Combining two unicode characters

[PriyaS]

I want to combine to unicode characters into a single representation form.eg to combine '/u0D15' and '/u0D3E'.

i am using the icu library for this.
here prev is a consonant character and current character is a vowel so i have to combine together.
{code}
 char[] newChar={c,(char)prev };
  String newStr=newChar.toString();
   String comStr=Normalizer.compose(newStr,true );

{code}
But this method doesnt work...Can any one suggest me some method for doing the same.Thanks.