static int extractMaximum ( String str ) {
  int num = 0 , res = 0 ;
  for ( int i = 0 ;
  i < str . length ( ) ;
  i ++ ) {
    if ( Character . isDigit ( str . charAt ( i ) ) ) num = num * 10 + ( str . charAt ( i ) - '0' ) ;
    else {
      res = Math . max ( res , num ) ;
      num = 0 ;
    }
  }
  return Math . max ( res , num ) ;
}

static int extractMaximum ( String str ) { int num = 0 , res = 0 ; for ( int i = 0 ; i < str . length ( ) ; i ++ ) { if ( Character . isDigit ( str . charAt ( i ) ) ) num = num * 10 + ( str . charAt ( i ) - '0' ) ; else { res = Math . max ( res , num ) ; num = 0 ; } } return Math . max ( res , num ) ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)))))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))))))) (return_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))))