static void printUnion ( int arr1 [ ] , int arr2 [ ] ) {
  HashSet < Integer > hs = new HashSet < > ( ) ;
  for ( int i = 0 ;
  i < arr1 . length ;
  i ++ ) hs . add ( arr1 [ i ] ) ;
  for ( int i = 0 ;
  i < arr2 . length ;
  i ++ ) hs . add ( arr2 [ i ] ) ;
  System . out . println ( hs ) ;
}

static void printUnion ( int arr1 [ ] , int arr2 [ ] ) { HashSet < Integer > hs = new HashSet < > ( ) ; for ( int i = 0 ; i < arr1 . length ; i ++ ) hs . add ( arr1 [ i ] ) ; for ( int i = 0 ; i < arr2 . length ; i ++ ) hs . add ( arr2 [ i ] ) ; System . out . println ( hs ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions))) body: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) (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 (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))