println("Capacity: " + bb.capacity()); System.out.println("Limit: " + bb.limit()); System.out.println("Position: " + bb.position()); // The mark is not set for a new buffer. Calling the // reset() method throws a runtime exception if the mark is not set. try {/*w w w.j a v a 2 s .c o m*/ bb.reset(); System.out.println("Mark: " + bb.position()); } catch (InvalidMarkException e) { System.out.println("Mark is not set"); } }
From source file:Main.java
public static void main(String[] args) { ByteBuffer bb = ByteBuffer.wrap(new byte[] { 0, 0, 0, 0, 0, 0, 0, 'a' }); bb.rewind();//w ww .ja va 2 s . co m System.out.println("Byte Buffer"); while (bb.hasRemaining()) System.out.println(bb.position() + " -> " + bb.get()); CharBuffer cb = ((ByteBuffer) bb.rewind()).asCharBuffer(); System.out.println("Char Buffer"); while (cb.hasRemaining()) System.out.println(cb.position() + " -> " + cb.get()); FloatBuffer fb = ((ByteBuffer) bb.rewind()).asFloatBuffer(); System.out.println("Float Buffer"); while (fb.hasRemaining()) System.out.println(fb.position() + " -> " + fb.get()); IntBuffer ib = ((ByteBuffer) bb.rewind()).asIntBuffer(); System.out.println("Int Buffer"); while (ib.hasRemaining()) System.out.println(ib.position() + " -> " + ib.get()); LongBuffer lb = ((ByteBuffer) bb.rewind()).asLongBuffer(); System.out.println("Long Buffer"); while (lb.hasRemaining()) System.out.println(lb.position() + " -> " + lb.get()); ShortBuffer sb = ((ByteBuffer) bb.rewind()).asShortBuffer(); System.out.println("Short Buffer"); while (sb.hasRemaining()) System.out.println(sb.position() + " -> " + sb.get()); DoubleBuffer db = ((ByteBuffer) bb.rewind()).asDoubleBuffer(); System.out.println("Double Buffer"); while (db.hasRemaining()) System.out.println(db.position() + " -> " + db.get()); }
From source file:Main.java
public static void main(String[] argv) throws Exception { ByteBuffer bbuf = ByteBuffer.allocate(10); int capacity = bbuf.capacity(); // 10 System.out.println(capacity); bbuf.putShort(2, (short) 123); System.out.println(Arrays.toString(bbuf.array())); System.out.println(bbuf.position()); }
From source file:com.openteach.diamond.network.waverider.session.DefaultSession.java
public static void main(String[] args) { BlockingQueue<ByteBuffer> inputBuffer = new LinkedBlockingQueue<ByteBuffer>(); /*for (int i = 0; i < 10; i++) {*///from w w w .j av a2s. co m ByteBuffer byteBuffer = ByteBuffer.allocate(1024); byteBuffer.put(makePacket().marshall()); byteBuffer.put(makePacket().marshall()); byteBuffer.flip(); byte[] b = new byte[8]; ByteBuffer halfBuf0 = ByteBuffer.allocate(8); byteBuffer.get(b); halfBuf0.put(b); halfBuf0.flip(); inputBuffer.add(halfBuf0); inputBuffer.add(byteBuffer); /*}*/ int size = 0; int oldSize = size; long length = Packet.getHeaderSize(); ByteBuffer buffer = ByteBuffer.allocate(NetWorkConstants.DEFAULT_NETWORK_BUFFER_SIZE); ByteBuffer currentBuffer = null; while (size < length) { currentBuffer = inputBuffer.peek(); oldSize = size; int position = currentBuffer.position(); size += currentBuffer.remaining(); buffer.put(currentBuffer); if (size >= Packet.getHeaderSize()) { length = buffer.getLong(Packet.getLengthPosition()); } if (size <= length) { inputBuffer.remove(); } else { currentBuffer.position(position); buffer.position(buffer.position() - currentBuffer.remaining()); byte[] buf = new byte[(int) (length - oldSize)]; currentBuffer.get(buf); buffer.put(buf); } } // buffer.position(0); buffer.flip(); Packet packet = Packet.unmarshall(buffer); Command command = CommandFactory.createCommand(packet.getType(), packet.getPayLoad()); String str = new String(command.getPayLoad().array()); System.out.println(str); }