ByteBuffer: flip() : ByteBuffer « java.nio « Java by API

1. Java by API
2. java.nio
3. ByteBuffer

ByteBuffer: flip()

   
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class MainClass {
  public static void main(String[] args) throws Exception {
    String fromFileName = args[0];
    String toFileName = args[1];
    FileChannel in = new FileInputStream(fromFileName).getChannel();
    FileChannel out = new FileOutputStream(toFileName).getChannel();

    ByteBuffer buff = ByteBuffer.allocate(32 * 1024);

    while (in.read(buff) > 0) {
      buff.flip();
      out.write(buff);
      buff.clear();
    }

    in.close();
    out.close();
  }
}

           
         
    
    
  

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