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| 11. 41. 13. 转换ByteBuffer到CharBuffer |
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import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.CharBuffer;
/**
* Test asCharBuffer view.
*/
public class MainClass {
public static void main(String[] argv) throws Exception {
ByteBuffer byteBuffer = ByteBuffer.allocate(7).order(ByteOrder.BIG_ENDIAN);
CharBuffer charBuffer = byteBuffer.asCharBuffer();
byteBuffer.put(0, (byte) 0);
byteBuffer.put(1, (byte) 'H');
byteBuffer.put(2, (byte) 0);
byteBuffer.put(3, (byte) 'i');
byteBuffer.put(4, (byte) 0);
byteBuffer.put(5, (byte) '!');
byteBuffer.put(6, (byte) 0);
println(byteBuffer);
println(charBuffer);
// now slice it differently
byteBuffer.position(4);
charBuffer = byteBuffer.asCharBuffer();
println(byteBuffer);
println(charBuffer);
}
// Print info about a buffer
private static void println(Buffer buffer) {
System.out.println("pos=" + buffer.position() + ", limit=" + buffer.limit() + ", capacity="
+ buffer.capacity() + ": '" + buffer.toString() + "'");
}
}
/*
*/
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pos=0, limit=7, capacity=7: 'java.nio.HeapByteBuffer[pos=0 lim=7 cap=7]'
pos=0, limit=3, capacity=3: 'Hi!'
pos=4, limit=7, capacity=7: 'java.nio.HeapByteBuffer[pos=4 lim=7 cap=7]'
pos=0, limit=1, capacity=1: '!' |
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