question: public static final String makeJavaIdentifier ( String identifier ) { StringBuilder modifiedIdentifier = new StringBuilder ( identifier . length ( ) ) ; if ( ! Character . isJavaIdentifierStart ( identifier . charAt ( 0 ) ) ) { modifiedIdentifier . append ( '_' ) ; } for ( int i = 0 ; i < identifier . length ( ) ; i ++ ) { char ch = identifier . charAt ( i ) ; if ( Character . isJavaIdentifierPart ( ch ) && ch != '_' ) { modifiedIdentifier . append ( ch ) ; } else if ( ch == '.' ) { modifiedIdentifier . append ( '_' ) ; } else { modifiedIdentifier . append ( mangleChar ( ch ) ) ; } } if ( isJavaKeyword ( modifiedIdentifier . toString ( ) ) ) { modifiedIdentifier . append ( '_' ) ; } return modifiedIdentifier . toString ( ) ; }
target:  Converts the given identifier to a legal Java identifier