在上述CustomOutputStream中如何做到让textArea按照时间顺序一行一行输出

你可以在CustomOutputStream中记录每一行输出的时间戳，然后在输出文本到textArea时，按照时间戳排序输出每一行文本。具体实现可以将每一行文本和时间戳封装成一个对象，并将这些对象存储在一个List中，然后对List按照时间戳排序，最后逐行输出文本到textArea中。以下是示例代码：

public class CustomOutputStream extends OutputStream {
    private JTextArea textArea;
    private List<LogEntry> logEntries;

    public CustomOutputStream(JTextArea textArea) {
        this.textArea = textArea;
        this.logEntries = new ArrayList<>();
    }

    @Override
    public void write(int b) throws IOException {
        // convert the int to byte array
        byte[] bytes = new byte[1];
        bytes[0] = (byte) (b & 0xFF);
        // output the byte array
        write(bytes, 0, 1);
    }

    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        String text = new String(b, off, len);
        // record the log entry with the current timestamp
        logEntries.add(new LogEntry(System.currentTimeMillis(), text));
        // update the text area with the sorted log entries
        updateTextArea();
    }

    private void updateTextArea() {
        // sort the log entries by timestamp
        Collections.sort(logEntries);
        // clear the text area
        textArea.setText("");
        // output the sorted log entries to the text area
        for (LogEntry entry : logEntries) {
            textArea.append(entry.text);
        }
    }

    private static class LogEntry implements Comparable<LogEntry> {
        private long timestamp;
        private String text;

        public LogEntry(long timestamp, String text) {
            this.timestamp = timestamp;
            this.text = text;
        }

        @Override
        public int compareTo(LogEntry o) {
            return Long.compare(this.timestamp, o.timestamp);
        }
    }
}