Java ByteBuffer to Hex bytesToHex(ByteBuffer bytes)

Description

bytes To Hex

License

Apache License

Declaration

public static String bytesToHex(ByteBuffer bytes) 

Method Source Code

//package com.java2s;
/**//from www.j  av  a2s .co m
 * 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;

import java.util.Arrays;

import java.util.Map;

public class Main {
    public static String bytesToHex(byte... bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            int bint = b & 0xff;
            if (bint <= 0xF)
                // toHexString does not 0 pad its results.
                sb.append("0");
            sb.append(Integer.toHexString(bint));
        }
        return sb.toString();
    }

    public static String bytesToHex(ByteBuffer bytes) {
        StringBuilder sb = new StringBuilder();
        for (int i = bytes.position() + bytes.arrayOffset(); i < bytes.limit() + bytes.arrayOffset(); i++) {
            int bint = bytes.array()[i] & 0xff;
            if (bint <= 0xF)
                // toHexString does not 0 pad its results.
                sb.append("0");
            sb.append(Integer.toHexString(bint));
        }
        return sb.toString();
    }

    public static String toString(Map<?, ?> map) {
        // wtf, why isn't something like this in guava or commons collections?
        StringBuilder sb = new StringBuilder("{");
        for (Map.Entry<?, ?> entry : map.entrySet()) {
            sb.append(toString(entry.getKey())).append(": ").append(toString(entry.getValue())).append(", ");
        }
        sb.append("}");
        return sb.toString();
    }

    /** slow! */
    private static Object toString(Object o) {
        return o.getClass().isArray() ? Arrays.toString((Object[]) o) : o.toString();
    }
}

Related

1. asHexString(ByteBuffer buffer)
2. asHexString(StringBuilder temp, ByteBuffer buffer)
3. byteBufferToHex(ByteBuffer buffer)
4. bytesToHex(ByteBuffer bytes)
5. bytesToHexString(ByteBuffer b)
6. toHex(ByteBuffer bb)
7. toHex(ByteBuffer bb)
8. toHex(ByteBuffer buf)