欢迎大家，
这是我在这个网站上的第一篇文章，我对java也很陌生，所以对我很轻松：）
我正在为我的大学开展一个项目，任务是： ＆＃34;设计＆amp;基于链接到swing的类构建Java应用程序 （GUI）应用程序。 ＆＃34;
所以我决定购买一个购物应用程序，允许您选择几个游戏，将它们添加到购物车，然后显示购物车/编辑/删除项目等。
我在使用JButton将项目添加到购物车时遇到问题。这是我的代码：
驱动程序：
import java.awt.*;
import java.util.*;
import java.text.*;
import java.math.*;
import javax.swing.*;
import java.awt.event.*;
public class MainShop extends JFrame implements ActionListener, WindowListener {
private Container content;
private JLabel l1 = new JLabel ("Welcome to my Shop");
private JLabel l2 = new JLabel("You want to browse for great games?");
private JLabel l3 = new JLabel ("Choose one of the following 2 platforms: ");
private JLabel l4 = new JLabel ("XBox has no good games. Try PS4 :) ");
private PS4 dialog1 = null ;
private XBox dialog2 = null;
private JButton b1 = new JButton("PS4");
private JButton b2 = new JButton("XBox");
public MainShop (String str) {
super(str);
content = getContentPane();
content.setLayout(new GridLayout(2,2));
content.add(l1);
content.add(l2);
content.add(l3);
content.add(l4);
l4.setVisible(false);
content.add(b1);
b1.addActionListener(this);
content.add(b2);
b2.addActionListener(this);
setSize(800, 150);
content.setBackground(Color.white);
this.addWindowListener(this);
setVisible(true);
}
public void actionPerformed (ActionEvent e) {
Object target = e.getSource();
if (target == b2) {
l4.setVisible(true);
}
if (target == b1) {
l4.setVisible(false);
this.setVisible(false);
new PS4(this, "PS4");
}
}
public void windowActivated(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowClosing(WindowEvent e){System.exit(0);}
public void windowDeactivated(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowOpened(WindowEvent e){}
}
MainShop：
import java.awt.*;
import java.util.*;
import java.text.*;
import java.math.*;
import javax.swing.*;
import java.awt.event.*;
class PS4 extends JFrame implements ActionListener, WindowListener{
private JPanel Center = new JPanel();
private JPanel South = new JPanel ();
private JPanel North = new JPanel ();
private JPanel South1 = new JPanel();
private JPanel South2 = new JPanel();
private JPanel Center1 = new JPanel();
private JPanel Center2 = new JPanel ();
private JPanel Center3 = new JPanel ();
private JLabel n1 = new JLabel ("PS4 Games");
private JLabel c1desc = new JLabel ("Name");
private JLabel li1 = new JLabel ("Like it?");
private JLabel c2desc = new JLabel ("Description");
private JLabel c3desc = new JLabel ("Price");
private JButton basket = new JButton ("Proceed to checkout");
private JButton CB = new JButton("Go Back");
private JLabel g1 = new JLabel("Uncharted");
private JButton b1 = new JButton("Add to Basket");
private JLabel d1 = new JLabel (" Action-adventure ");
private JLabel p1 = new JLabel ("59.99€");
private JLabel g2 = new JLabel("Call of Duty");
private JButton b2 = new JButton("Add to Basket");
private JLabel d2 = new JLabel (" First Person Shooter ");
private JLabel p2 = new JLabel ("69.99€");
private JLabel g3 = new JLabel("Fifa 18");
private JButton b3 = new JButton("Add to Basket");
private JLabel d3 = new JLabel (" Sport ");
private JLabel p3 = new JLabel ("69.99€");
private JLabel g4 = new JLabel("Skyrim");
private JButton b4 = new JButton("Add to Basket");
private JLabel d4 = new JLabel (" Open World RPG ");
private JLabel p4 = new JLabel ("49.99€");
private Container content;
private JFrame parent;
public PS4 (JFrame p, String Str) {
super(Str);
parent = p;
getContentPane().add(North, BorderLayout.NORTH);
North.add(n1);
getContentPane().add(Center, BorderLayout.CENTER);
Center.setLayout(new GridLayout(5,4));
Center.add(c1desc);
Center.add(c2desc);
Center.add(c3desc);
Center.add(li1);
Center.add(g1);
Center.add(d1);
Center.add(p1);
Center.add(b1); b1.addActionListener(this);
Center.add(g2);
Center.add(d2);
Center.add(p2);
Center.add(b2); b2.addActionListener(this);
Center.add(g3);
Center.add(d3);
Center.add(p3);
Center.add(b3); b3.addActionListener(this);
Center.add(g4);
Center.add(d4);
Center.add(p4);
Center.add(b4); b4.addActionListener(this);
getContentPane().add(South, BorderLayout.SOUTH);
South.setLayout(new GridLayout(1,2));
South.add(South1);
South.add(South2);
South1.add(CB);
CB.addActionListener(this);
South2.add(basket);
basket.addActionListener(this);
setSize(600,400);
setVisible(true);
this.addWindowListener(this);
}
public void actionPerformed(ActionEvent e) {
Object target = e.getSource();
if (target == b1) {
// THIS IS WHERE I STRUGGLE
}
if (target == b2) {
}
if (target == b3) {
}
if(target == b4) {
}
if(target==CB) {
this.setVisible(false);
parent.setVisible(true);;
}
if (target == basket) {
this.setVisible(false);
new Checkout(this, "");
}
}
public void windowActivated(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowClosing(WindowEvent e){System.exit(0);}
public void windowDeactivated(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowOpened(WindowEvent e){}
}
PS4类
{{1}}
那么如何通过点击＆＃34;添加到购物车＆＃34;添加我想要的新课程？ JButton的？ 最糟糕的是，我们必须在2周内展示它，它是在星期五东部休息前的最后一堂课上给我们的。因此，在没有我们的讲师帮助的情况下，我们有两周的时间来完成它。 另外，请不要担心代码结构/布局等，因为这将在最后完成。现在我试图让代码正常工作。
现在，我知道它的帖子很长，所以任何建议都会受到赞赏 如果有人需要截图，请告诉我，我会添加它们。 谢谢！
答案 0 :(得分：0)
我目前正在打电话，所以这个答案现在很简短，但是如果我回家的话，我可以提供更多帮助。
立即想到两个选项。