Java、使用ArrayList

package pack1;

import javafx.scene.shape.Circle;

import java.awt.*;
import java.util.ArrayList;
import java.util.Date;

public class UsingArrayList {
    public static void main(String[] args) {
        ArrayList<Object> list = new ArrayList<>();
        list.add(new Date());
        list.add(new Circle());
        list.add(new Point());

        for (Object object: list)
            System.out.println(object + "\n");
    }
}