JavaでGUI使ったけどJLabelがうまく使えなくて思った通りに表示されない

前提・実現したいこと

JavaでGUI（swing ）を使って、ボタンを押したら、トランプのカードが一枚選ばれるというプログラムを書いています。"〜が選ばれました"という文と、トランプの絵を出そうとしています（簡易的な物ですが）。実行すると、テキストが全部上の方に寄せられて、文の方はいいのですが、トランプの絵が崩れてしまいます。
トランプの絵のパーツが揃って、絵になるようにしたいです。
エラーはありません。

発生している問題・エラーメッセージ

なし

該当のソースコード

Java
1package com.company;
2import javax.swing.*;
3import javax.swing.plaf.basic.BasicOptionPaneUI;
4import java.awt.*;
5import java.awt.event.*;
6import java.util.List;
7import java.util.Random;
8import java.util.ArrayList;
9public class Main {
10
11    public static void main(String[] args) {
12	// write your code here
13        JFrame f = new JFrame("Card Picker");//build JFrame with the title "Card Picker".
14
15        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//set default type of close operation
16        f.setSize(500,400);//set size of the frame
17
18        //Bring the class here
19        PickCard pc = new PickCard();//Build PickCard class as pc
20        //add them
21        f.add(pc, BorderLayout.NORTH);//add pc to the north of the frame
22
23        f.setVisible(true);//make it visible
24    }
25}
26class PickCard extends JPanel {//PickCard class. The set of card number and suit is selected randomly when the button is pressed.
27    static JButton b;//build JButton as b
28    static JLabel l1,l2,l3,l4,l5,l6,l7,l8,l9,l10;//Build JLabel
29    static String card_num;//define the string variable named card_num, which refers to the card number randomly selected
30    static String card_suit;//define the string variable named card_suit, which refers to the suit of the card randomly selected.
31    static String result;//define the string variable named result, which refers to the sentence that appears on the frame
32
33    public PickCard() {
34        b = new JButton("Pick card!");//make a button titled "Pick Card!".
35        b.addActionListener(new ButtonListener());//add ActionListener to a button
36
37
38        l1 = new JLabel(""+result);//this shows the result
39        l2 = new JLabel("┌──────────┐");
40        l3 = new JLabel("│"+card_num+"          │");
41        l4 = new JLabel("│          │");
42        l5 = new JLabel("│          │");
43        l6 = new JLabel("│     "+card_suit+"     │");
44        l7 = new JLabel("│          │");
45        l8 = new JLabel("│          │");
46        l9 = new JLabel("│          "+card_num+"│");
47        l10 = new JLabel("└──────────┘");//these are supposed to be a picture of a card
48
49        this.add(b);
50        this.add(l1);
51        this.add(l2);
52        this.add(l3);
53        this.add(l4);
54        this.add(l5);
55        this.add(l6);
56        this.add(l7);
57        this.add(l8);
58        this.add(l9);
59        this.add(l10T);//add all JLabel. 
60    }
61    class ButtonListener implements ActionListener {
62        public void actionPerformed(ActionEvent event) {//Actions taken once the button is pressed.
63            String[] card_num_list = {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};//Make a list of number
64            String[] card_suit_list = {"\u2660","\u2665","\u2666","\u2663"};//spade, heart, diamond, club. Make a list of suit.
65
66            Random r = new Random();//build Random
67            card_num = card_num_list[r.nextInt(13)];//Number is randomly selected
68            card_suit = card_suit_list[r.nextInt(4)];//Suit is also randomly selected.
69            result = "You have drawn the "+card_num+" of "+card_suit+".";//result, which is a sentence
70            l1.setText(result);
71            l3.setText(card_num);
72            l6.setText(card_suit);
73            l9.setText(card_num);//set Text to the label
74        }
75    }
76}
77
78