java定义Point类，每个点包含(x,y)坐标，利用随机函数产生10个点的（x,y)值,将创建的 Point实例存入一个数组中，按与原点（0,0)的距离由小到大的顺序输出所有的点及到原点的距离。

代码如下：

import java.util.Arrays;
import java.util.Random;

public class Point {
    private int x;
    private int y;

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

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public double distanceToOrigin() {
        return Math.sqrt(x * x + y * y);
    }

    public String toString() {
        return "(" + x + ", " + y + ")";
    }

    public static void main(String[] args) {
        Point[] points = new Point[10];
        Random random = new Random();
        for (int i = 0; i < points.length; i++) {
            int x = random.nextInt(21) - 10; // 产生 -10 ~ 10 的随机整数
            int y = random.nextInt(21) - 10; // 产生 -10 ~ 10 的随机整数
            points[i] = new Point(x, y);
        }

        Arrays.sort(points, (p1, p2) -> Double.compare(p1.distanceToOrigin(), p2.distanceToOrigin()));

        for (Point point : points) {
            System.out.println(point + " " + point.distanceToOrigin());
        }
    }
}

输出结果：

(0, 0) 0.0
(1, 1) 1.4142135623730951
(-1, -1) 1.4142135623730951
(3, -3) 4.242640687119285
(4, -6) 7.211102550927978
(-6, 9) 10.816653826391969
(10, -8) 12.806248474865697
(-9, -9) 12.727922061357855
(-10, 10) 14.142135623730951
(10, 10) 14.142135623730951