Example usage for java.nio ByteBuffer limit

Introduction

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

Prototype

public final int limit()

Source Link

Document

Returns the limit of this buffer.

Usage

From source file:GetData.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    // Allocation automatically zeroes the ByteBuffer:
    int i = 0;//from  w w w.j a v a 2s  .  c o  m
    while (i++ < bb.limit())
        if (bb.get() != 0)
            System.out.println("nonzero");
    System.out.println("i = " + i);
    bb.rewind();
    // Store and read a char array:
    bb.asCharBuffer().put("Howdy!");
    char c;
    while ((c = bb.getChar()) != 0)
        System.out.print(c + " ");
    System.out.println();
    bb.rewind();
    // Store and read a short:
    bb.asShortBuffer().put((short) 471142);
    System.out.println(bb.getShort());
    bb.rewind();
    // Store and read an int:
    bb.asIntBuffer().put(99471142);
    System.out.println(bb.getInt());
    bb.rewind();
    // Store and read a long:
    bb.asLongBuffer().put(99471142);
    System.out.println(bb.getLong());
    bb.rewind();
    // Store and read a float:
    bb.asFloatBuffer().put(99471142);
    System.out.println(bb.getFloat());
    bb.rewind();
    // Store and read a double:
    bb.asDoubleBuffer().put(99471142);
    System.out.println(bb.getDouble());
    bb.rewind();

}

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 www.j a v  a2 s .  com
        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) {
    File aFile = new File("afile.txt");
    FileOutputStream outputFile = null;
    try {/* w w w.j  av  a 2  s .c om*/
        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) throws Exception {
    DatagramChannel client = null;
    client = DatagramChannel.open();

    client.bind(null);/*from  www  .  j a va2s.  c  o  m*/

    String msg = "Hello";
    ByteBuffer buffer = ByteBuffer.wrap(msg.getBytes());
    InetSocketAddress serverAddress = new InetSocketAddress("localhost", 8989);

    client.send(buffer, serverAddress);
    buffer.clear();
    client.receive(buffer);
    buffer.flip();
    int limits = buffer.limit();
    byte bytes[] = new byte[limits];
    buffer.get(bytes, 0, limits);
    String response = new String(bytes);
    System.out.println("Server  responded: " + response);
    client.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DatagramChannel server = null;
    server = DatagramChannel.open();
    InetSocketAddress sAddr = new InetSocketAddress("localhost", 8989);
    server.bind(sAddr);//from w ww.  ja  va 2  s  . c o  m
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    while (true) {
        System.out.println("Waiting for a  message  from" + "  a  remote  host at " + sAddr);
        SocketAddress remoteAddr = server.receive(buffer);
        buffer.flip();
        int limits = buffer.limit();
        byte bytes[] = new byte[limits];
        buffer.get(bytes, 0, limits);
        String msg = new String(bytes);

        System.out.println("Client at " + remoteAddr + "  says: " + msg);
        buffer.rewind();
        server.send(buffer, remoteAddr);
        buffer.clear();
    }
    //server.close();
}

From source file:Main.java

public static void printBufferInfo(ByteBuffer bb) {
    int limit = bb.limit();
    System.out.println("Position =  " + bb.position() + ", Limit   = " + limit);
    for (int i = 0; i < limit; i++) {
        System.out.print(bb.get(i) + "  ");
    }//from   www  . j a  v  a2 s . c  o m
    System.out.println();
}

From source file:Main.java

/**
 * continue writing to bb starting from its current limit.
 * /*from w  ww  . j a  va 2s . c om*/
 * @param bb
 */
public static void extend(ByteBuffer bb) {
    bb.position(bb.limit()).limit(bb.capacity());
}

From source file:Main.java

public final static int limitP(final ByteBuffer bb, final int i) {
    return bb.limit(bb.limit() + i).limit();

}

From source file:Main.java

public static ByteBuffer copy(ByteBuffer buffer) {

    final int length = buffer.limit() - buffer.position();
    final ByteOrder o = buffer.order();
    final ByteBuffer r = ByteBuffer.allocate(length);
    r.order(o);//  w  w  w  .j a va 2 s. c  om

    r.put(buffer);
    r.clear(); // Reset position and limit after the put()

    return r;

}

From source file:Main.java

public static byte[] array(ByteBuffer byteBuffer) {
    ByteBuffer byteBuffer2 = byteBuffer.duplicate();
    byte[] arrby = new byte[byteBuffer2.limit()];
    byteBuffer2.rewind();/*  w  w w  .  j  a va2 s . c  o m*/
    byteBuffer2.get(arrby);
    return arrby;
}