static int onesComplement ( int n ) {
  int number_of_bits = ( int ) ( Math . floor ( Math . log ( n ) / Math . log ( 2 ) ) ) + 1 ;
  return ( ( 1 << number_of_bits ) - 1 ) ^ n ;
}

static int onesComplement ( int n ) { int number_of_bits = ( int ) ( Math . floor ( Math . log ( n ) / Math . log ( 2 ) ) ) + 1 ; return ( ( 1 << number_of_bits ) - 1 ) ^ n ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (cast_expression type: (integral_type) value: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal)))))))) right: (decimal_integer_literal)))) (return_statement (binary_expression left: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (decimal_integer_literal) right: (identifier))) right: (decimal_integer_literal))) right: (identifier)))))