static boolean isVowel ( char ch ) {
  ch = Character . toUpperCase ( ch ) ;
  return ( ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U' ) ;
}

static boolean isVowel ( char ch ) { ch = Character . toUpperCase ( ch ) ; return ( ch == ' A ' || ch == ' E ' || ch == ' I ' || ch == ' O ' || ch == ' U ' ) ; }
(method_declaration (modifiers) type: (boolean_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (return_statement (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (character_literal)) right: (binary_expression left: (identifier) right: (character_literal))) right: (binary_expression left: (identifier) right: (character_literal))) right: (binary_expression left: (identifier) right: (character_literal))) right: (binary_expression left: (identifier) right: (character_literal)))))))