36 lines
914 B
Java
36 lines
914 B
Java
// newio/UsingBuffers.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.nio.*;
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public class UsingBuffers {
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private static
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void symmetricScramble(CharBuffer buffer) {
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while(buffer.hasRemaining()) {
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buffer.mark();
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char c1 = buffer.get();
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char c2 = buffer.get();
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buffer.reset();
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buffer.put(c2).put(c1);
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}
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}
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public static void main(String[] args) {
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char[] data = "UsingBuffers".toCharArray();
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ByteBuffer bb =
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ByteBuffer.allocate(data.length * 2);
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CharBuffer cb = bb.asCharBuffer();
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cb.put(data);
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System.out.println(cb.rewind());
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symmetricScramble(cb);
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System.out.println(cb.rewind());
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symmetricScramble(cb);
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System.out.println(cb.rewind());
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}
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}
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/* Output:
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UsingBuffers
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sUniBgfuefsr
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UsingBuffers
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*/
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