private static int [ ] convolve ( int [ ] a , int [ ] b ) {
  int [ ] c = new int [ a . length + b . length - 1 ] ;
  for ( int i = 0 ;
  i < a . length ;
  i ++ ) {
    for ( int j = 0 ;
    j < b . length ;
    j ++ ) c [ i + j ] += a [ i ] * b [ j ] ;
  }
  return c ;
}

private static int [ ] convolve ( int [ ] a , int [ ] b ) { int [ ] c = new int [ a . length + b . length - 1 ] ; for ( int i = 0 ; i < a . length ; i ++ ) { for ( int j = 0 ; j < b . length ; j ++ ) c [ i + j ] += a [ i ] * b [ j ] ; } return c ; }
(method_declaration (modifiers) type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (field_access object: (identifier) field: (identifier))) right: (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: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (identifier))) right: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier)))))))) (return_statement (identifier))))