allNames.java

if( keyCode == ENTER ){
  if( focusElement == rect2 ) .... 
  if( focusElement == rect4 ) ... 

  // afaik the "name" button is rect 1, in which case we just loop through all lines and print the names
  if( focusElement == rect1 ){
    for( int i =0; i < lines.length; i++ ){
      println( lines[i].substring( NAME_START, NAME_END ) ); 
    }
  }
}