用java写控制流水灯的定时装置，界面可以设定定时时间

好的，这里为您提供一个Java程序，用于控制流水灯的定时装置，并且界面可以设定定时时间。

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Timer;

public class FlowingLights extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private static final int WIDTH = 400;
    private static final int HEIGHT = 200;
    private static final int DELAY = 1000;
    private static final int NUM_LIGHTS = 3;
    private static final Color[] COLORS = { Color.RED, Color.GREEN, Color.BLUE };
    private JLabel[] lights;
    private Timer timer;
    private int currentLight = 0;
    private boolean isRunning = false;
    private int duration = 0;
    private JTextField durationField;

    public FlowingLights() {
        super("Flowing Lights");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(new Dimension(WIDTH, HEIGHT));
        setResizable(false);
        setLocationRelativeTo(null);

        JPanel contentPane = new JPanel();
        contentPane.setLayout(new BorderLayout());

        JPanel lightsPanel = new JPanel();
        lightsPanel.setPreferredSize(new Dimension(400, 100));
        lightsPanel.setLayout(new BorderLayout());

        lights = new JLabel[NUM_LIGHTS];
        for (int i = 0; i < NUM_LIGHTS; i++) {
            lights[i] = new JLabel();
            lights[i].setPreferredSize(new Dimension(50, 50));
            lights[i].setOpaque(true);
            lights[i].setBackground(COLORS[i]);
            lightsPanel.add(lights[i], i == 0 ? BorderLayout.WEST : i == 1 ? BorderLayout.CENTER : BorderLayout.EAST);
        }

        JPanel buttonPanel = new JPanel();
        buttonPanel.setPreferredSize(new Dimension(400, 50));

        JButton timerButton = new JButton("定时");
        timerButton.setFont(new Font("宋体", Font.PLAIN, 24));
        timerButton.addActionListener(this);

        JLabel durationLabel = new JLabel("定时时间(秒)：");
        durationLabel.setFont(new Font("宋体", Font.PLAIN, 20));
        durationField = new JTextField(10);
        durationField.setFont(new Font("宋体", Font.PLAIN, 20));

        buttonPanel.add(durationLabel);
        buttonPanel.add(durationField);
        buttonPanel.add(timerButton);

        contentPane.add(lightsPanel, BorderLayout.CENTER);
        contentPane.add(buttonPanel, BorderLayout.SOUTH);

        setContentPane(contentPane);
        setVisible(true);
    }

    public void start() {
        isRunning = true;
        timer = new Timer(DELAY, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lights[currentLight].setBackground(COLORS[currentLight]);
                currentLight = (currentLight + 1) % NUM_LIGHTS;
                lights[currentLight].setBackground(Color.WHITE);
                duration--;
                if (duration == 0) {
                    stop();
                }
            }
        });
        timer.start();
    }

    public void stop() {
        isRunning = false;
        timer.stop();
        for (int i = 0; i < NUM_LIGHTS; i++) {
            lights[i].setBackground(COLORS[i]);
        }
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (isRunning) {
            stop();
        } else {
            String durationStr = durationField.getText();
            if (durationStr.isEmpty()) {
                return;
            }
            duration = Integer.parseInt(durationStr);
            start();
        }
    }

    public static void main(String[] args) {
        new FlowingLights();
    }
}

这个程序中，我们添加了一个文本框，用于让用户输入定时时间。当用户点击“定时”按钮时，程序会读取文本框中的值，并开启一个计时器。每当计时器触发一次，程序会切换流水灯的状态，并且将定时时间减少一秒钟。当定时时间为零时，程序会停止运行。