深度复制Java的ByteBuffer复制（） [英] Deep copy duplicate() of Java's ByteBuffer

问题描述

java.nio.ByteBuffer＃duplicate（）返回一个共享旧缓冲区内容的新字节缓冲区。旧缓冲区内容的更改将在新缓冲区中可见，反之亦然。如果我想要字节缓冲区的深层副本怎么办？

java.nio.ByteBuffer#duplicate() returns a new byte buffer that shares the old buffer's content. Changes to the old buffer's content will be visible in the new buffer, and vice versa. What if I want a deep copy of the byte buffer?

推荐答案

我认为深层副本不需要涉及字节[] 。请尝试以下方法：

I think the deep copy need not involve byte[]. Try the following:

public static ByteBuffer clone(ByteBuffer original) {
       ByteBuffer clone = ByteBuffer.allocate(original.capacity());
       original.rewind();//copy from the beginning
       clone.put(original);
       original.rewind();
       clone.flip();
       return clone;
}

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