question: public static String RTFEnc ( String s ) { int ln = s . length ( ) ; int firstEscIdx = - 1 ; int lastEscIdx = 0 ; int plusOutLn = 0 ; for ( int i = 0 ; i < ln ; i ++ ) { char c = s . charAt ( i ) ; if ( c == '{' || c == '}' || c == '\\' ) { if ( firstEscIdx == - 1 ) { firstEscIdx = i ; } lastEscIdx = i ; plusOutLn ++ ; } } if ( firstEscIdx == - 1 ) { return s ; } else { char [ ] esced = new char [ ln + plusOutLn ] ; if ( firstEscIdx != 0 ) { s . getChars ( 0 , firstEscIdx , esced , 0 ) ; } int dst = firstEscIdx ; for ( int i = firstEscIdx ; i <= lastEscIdx ; i ++ ) { char c = s . charAt ( i ) ; if ( c == '{' || c == '}' || c == '\\' ) { esced [ dst ++ ] = '\\' ; } esced [ dst ++ ] = c ; } if ( lastEscIdx != ln - 1 ) { s . getChars ( lastEscIdx + 1 , ln , esced , dst ) ; } return String . valueOf ( esced ) ; } }
target:  Rich Text Format encoding (does not replace line breaks). Escapes all '\' '{' '}'.