java写一个飞机航线路线图

要实现飞机航线路线图，可以使用 Java Swing 绘制图形界面，用 Graphics2D 绘制航线和标注，下面是一个简单的示例代码：

import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.util.ArrayList;
import java.util.List;

public class FlightMap extends JPanel {
    private List<FlightRoute> routeList;

    public FlightMap(List<FlightRoute> routeList) {
        this.routeList = routeList;
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        // 绘制背景
        g2d.setColor(Color.WHITE);
        g2d.fillRect(0, 0, getWidth(), getHeight());

        // 绘制航线
        g2d.setColor(Color.BLUE);
        for (FlightRoute route : routeList) {
            int startX = route.getStartX();
            int startY = route.getStartY();
            int endX = route.getEndX();
            int endY = route.getEndY();
            g2d.drawLine(startX, startY, endX, endY);
        }

        // 绘制标注
        g2d.setColor(Color.BLACK);
        for (FlightRoute route : routeList) {
            int labelX = (route.getStartX() + route.getEndX()) / 2;
            int labelY = (route.getStartY() + route.getEndY()) / 2;
            g2d.drawString(route.getRouteName(), labelX, labelY);
        }

        g2d.dispose();
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(800, 600);
    }

    public static void main(String[] args) {
        // 构造航线列表
        List<FlightRoute> routeList = new ArrayList<>();
        routeList.add(new FlightRoute("Beijing", "Shanghai", 100, 100, 400, 100));
        routeList.add(new FlightRoute("Shanghai", "Guangzhou", 400, 100, 700, 300));
        routeList.add(new FlightRoute("Guangzhou", "Shenzhen", 700, 300, 500, 500));
        routeList.add(new FlightRoute("Shenzhen", "Hong Kong", 500, 500, 300, 400));

        // 绘制航线图
        FlightMap map = new FlightMap(routeList);
        JFrame frame = new JFrame("Flight Map");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(map);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

class FlightRoute {
    private String startCity;
    private String endCity;
    private int startX;
    private int startY;
    private int endX;
    private int endY;

    public FlightRoute(String startCity, String endCity, int startX, int startY, int endX, int endY) {
        this.startCity = startCity;
        this.endCity = endCity;
        this.startX = startX;
        this.startY = startY;
        this.endX = endX;
        this.endY = endY;
    }

    public String getRouteName() {
        return startCity + " - " + endCity;
    }

    public int getStartX() {
        return startX;
    }

    public int getStartY() {
        return startY;
    }

    public int getEndX() {
        return endX;
    }

    public int getEndY() {
        return endY;
    }
}

在这个示例中，我们定义了一个 `FlightRoute` 类来表示航线信息，包括起点城市、终点城市和起点、终点坐标。我们还定义了一个 `FlightMap` 类来绘制航线图。在 `paintComponent` 方法中，我们首先绘制背景，然后绘制航线和标注。在 `main` 方法中，我们构造了一个航线列表 `routeList`，然后创建了一个 `FlightMap` 实例并将其添加到 `JFrame` 中，最后显示 `JFrame` 窗口。