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// : c12:UsingBuffers.java
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
public class UsingBuffers {
private static void symmetricScramble(CharBuffer buffer) {
while (buffer.hasRemaining()) {
buffer.mark();
char c1 = buffer.get();
char c2 = buffer.get();
buffer.reset();
buffer.put(c2).put(c1);
}
}
public static void main(String[] args) {
char[] data = "UsingBuffers".toCharArray();
ByteBuffer bb = ByteBuffer.allocate(data.length * 2);
CharBuffer cb = bb.asCharBuffer();
cb.put(data);
System.out.println(cb.rewind());
symmetricScramble(cb);
System.out.println(cb.rewind());
symmetricScramble(cb);
System.out.println(cb.rewind());
}
} ///:~
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