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Some thing about the useful tools of the JDK 1.8.

There is a newer version: 4.0

package com.github.andyshao.util;

import java.nio.ByteBuffer;

import com.github.andyshao.convert.Convert;

/**
 * 
 * Descript:

 * Copyright: Copyright(c) Aug 4, 2014

 * Encoding:UNIX UTF-8
 * 
 * @author Andy.Shao
 *
 */
public final class ByteBuffereTools {
    @Deprecated
    public static String byte2Hex(byte[] bs) {
        StringBuilder builder = new StringBuilder();

        for (byte b : bs) {
            builder.append(Convert.BYTE_2_HEX.convert(b));
        }

        return builder.toString();
    }

    /**
     * Only return a space which great than buffer.position() and less than
     * buffer.limit()
     * 
     * @param buffer the buffer which has the info
     * @return return the byte array and the info in it
     */
    public static byte[] usedArray(ByteBuffer buffer) {
        return ArrayTools.splitArray(buffer.array() , buffer.position() , buffer.limit());
    }

    private ByteBuffereTools() {
        throw new AssertionError("No support instance " + ByteBuffereTools.class.getName());
    }
}