Java:在循环中睡眠的替代方案?

我需要连续监听串行输入,但NetBeans警告“调用Thread.sleep in loop可能会导致性能问题”

public class SerialIO extends javax.swing.JFrame {
    ...
    class RcvTask extends Thread {
        public void run() {
            try {
                SerInputStream sis = new SerInputStream(serialPort);
                InputStreamReader isr = new InputStreamReader(sis);
                BufferedReader reader = new BufferedReader(isr);
                while (true) {
                    String line = reader.readLine();
                    parse(line);
                    sleep(RX_SLEEP);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    ...