static void quickSort ( int [ ] arr , int low , int high ) {
  if ( low < high ) {
    int pi = partition ( arr , low , high ) ;
    quickSort ( arr , low , pi ) ;
    quickSort ( arr , pi + 1 , high ) ;
  }
}

static void quickSort ( int [ ] arr , int low , int high ) { if ( low < high ) { int pi = partition ( arr , low , high ) ; quickSort ( arr , low , pi ) ; quickSort ( arr , pi + 1 , high ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier) (identifier))))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier) (identifier)))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier))))))))