static int firstDigit ( int n ) {
  int digits = ( int ) ( Math . log10 ( n ) ) ;
  n = ( int ) ( n / ( int ) ( Math . pow ( 10 , digits ) ) ) ;
  return n ;
}

static int firstDigit ( int n ) { int digits = ( int ) ( Math . log10 ( n ) ) ; n = ( int ) ( n / ( int ) ( Math . pow ( 10 , digits ) ) ) ; return 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: (cast_expression type: (integral_type) value: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))))) (expression_statement (assignment_expression left: (identifier) right: (cast_expression type: (integral_type) value: (parenthesized_expression (binary_expression left: (identifier) right: (cast_expression type: (integral_type) value: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (identifier)))))))))) (return_statement (identifier))))