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• http://opencsv.sourceforge.net/: opencsv is a very simple csv (comma-separated values) parser library for Java. It was developed because all of current csv parsers I've come across don't have commercial-friendly licenses.

http://ostermiller.org/convert_java_outputstream_inputstream.html

Method 1: Buffer the data using a byte array

  ByteArrayOutputStream out = new ByteArrayOutputStream();
  class1.putDataOnOutputStream(out);
  class2.processDataFromInputStream(
    new ByteArrayInputStream(out.toByteArray())
  );

Method 2: Use pipes

PipedInputStream in = new PipedInputStream();
  PipedOutputStream out = new PipedOutputStream(in);
  new Thread(
    new Runnable(){
      public void run(){
        class1.putDataOnOutputStream(out);
      }
    }
  ).start();
  class2.processDataFromInputStream(in);

Method 3: Use Circular Buffers

  // Multiple Threaded Example of a Circular Buffer
 
  CircularByteBuffer cbb = new CircularByteBuffer();
  new Thread(
    new Runnable(){
      public void run(){
        class1.putDataOnOutputStream(cbb.getOutputStream());
      }
    }
  ).start();
  class2.processDataFromInputStream(cbb.getInputStream());

  // Single Threaded Example of a Circular Buffer
 
  // buffer all data in a circular buffer of infinite size
  CircularByteBuffer cbb = new CircularByteBuffer(CircularByteBuffer.INFINITE_SIZE);
  class1.putDataOnOutputStream(cbb.getOutputStream());
  class2.processDataFromInputStream(cbb.getInputStream());