【发布时间】：2022-01-12 03:39:12
【问题描述】：
我有一个带有一个按钮的主 JFrame，当我按下此按钮时，会打开一个 JDialog，其中包含 Json 文件中的一些对象。对于每个对象，我都有一个删除按钮。一切都很好，但是要查看除我删除的这个对象之外的所有对象，我必须关闭 JDialog 并再次打开它。有什么办法可以刷新 JDialog？我发现一个“解决方案”女巫是处置 JDialog 并制作新的，然后将新的设置为可见，但这并不是我真正需要的。我需要在按下按钮后立即看到新的结果。下面的 JFrame myFrame 是主框架不关心它（“我猜”）。 这是我的对话框：
public class MyFavoriteCoctails extends JDialog {
public MyFavoriteCoctails(JFrame myFrame) {
this.myFrame = myFrame;
setLocationRelativeTo(myFrame);
maker();
}
private void maker() {
setModal(true);
setTitle("My Favortie Cocktails");
setResizable(false);
setLayout(new BorderLayout());
JPanel panelOnTop = new JPanel(new BorderLayout());
JLabel favCocktailLabel = new JLabel("My Favorite Cocktails");
favCocktailLabel.setFont(new Font("Sans Serif", Font.PLAIN, 150));
favCocktailLabel.setForeground(Color.red);
panelOnTop.setBorder(BorderFactory.createMatteBorder(5, 5, 5, 5, Color.red));
panelOnTop.add(favCocktailLabel, BorderLayout.CENTER);
panelOnTop.setBackground(Color.white);
this.add(panelOnTop, BorderLayout.NORTH);
JPanel panelForCocktails = new JPanel();
this.add(panelForCocktails, BorderLayout.CENTER);
List<Coctail> list = SingleObject.getfavCoctailList();
int row;
if ((list.size() % 5) != 0) {
row = list.size() / 5 + 1;
} else {
row = list.size() / 5;
}
panelForCocktails.setLayout(new GridLayout(row, 5));
this.add(panelForCocktails, BorderLayout.CENTER);
for (int i = 0; i < list.size(); i++) {
panelForCocktails.add(new CocktailJPanelForFavorites(list.get(i).getId(), list.get(i).getImg(),
list.get(i).getName(), list.get(i), this, myFrame));
}
pack();
}
JFrame myFrame;
} 这是我的 JPanel 女巫，它在每个面板中都有一些来自 json 文件的详细信息。：
public class CocktailJPanelForFavorites extends JPanel {
public CocktailJPanelForFavorites(String id, String img, String name, Coctail coctail, JDialog dialog, JFrame myFrame) {
this.coctail = coctail;
this.myFrame=myFrame;
this.id = id;
this.name = name;
this.img = img;
this.dialog=dialog;
maker();
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public void maker() {
setLayout(new BorderLayout(1, 1));
this.setBackground(Color.white);
this.setBorder(BorderFactory.createMatteBorder(1, 1, 1, 1, Color.black));
JLabel nameLabel = new JLabel(name, SwingConstants.CENTER);
nameLabel.setFont(new Font("Sans Serif", Font.BOLD, 18));
this.add(nameLabel, BorderLayout.NORTH);
JButton deleteFavorite = new JButton("X");
JComboBox comboBox = new JComboBox(Favouritetype.values());
comboBox.setRenderer(new MyComboBoxRenderer("ΚΑΤΗΓΟΡΙΑ"));
comboBox.setSelectedIndex(-1);
;
try {
URL url = new URL(img);
BufferedImage c = ImageIO.read(url);
ImageIcon imageIcon = new ImageIcon(c); // load the image to a imageIcon
Image image = imageIcon.getImage(); // transform it
Image newimg = image.getScaledInstance(200, 200, java.awt.Image.SCALE_SMOOTH); // scale
imageIcon = new ImageIcon(newimg); // transform it back
JLabel jp = new JLabel(imageIcon, JLabel.CENTER);
jp.setBorder(BorderFactory.createMatteBorder(10, 10, 10, 10, Color.white));
jp.addMouseListener(new MouseAdapter(id));
jp.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
add(jp, BorderLayout.CENTER);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JPanel deleteAndCombo = new JPanel(new GridLayout(1, 2));
deleteAndCombo.add(deleteFavorite);
deleteAndCombo.add(comboBox);
add(deleteAndCombo, BorderLayout.SOUTH);
DeleteFavorite act = new DeleteFavorite(coctail, deleteFavorite, dialog, this, myFrame);
deleteFavorite.addActionListener(act);
}
String id, name, img;
Coctail coctail;
JDialog dialog;
JFrame myFrame;
}
这是我的删除按钮的动作监听器（是里面带有“X”的按钮）：
public class DeleteFavorite implements ActionListener {
public DeleteFavorite(Coctail coctail, JButton deleteFavorite, JDialog dialog, JPanel cockPane, JFrame myFrame) {
this.deleteFavorite = deleteFavorite;
this.coctail = coctail;
this.myFrame=myFrame;
this.dialog=dialog;
this.cockPane=cockPane;
}
@Override
public void actionPerformed(ActionEvent e) {
SingleObject obj = SingleObject.getInstance();
List<Coctail> list = SingleObject.getfavCoctailList();
List<Coctail> favcoctailList = list;
int len = favcoctailList.size();
if (favcoctailList != null) {
for (int i = 0; i < len; i++) {
if ((favcoctailList.get(i).getId().toString().trim().equals(coctail.getId().toString().trim()))) {
favcoctailList.remove(i);
break;
}
}
}
System.out.println(favcoctailList);
obj.make(favcoctailList);
dialog.dispose();
MyFavoriteCoctails dialog1 = new MyFavoriteCoctails(myFrame);
dialog1.setVisible(true);
}
JButton deleteFavorite;
Coctail coctail;
JDialog dialog;
JPanel cockPane;
JFrame myFrame;
}
【问题讨论】：
-
来自 Json 文件的一些对象。 - 可能使用
JTable来显示这些对象。然后，当您想要进行更改时，您只需从 TableModel 中添加/删除一行数据。
标签： java json swing jpanel jdialog