java - 创建两个 BufferedReader 会关闭输入流吗？

Question

所以我写了这两个方法:

    public Player readPlayerData() {
        Player player = new Player();
        try(BufferedReader br = new BufferedReader(new InputStreamReader(System.in))){
            System.out.println("What is your name?");
            player.setName(br.readLine());
            System.out.println("How much money do you have?");
            player.setBalance(BigDecimal.valueOf(Double.parseDouble(br.readLine())));
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println(player);
        return player;
    }

    public Currency readPlayerCurrency() {
        Currency currency = null;
        try(BufferedReader br2 = new BufferedReader(new InputStreamReader(System.in))){
            System.out.println("What is your currency?");
            currency = Currency.valueOf(br2.readLine());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println(currency);
        return currency;
    }

当我一次调用一个时，它们会按预期工作，但是当我依次调用它们时，我会得到一个 java.io.IOException:流已关闭。尝试使用资源是否会以某种方式关闭 System.in 输入流，或者我是否误解了它的工作原理？

Answer 1

Does try with resources close the System.in input stream

是的，确实如此。您不应关闭 System.in 输入流。

参见:

• Why don't we close System.out Stream after using it?