question: public static boolean isJavaValidName ( String str ) { if ( str . isEmpty ( ) ) return false ; if ( javaKeys . contains ( str ) ) return false ; char first = str . charAt ( 0 ) ; if ( isValidNameStartChar ( first ) ) { for ( int i = 1 ; i < str . length ( ) ; ++ i ) { char c = str . charAt ( i ) ; if ( ! isValidNameChar ( c ) ) return false ; } return true ; } else { return false ; } }
target:  check whether the given string can be a valid java name