有啥办法可以刷新 JDialog 并重新制作它？
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【中文标题】有啥办法可以刷新 JDialog 并重新制作它？【英文标题】：Is there any way i can refresh a JDialog and remake it?有什么办法可以刷新 JDialog 并重新制作它？ 【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。
【参考方案1】：
您的问题的基本答案是，您的对话/面板需要某种方式来获得“下一个”鸡尾酒。那么您需要做的就是更新新鸡尾酒的详细信息。
实现这一目标的最佳方式是拥有某种“经理”，它负责管理您系统中的所有鸡尾酒。在删除当前鸡尾酒之前，您需要确定列表中鸡尾酒的当前索引，删除鸡尾酒，然后呈现现在占据该位置的鸡尾酒。你也可以使用某种Iterator 来做到这一点，但这有什么好玩的呢。
由于我无法访问您的所有代码（而且您的 UI 代码有些混乱），因此我设计了自己的示例。
下面是“详细信息”窗格，其中显示了有关鸡尾酒的详细信息，并允许用户将其删除。
public class CocktailDetailPane extends JPanel
private JLabel imageLabel;
private JLabel nameLabel;
private CocktailManager cocktailManager;
private Cocktail cocktail;
public CocktailDetailPane(Cocktail cocktail, CocktailManager manager)
this.cocktailManager = manager;
setLayout(new BorderLayout());
imageLabel = new JLabel();
nameLabel = new JLabel();
JPanel contentPane = new JPanel(new GridBagLayout());
contentPane.setBorder(new EmptyBorder(16, 16, 16, 16));
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridheight = GridBagConstraints.REMAINDER;
gbc.anchor = GridBagConstraints.PAGE_START;
gbc.insets = new Insets(4, 4, 4, 4);
contentPane.add(imageLabel, gbc);
gbc = new GridBagConstraints();
gbc.insets = new Insets(4, 4, 4, 4);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.LINE_START;
contentPane.add(nameLabel, gbc);
gbc.gridy++;
contentPane.add(new JLabel("Drink it fast, drink it often"), gbc);
add(contentPane);
setCocktail(cocktail);
JPanel actionPane = new JPanel(new GridBagLayout());
JButton deleteButton = new JButton("Delete");
deleteButton.addActionListener(new ActionListener()
@Override
public void actionPerformed(ActionEvent e)
CocktailManager manager = getCocktailManager();
List<Cocktail> cocktails = manager.getCocktails();
Cocktail cocktail = getCocktail();
int index = cocktails.indexOf(cocktail);
manager.remove(cocktail);
if (cocktails.isEmpty())
JOptionPane.showMessageDialog(CocktailDetailPane.this, "No more cocktails for you", "Empty", JOptionPane.ERROR_MESSAGE);
SwingUtilities.windowForComponent(CocktailDetailPane.this).dispose();
else
if (index >= cocktails.size())
index = 0;
setCocktail(cocktails.get(index));
);
actionPane.add(deleteButton);
add(actionPane, BorderLayout.SOUTH);
protected void setCocktail(Cocktail cocktail)
imageLabel.setIcon(new ImageIcon(cocktail.getImage()));
nameLabel.setText(cocktail.getName());
this.cocktail = cocktail;
public CocktailManager getCocktailManager()
return cocktailManager;
public Cocktail getCocktail()
return cocktail;
您会注意到，我已将CocktailManager 的实例以及Cocktail 的实例传递给了详细信息窗格。
如果当前的Cocktail 被删除，则显示下一个Cocktail（变为当前的），依此类推，直到您没有更多鸡尾酒了。
其中一些可以通过在CocktailManager 本身上使用观察者模式来解耦（因此，当添加或删除鸡尾酒时，相关方可以对其做出反应，但我认为这个概念已经断章取义了问题）。
可运行示例...
因为脱离上下文的代码很难理解，所以我提供了一个可运行的示例...
这个例子利用了依赖注入（对于reference、reference、reference、reference）和“编码到接口”（对于reference和reference）
这将允许您为 CocktailManager 定义您自己的“合同”并根据您的需要定义您自己的实现，但核心概念应该继续有效
您可能还想看看How to Use Lists
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Image;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.imageio.ImageIO;
import javax.swing.AbstractListModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
public class Test
public static void main(String[] args)
new Test();
public Test()
EventQueue.invokeLater(new Runnable()
@Override
public void run()
CocktailManager manager = new DefaultCocktailManager();
JFrame frame = new JFrame();
frame.add(new CocktailListPane(manager));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
);
public interface Cocktail
public String getId();
public Image getImage();
public String getName();
public interface CocktailManager
public List<Cocktail> getCocktails();
public void add(Cocktail coctail);
public void remove(Cocktail coctail);
public class CocktailListPane extends JPanel
private JList<Cocktail> list;
private CocktailManager manager;
public CocktailListPane(CocktailManager manager)
this.manager = manager;
list = new JList<>(new CocktailListModel(manager));
list.setCellRenderer(new CocktailListCellRenderer());
list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
list.setVisibleRowCount(2);
setLayout(new BorderLayout());
add(new JLabel("My Favorite Cocktails"), BorderLayout.NORTH);
add(new JScrollPane(list));
list.addMouseListener(new MouseAdapter()
@Override
public void mouseClicked(MouseEvent e)
if (e.getClickCount() != 2)
return;
int index = list.locationToIndex(e.getPoint());
if (index < 0)
return;
Cocktail cocktail = list.getModel().getElementAt(index);
JDialog dialog = new JDialog(SwingUtilities.windowForComponent(CocktailListPane.this));
dialog.setTitle("All your cocktail belong to us");
dialog.setModal(true);
dialog.add(new CocktailDetailPane(cocktail, getCocktailManager()));
dialog.pack();
dialog.setLocationRelativeTo(CocktailListPane.this);
dialog.setVisible(true);
list.setModel(new CocktailListModel(getCocktailManager()));
);
public CocktailManager getCocktailManager()
return manager;
protected class CocktailListModel extends AbstractListModel<Cocktail>
private CocktailManager manager;
public CocktailListModel(CocktailManager manager)
this.manager = manager;
@Override
public int getSize()
return manager.getCocktails().size();
@Override
public Cocktail getElementAt(int index)
return manager.getCocktails().get(index);
protected class CocktailListCellRenderer extends DefaultListCellRenderer
@Override
public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus)
if (value instanceof Cocktail)
Cocktail cocktail = (Cocktail) value;
value = cocktail.getName();
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
setIcon(new ImageIcon(cocktail.getImage()));
return this;
return super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
public class CocktailDetailPane extends JPanel
private JLabel imageLabel;
private JLabel nameLabel;
private CocktailManager cocktailManager;
private Cocktail cocktail;
public CocktailDetailPane(Cocktail cocktail, CocktailManager manager)
this.cocktailManager = manager;
setLayout(new BorderLayout());
imageLabel = new JLabel();
nameLabel = new JLabel();
JPanel contentPane = new JPanel(new GridBagLayout());
contentPane.setBorder(new EmptyBorder(16, 16, 16, 16));
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridheight = GridBagConstraints.REMAINDER;
gbc.anchor = GridBagConstraints.PAGE_START;
gbc.insets = new Insets(4, 4, 4, 4);
contentPane.add(imageLabel, gbc);
gbc = new GridBagConstraints();
gbc.insets = new Insets(4, 4, 4, 4);
gbc.gridx = 1;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.LINE_START;
contentPane.add(nameLabel, gbc);
gbc.gridy++;
contentPane.add(new JLabel("Drink it fast, drink it often"), gbc);
add(contentPane);
setCocktail(cocktail);
JPanel actionPane = new JPanel(new GridBagLayout());
JButton deleteButton = new JButton("Delete");
deleteButton.addActionListener(new ActionListener()
@Override
public void actionPerformed(ActionEvent e)
CocktailManager manager = getCocktailManager();
List<Cocktail> cocktails = manager.getCocktails();
Cocktail cocktail = getCocktail();
int index = cocktails.indexOf(cocktail);
manager.remove(cocktail);
if (cocktails.isEmpty())
JOptionPane.showMessageDialog(CocktailDetailPane.this, "No more cocktails for you", "Empty", JOptionPane.ERROR_MESSAGE);
SwingUtilities.windowForComponent(CocktailDetailPane.this).dispose();
else
if (index >= cocktails.size())
index = 0;
setCocktail(cocktails.get(index));
);
actionPane.add(deleteButton);
add(actionPane, BorderLayout.SOUTH);
protected void setCocktail(Cocktail cocktail)
imageLabel.setIcon(new ImageIcon(cocktail.getImage()));
nameLabel.setText(cocktail.getName());
this.cocktail = cocktail;
public CocktailManager getCocktailManager()
return cocktailManager;
public Cocktail getCocktail()
return cocktail;
public class DefaultCocktailManager implements CocktailManager
private List<Cocktail> cocktails;
private List<Cocktail> nonmutableCocktails;
public DefaultCocktailManager()
cocktails = new ArrayList<>(4);
nonmutableCocktails = Collections.unmodifiableList(cocktails);
for (int index = 1; index < 5; index++)
Image image = null;
try
image = ImageIO.read(getClass().getResource("/images/ct0" + index + ".png")).getScaledInstance(-1, 50, Image.SCALE_SMOOTH);
catch (IOException ex)
ex.printStackTrace();
Cocktail cocktail = new DefaultCocktail(Integer.toString(index), image, "Cocktail " + index);
cocktails.add(cocktail);
@Override
public List<Cocktail> getCocktails()
return nonmutableCocktails;
@Override
public void add(Cocktail cocktail)
cocktails.add(cocktail);
@Override
public void remove(Cocktail cocktail)
cocktails.remove(cocktail);
public class DefaultCocktail implements Cocktail
private String id;
private Image image;
private String name;
public DefaultCocktail(String id, Image image, String name)
this.id = id;
this.image = image;
this.name = name;
@Override
public String getId()
return id;
@Override
public Image getImage()
return image;
@Override
public String getName()
return name;
nb：自带图片
nbb：创建此示例时没有消耗任何鸡尾酒，尽管它可能会提高质量 ?
【讨论】：
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