Example usage for java.nio ByteBuffer allocateDirect

Introduction

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

Prototype

public static ByteBuffer allocateDirect(int capacity)

Source Link

Document

Creates a direct byte buffer based on a newly allocated memory block.

Usage

From source file:Main.java

public static IntBuffer newIntBuffer(int numInts) {
    ByteBuffer buffer = ByteBuffer.allocateDirect(numInts * 4);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asIntBuffer();
}

From source file:Main.java

/**buffer methods*/

public static IntBuffer makeIntBuffer(int[] array) {
    final int integerSize = Integer.SIZE / 8;
    ByteBuffer byteBuffer = ByteBuffer.allocateDirect(array.length * integerSize);
    byteBuffer.order(ByteOrder.nativeOrder());
    IntBuffer intBuffer = byteBuffer.asIntBuffer();
    intBuffer.put(array);/*from w  w  w.  ja  v  a2 s . c om*/
    intBuffer.position(0);
    return intBuffer;
}

From source file:Main.java

public static CharBuffer newCharBuffer(int numChars) {
    ByteBuffer buffer = ByteBuffer.allocateDirect(numChars * 2);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asCharBuffer();
}

From source file:Main.java

public static LongBuffer newLongBuffer(int numLongs) {
    ByteBuffer buffer = ByteBuffer.allocateDirect(numLongs * 8);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asLongBuffer();
}

From source file:Main.java

public static ShortBuffer newShortBuffer(int numShorts) {
    ByteBuffer buffer = ByteBuffer.allocateDirect(numShorts * 2);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asShortBuffer();
}

From source file:Main.java

public static FloatBuffer newFloatBuffer(int numFloats) {
    ByteBuffer buffer = ByteBuffer.allocateDirect(numFloats * 4);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asFloatBuffer();
}

From source file:Main.java

public static DoubleBuffer newDoubleBuffer(int numDoubles) {
    ByteBuffer buffer = ByteBuffer.allocateDirect(numDoubles * 8);
    buffer.order(ByteOrder.nativeOrder());
    return buffer.asDoubleBuffer();
}

From source file:Main.java

public static DoubleBuffer createDoubleBuffer(final int size) {
    final DoubleBuffer buf = ByteBuffer.allocateDirect(SIZEOF_DOUBLE * size).order(ByteOrder.nativeOrder())
            .asDoubleBuffer();// w  w  w .  j  av  a  2 s . c  o m
    buf.clear();
    return buf;
}

From source file:Main.java

public static ShortBuffer createShortBuffer(final int size) {
    final ShortBuffer buf = ByteBuffer.allocateDirect(SIZEOF_SHORT * size).order(ByteOrder.nativeOrder())
            .asShortBuffer();/*  w  w w. j  a  v  a 2s  .  com*/
    buf.clear();
    return buf;
}

From source file:Main.java

public static void copy(ReadableByteChannel src, WritableByteChannel dest) throws IOException {
    ByteBuffer buffer = ByteBuffer.allocateDirect(CAPACITY);
    while (src.read(buffer) != -1) {
        buffer.flip();/* w ww .  j a  v  a2s  .c om*/
        dest.write(buffer);
        buffer.compact();
    }

    buffer.flip();

    while (buffer.hasRemaining()) {
        dest.write(buffer);
    }
}