Java encoding convert Unicode to Utf-8

Privatestring Decodeunicode (String thestring) {CharAchar; intLen =thestring.length (); StringBuffer Outbuffer=NewStringBuffer (len);  for(intx = 0; X <Len;) {Achar= Thestring.charat (x + +); if(Achar = = ' \ \ ') {Achar= Thestring.charat (x + +); if(Achar = = ' U ') {                    //Read the XXXX                    intValue = 0;  for(inti = 0; I < 4; i++) {Achar= Thestring.charat (x + +); Switch(Achar) { Case' 0 ':                         Case' 1 ':                         Case' 2 ':                         Case' 3 ':                         Case' 4 ':                         Case' 5 ':                         Case' 6 ':                         Case' 7 ':                         Case' 8 ':                         Case' 9 ': Value= (value << 4) + Achar-' 0 ';  Break;  CaseA:                         Case' B ':                         CaseC:                         Case' d ':                         CaseE:                         Case' F ': Value= (value << 4) + + Achar-' a ';  Break;  CaseA:                         CaseB:                         CaseC:                         CaseD:                         CaseE:                         CaseF: Value= (value << 4) + + Achar-' A ';  Break; default:                            Throw NewIllegalArgumentException ("Malformed \\UXXXX encoding."); }} outbuffer.append ((Char) value); } Else {                    if(Achar = = ' t ') Achar= ' \ t '; Else if(Achar = = ' R ') Achar= ' \ r '; Else if(Achar = = ' n ') Achar= ' \ n '; Else if(Achar = = ' F ') Achar= ' \f ';                Outbuffer.append (Achar); }            } Elseoutbuffer.append (Achar); }        returnoutbuffer.tostring (); }

Java encoding convert Unicode to Utf-8