package io;

import java.nio.*;

import java.util.*;

/**

* RUN:

* javac io/UsingBuffers.java && java io.UsingBuffers

*

* OUTPUT:

* UsingBuffers

* sUniBgfuefsr

* UsingBuffers

*/

public class UsingBuffers {

public 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());

}

}