Java ByteBuffer to UTF toUtf8String(ByteBuffer buffer)

Description

to Utf String

License

Open Source License

Declaration

public static String toUtf8String(ByteBuffer buffer) 

Method Source Code

//package com.java2s;
/*// ww  w .j a va  2 s .c  o  m
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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.nio.ByteBuffer;

import java.nio.charset.StandardCharsets;

public class Main {
    private static final String EMPTY = "";

    public static String toUtf8String(ByteBuffer buffer) {
        if (!buffer.hasRemaining()) {
            return EMPTY;
        }
        if (buffer.hasArray()) {
            return new String(buffer.array(), buffer.arrayOffset() + buffer.position(), buffer.remaining(),
                    StandardCharsets.UTF_8);
        } else {
            byte[] content = new byte[buffer.remaining()];
            buffer.get(content);
            return new String(content, StandardCharsets.UTF_8);
        }
    }

    public static String toUtf8String(ByteBuffer... buffers) {
        int size = 0;
        for (ByteBuffer buf : buffers) {
            size += buf.remaining();
        }
        if (size == 0) {
            return EMPTY;
        }

        int index = 0;
        byte[] bytes = new byte[size];
        for (ByteBuffer buf : buffers) {
            if (buf.hasArray()) {
                int len = buf.remaining();
                System.arraycopy(buf.array(), buf.arrayOffset() + buf.position(), bytes, index, len);
                index += len;
            } else {
                int len = buf.remaining();
                buf.get(bytes, index, len);
                index += len;
            }
        }
        return new String(bytes, StandardCharsets.UTF_8);
    }
}

Related

1. readUTF(ByteBuffer bb)
2. readUTF8(ByteBuffer buf)
3. readUTFString(MappedByteBuffer mmap)
4. toUtf8CharBuffer(ByteBuffer buffer)
5. toUTF8String(ByteBuffer buffer)
6. toUtf8String(ByteBuffer byteBuffer)