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:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    bb.asCharBuffer().put("Howdy!");
    char c;//  w w w. ja va  2s .  c  om
    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());

}

From source file:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    bb.asIntBuffer().put(99471142);//from w  w  w  .  j av  a  2  s  .  c  o m
    System.out.println(bb.getInt());

    bb = ByteBuffer.allocate(BSIZE);
    bb.asLongBuffer().put(99472342341142L);
    System.out.println(bb.getLong());

    bb = ByteBuffer.allocate(BSIZE);

    bb.asFloatBuffer().put(99471142);
    System.out.println(bb.getFloat());

    bb = ByteBuffer.allocate(BSIZE);

    bb.asDoubleBuffer().put(99471142);
    System.out.println(bb.getDouble());

}

From source file:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    bb.asCharBuffer().put("java2s!");
    byte[] dst = new byte[BSIZE];
    bb.rewind();//ww  w  .j a va 2  s  .  c o  m
    bb.get(dst, 0, 3);
    System.out.println(Arrays.toString(dst));

}

From source file:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    bb.asCharBuffer().put("java2s!");
    bb.rewind();//from  ww w .j  a va2s  .  c  om
    byte[] dst = new byte[BSIZE];
    bb.get(dst);
    System.out.println(Arrays.toString(dst));

}

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.order(ByteOrder.BIG_ENDIAN);

    bbuf.put("java2s.com".getBytes());

    System.out.println(Arrays.toString(bbuf.array()));
}

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.order(ByteOrder.LITTLE_ENDIAN);

    bbuf.put("java2s.com".getBytes());

    System.out.println(Arrays.toString(bbuf.array()));
}

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.order(ByteOrder.nativeOrder());

    bbuf.put("java2s.com".getBytes());

    System.out.println(Arrays.toString(bbuf.array()));
}

From source file:Main.java

public static void main(String[] argv) throws Exception {

    byte[] bytes = new byte[10];
    ByteBuffer buf = ByteBuffer.allocate(10);
    buf = ByteBuffer.wrap(bytes);

    System.out.println(Arrays.toString(buf.array()));
    System.out.println(buf.toString());
}

From source file:MainClass.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    IntBuffer ib = bb.asIntBuffer();

    ib.put(new int[] { 1, 2, 7, 9, 3, 8, 6 });

    System.out.println(ib.get(3));
    ib.put(3, 1811);/* w  ww .  j a va 2 s.  c o  m*/
    ib.rewind();
    while (ib.hasRemaining()) {
        int i = ib.get();
        if (i == 0)
            break; // Else we'll get the entire buffer
        System.out.println(i);
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    ByteBuffer bbuf = ByteBuffer.allocate(100);
    File file = new File("filename");

    boolean append = false;

    FileChannel wChannel = new FileOutputStream(file, append).getChannel();

    wChannel.write(bbuf);//  www. j  a v  a2  s.c  o m

    wChannel.close();
}