Translating DNA to protein using biojava

I am new to biojava and am trying to convert a user inputted DNA sequence and get the protein sequence as the output. Below is the code that I have so far.

    import java.util.Scanner;
    import org.biojava.bio.seq.DNATools;
    import org.biojava.bio.seq.ProteinTools;
    import org.biojava.bio.seq.RNATools;
    import org.biojava.bio.symbol.IllegalSymbolException;
    import org.biojava.bio.symbol.SymbolList;

    public class translation {

     public static void main(String[] args) { 
         System.out.println("Please enter a DNA sequence: ");
         Scanner input = new Scanner(System.in);
         String input1 = input.nextLine();

         SymbolList dna = DNATools.createDNA(input1);

         SymbolList rna = RNATools.createRNA(dna);


        SymbolList aa = ProteinTools.createProtein(rna);  
       }  
           catch (IllegalSymbolException ex) {  

         System.out.println("The protein is: " aa);
       }  

     }

  }