import  org.apache.commons.codec.binary.Base64;
 public   class  TestClass {
     public  Base64 bs64 =  new  Base64();
    String st1;
     public   static   void  main(String[] args){
    TestClass tC =  new  TestClass();
    String st2 = "test9994";
    tC.outInfo("test9994");
    tC.outInfo(st2);
    }
  private   void  outInfo(String st){
   System.out.println("st = "+st+". "+bs64.encode(st.trim().getBytes()));
 }
}

....
  private   void  outInfo(String st){
   System.out.println("st = "+st+". "+  new  String(bs64.encode(st.trim().getBytes())));
 }