本文通过示例介绍了如何在 Java 中使用 ByteBuffer 进行基本操作，包括创建字节数组、将其包装为缓冲区、读取缓冲区中的数据以及清空缓冲区。
// Create a byte array
byte[] bytes = new byte[10];
// Wrap a byte array into a buffer
ByteBuffer buf = ByteBuffer.wrap(bytes);
// Retrieve bytes between the position and limit
// (see Putting Bytes into a ByteBuffer)
bytes = new byte[buf.remaining()];
// transfer bytes from this buffer into the given destination array
buf.get(bytes, 0, bytes.length);
// Retrieve all bytes in the buffer
buf.clear();
bytes = new byte[buf.capacity()];
// transfer bytes from this buffer into the given destination array
buf.get(bytes, 0, bytes.length);
byte[] bytes = new byte[10];
// Wrap a byte array into a buffer
ByteBuffer buf = ByteBuffer.wrap(bytes);
// Retrieve bytes between the position and limit
// (see Putting Bytes into a ByteBuffer)
bytes = new byte[buf.remaining()];
// transfer bytes from this buffer into the given destination array
buf.get(bytes, 0, bytes.length);
// Retrieve all bytes in the buffer
buf.clear();
bytes = new byte[buf.capacity()];
// transfer bytes from this buffer into the given destination array
buf.get(bytes, 0, bytes.length);
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