Java ByteBuffer to Byte Array toBytes(ByteBuffer buffer, int offset, int length)

Description

Copy the given number of bytes from specified offset into a new byte[]

License

Apache License

Parameter

Parameter	Description
buffer	a parameter
offset	a parameter
length	a parameter

Return

a new byte[] containing the bytes in the specified range

Declaration

public static byte[] toBytes(ByteBuffer buffer, int offset, int length) 

Method Source Code

//package com.java2s;
/*/*ww  w . j  av a 2 s . com*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

import java.nio.ByteBuffer;

public class Main {
    /**
     * Copy the bytes from position to limit into a new byte[] of the exact length and sets the
     * position and limit back to their original values (though not thread safe).
     * @param buffer copy from here
     * @param startPosition put buffer.get(startPosition) into byte[0]
     * @return a new byte[] containing the bytes in the specified range
     */
    public static byte[] toBytes(ByteBuffer buffer, int startPosition) {
        int originalPosition = buffer.position();
        byte[] output = new byte[buffer.limit() - startPosition];
        buffer.position(startPosition);
        buffer.get(output);
        buffer.position(originalPosition);
        return output;
    }

    /**
     * Copy the given number of bytes from specified offset into a new byte[]
     * @param buffer
     * @param offset
     * @param length
     * @return a new byte[] containing the bytes in the specified range
     */
    public static byte[] toBytes(ByteBuffer buffer, int offset, int length) {
        byte[] output = new byte[length];
        for (int i = 0; i < length; i++) {
            output[i] = buffer.get(offset + i);
        }
        return output;
    }
}

Related

1. toByteArray(ByteBuffer bytes)
2. toByteArrayByByteBuffer(int value)
3. toBytes(ByteBuffer buff)
4. toBytes(ByteBuffer buffer)
5. toBytes(ByteBuffer buffer)
6. toBytes(ByteBuffer buffer, int startPosition)
7. toBytes(ByteBuffer value)
8. toBytes(final ByteBuffer bb)