code: public String printDSSP() {
  
  		StringBuffer buf = new StringBuffer();
  		String nl = System.getProperty("line.separator");
  
  		//Header Line
  		buf.append("==== Secondary Structure Definition by BioJava"
  				+ " DSSP implementation, Version October 2015 ===="+nl);
  
  		//First line with column definition
  		buf.append("  #  RESIDUE AA STRUCTURE BP1 BP2  ACC     "
  				+ "N-H-->O    O-->H-N    N-H-->O    O-->H-N    "
  				+ "TCO  KAPPA ALPHA  PHI    PSI    "
  				+ "X-CA   Y-CA   Z-CA ");
  
  		for (int i =0 ; i < groups.length ;i++){
  			buf.append(nl);
  			SecStrucState ss = getSecStrucState(i);
  			buf.append(ss.printDSSPline(i));
  		}
  
  		return buf.toString();
  	}
docs: Generate a DSSP file format ouput String of this SS prediction.
  @return String in DSSP output file format