redirect inputStream to JTextField

I want to redirect 开发者_StackOverflowthe Standard System input to JTextField, So that a user must type his/her input in JTextField (instead of console.)

I found System.setIn(InputStream istream) for redirecting System.in.

Here is my scratch code where i confused on reading from JTextField - inputJTextField.

 System.setIn(new InputStream() {
     @Override
         public int read() throws IOException {
         //how to read content?
         return Integer.parseInt(inputJTextField.getText());
      }
  });

My Question is how to read content from GUI Component ( like JTextField and Cast it to String and other types after redirecting the input stream?

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If you want to convert arbitrary string to InputStream, then use ByteArrayInputStream.

ByteArrayInputStream stringToInputStream ( final String s )
{
  // Assume your input is in UTF-8
  ByteArrayInputStream result =
    new ByteArrayInputStream( s.getBytes( "UTF-8" ) );

  return result;
}

However, I am not sure that your whole approach of setting your running process'es input stream will work.

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for multilines intput to the Gui would be better to look for JEditorPane or JTextPane, lots of examples on this forum for JEditorPanes ot JTextPanes or here