Example usage for java.nio ByteBuffer isReadOnly

Introduction

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

Prototype

public abstract boolean isReadOnly();

Source Link

Document

Indicates whether this buffer is read-only.

Usage

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.isReadOnly());
}

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From source file:net.darkmist.alib.io.BufferUtil.java

public static byte[] asBytes(ByteBuffer buf) {
    buf = buf.duplicate();//from   ww w . j  a v a  2s  .c  o  m
    /* To use buf.array() the buffer must:
     *    be writable as the array will be writable
     *    have arrayOffset() == 0 or the array will not start at the right location
     *    the returned array must be the same length as the buffer's limit or it will be the wrong size.
     */
    if (!buf.isReadOnly() && buf.hasArray() && buf.arrayOffset() == 0) {
        logger.debug("!read-only, hasArray && offset is 0");
        byte[] ret = buf.array();

        if (ret.length == buf.limit())
            return ret;
        logger.debug("length of array !=limit, doing copy...");
    }

    byte[] bytes = new byte[buf.limit()];
    buf.get(bytes, 0, buf.limit());
    return bytes;
}

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