Java ByteBuffer Print printByteBuffer(ByteBuffer buf)

Description

print Byte Buffer

License

Apache License

Declaration

public static String printByteBuffer(ByteBuffer buf) 

Method Source Code

//package com.java2s;
/*/* ww  w .  j a  v  a 2s  . co m*/
 * Copyright 2016 ProtectWise, Inc.
 *
 * Licensed 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.io.StringWriter;
import java.nio.ByteBuffer;

public class Main {
    public static String printByteBuffer(ByteBuffer buf) {
        StringWriter w = new StringWriter();

        byte[] data = bbToArray(buf);

        w.append('[');
        w.append(formatHex(data));

        if (data.length == 4) {
            w.append(" int:");
            w.append(Integer.toString(buf.duplicate().getInt()));
        } else if (data.length == 8) {
            w.append(" long:");
            w.append(Long.toString(buf.duplicate().getLong()));
        }
        w.append(']');
        return w.toString();
    }

    public static byte[] bbToArray(ByteBuffer bb) {
        byte[] bytes = new byte[bb.remaining()];
        bb.duplicate().get(bytes);
        return bytes;
    }

    public static String formatHex(byte[] data) {
        StringWriter w = new StringWriter();
        for (byte b : data) {
            w.append(padLeft(Integer.toHexString(b), 2, '0'));
        }
        return w.toString();
    }

    public static String padLeft(String base, int length, char pad) {
        if (base.length() >= length) {
            return base;
        }
        return String.format("%" + (length - base.length()) + "s", "").replace(' ', pad) + base;
    }
}

Related

1. print(ByteBuffer bb)
2. print(ByteBuffer byteBuffer)
3. printBuffer(ByteBuffer buffer)
4. printBuffer(ByteBuffer buffer)
5. printBuffer(String msg, ByteBuffer buffer)
6. printData(ByteBuffer buf, int offset, int len)
7. printData(ByteBuffer buffer, int len)
8. printImageContentsSubset(ByteBuffer buf, int w, int h)
9. println(String string, ByteBuffer buffer)