Java中的点和段

// Point类
public class Point {
    private double x;
    private double y;

    public Point(double x, double y) {
        this.x = x;
        this.y = y;
    }

    public double getX() {
        return x;
    }

    public double getY() {
        return y;
    }

    // 计算两点之间的距离
    public double distanceTo(Point other) {
        double dx = this.x - other.x;
        double dy = this.y - other.y;
        return Math.sqrt(dx * dx + dy * dy);
    }
}

// LineSegment类
public class LineSegment {
    private Point start;
    private Point end;

    public LineSegment(Point start, Point end) {
        this.start = start;
        this.end = end;
    }

    public double getLength() {
        return start.distanceTo(end);
    }
}

// 主程序
public class Main {
    public static void main(String[] args) {
        Point p1 = new Point(0, 0);
        Point p2 = new Point(3, 4);
        LineSegment line = new LineSegment(p1, p2);
        System.out.println("线段长度: " + line.getLength());
    }
}