static int binaryToDecimal ( String n ) {
  String num = n ;
  int dec_value = 0 ;
  int base = 1 ;
  int len = num . length ( ) ;
  for ( int i = len - 1 ;
  i >= 0 ;
  i -- ) {
    if ( num . charAt ( i ) == '1' ) dec_value += base ;
    base = base * 2 ;
  }
  return dec_value ;
}

static int binaryToDecimal ( String n ) { String num = n ; int dec_value = 0 ; int base = 1 ; int len = num . length ( ) ; for ( int i = len - 1 ; i >= 0 ; i -- ) { if ( num . charAt ( i ) == '1' ) dec_value += base ; base = base * 2 ; } return dec_value ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (identifier))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (return_statement (identifier))))