我在刷新 JTabbedPane 时遇到问题。从类 jPanelAddTabAddShortcut 应用程序按下按钮 addGroup 后，创建一个新文件（工作正常）。
选项卡的数量取决于这些文件的数量，因此如果我再添加 1 个文件，应用程序需要重新计算该数量（在 readFiles() 中设置的静态变量“intFileCount”），然后将最后一个选项卡添加到 JTabbedPane。
简而言之，readFiles() 设置“intFileCount”（选项卡/文件的数量），readTabNames() 设置 strTabName[]（选项卡名称），然后 tabbedPanne() 返回添加了所有选项卡的 JTabbedPane。
我尝试将这 3 种方法添加到按钮操作侦听器并重新验证 + 重新绘制 JTabbedPane 但它不起作用。在此之前我尝试使用 removeALL() ，但这也没有用。
在添加文件（jPanelAddTabAddShortcut 类->addGroup 操作侦听器部分和 saveTabNames() 方法）时，我可能在设置“intFileCount”变量时犯了一些错误。这可能是我的错误，但经过长时间的思考，我认为更有经验的人应该看看这个。
当我重新运行应用程序时，新选项卡已正确添加。
这是代码（我试图尽我所能评论所有内容）：
public class SkrotyAplikacjiTabbed2 {
// main JFrame Class + beforeShowingJFrame()
class mainJFrame extends JFrame
{
public mainJFrame() throws FileNotFoundException, IOException
{
//things to do before JFrame shows up
beforeShowingJFrame();
//Add JTabbedPane
jTabbedPane = tabbedPane();
add(jTabbedPane);
//JFrame Properties
setTitle("Skróty Aplikacji");
setSize(1024, 768);
setResizable(false);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
}
// JPanel used only as background
class JBackgroundPanel extends JPanel
{
private BufferedImage img;
JBackgroundPanel()
{
try
{
img = ImageIO.read(new File("2.jpg"));
}
catch (IOException e)
{
}
}
@Override
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.drawImage(img, 0, 0, getWidth(),getHeight(),this);
}
}
// Jpanel containing pair of (button+jtextarea) -> added to containterPanel
class addShortcut extends JPanel
{
private addShortcut(Icon p,String s,final String strin)
{
GridBagLayout gbLayout2 = new GridBagLayout();
GridBagConstraints d = new GridBagConstraints();
super.setLayout(gbLayout2);
p=resizeIcon(p);
JButton btn1 = new JButton(p);
btn1.setPreferredSize(new Dimension (50,50));
JTextArea ShortcutDescription = new JTextArea();
ShortcutDescription.setLineWrap(true);
ShortcutDescription.setWrapStyleWord(true);
ShortcutDescription.setText(s);
btn1.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
try
{
Runtime.getRuntime().exec("cmd.exe /c start "+ strin);
}
catch (IOException ex)
{
Logger.getLogger(SkrotyAplikacjiTabbed2.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
ShortcutDescription.setOpaque(false);
this.setOpaque(false);
ShortcutDescription.setFont(new Font("Verdana",Font.BOLD,10));
ShortcutDescription.setForeground(Color.WHITE);
//nazwaIkonki.getViewport().setOpaque(false);
ShortcutDescription.setEditable(false);
d.gridy=0;
this.add(btn1,d);
d.gridy=1;
this.add(ShortcutDescription,d);
}
}
// JPanel used to add new Tabbs/Files
class jPanelAddTabAddShortcut extends JPanel
{
//Dodanie komponentow
JTextField newTabName= new JTextField("Nazwa Nowej Grupy");;
JTextField newShortcutDescription = new JTextField("Nazwa Nowego Skrótu");
JButton addGroup = new JButton("Dodaj Grupę");
JButton addShortcut = new JButton("Dodaj Skrót");
jPanelAddTabAddShortcut()
{
//Ustawianie Wymiarow
newTabName.setPreferredSize(new Dimension(260,20));
addGroup.setPreferredSize(new Dimension (130,20));
newShortcutDescription.setPreferredSize(new Dimension(260,20));
addShortcut.setPreferredSize(new Dimension(130,20));
//Ustawienie czcionki
newTabName.setFont(new Font("Verdana",Font.BOLD,10));
newShortcutDescription.setFont(new Font("verdana",Font.BOLD,10));
//Ustawienie widocznosci
this.setOpaque(false);
//JButton dodajacy nowa grupe
//Refresh zakladek
addGroup.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
// dodana nazwa grupy
strTabName[intFileCount] = newTabName.getText();
//Tworzenie pliku dla danej grupy
File f=new File(Integer.toString(intFileCount)+".txt");
try
{
f.createNewFile();
}
catch (IOException ex)
{
Logger.getLogger(SkrotyAplikacjiTabbed2.class.getName()).log(Level.SEVERE, null, ex);
}
//Zapis grupy do pliku
try
{
saveTabNames();
}
catch (IOException ex)
{
Logger.getLogger(SkrotyAplikacjiTabbed2.class.getName()).log(Level.SEVERE, null, ex);
}
//zmienna grup zwiekszona o +1
intFileCount++;
}
});
this.add(newTabName);
this.add(addGroup);
this.add(addShortcut);
this.add(newShortcutDescription);
}
}
SkrotyAplikacjiTabbed2() throws FileNotFoundException, IOException
{
mainJFrame=new mainJFrame();
mainJFrame.setVisible(true);
}
public static void main(String[] args) throws FileNotFoundException, IOException
{
SkrotyAplikacjiTabbed2 skrotyAplikacjiTabbed2 = new SkrotyAplikacjiTabbed2();
}
// resize icon to 40,40
Icon resizeIcon(Icon d)
{
Image img = iconToImage(d);
Image newimg = img.getScaledInstance(40,40,java.awt.Image.SCALE_SMOOTH);
d= new ImageIcon(newimg);
return d;
}
// icon -> image
Image iconToImage(Icon icon)
{
if (icon instanceof ImageIcon)
{
return ((ImageIcon)icon).getImage();
}
else
{
int w = icon.getIconWidth();
int h = icon.getIconHeight();
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gd.getDefaultConfiguration();
BufferedImage image = gc.createCompatibleImage(w,h);
Graphics2D g = image.createGraphics();
icon.paintIcon(null, g, h, h);
g.dispose();
return image;
}
}
// returns JTabbedPane with all Tabbs added
JTabbedPane tabbedPane()
{
JTabbedPane tempJTabbedPane = new JTabbedPane();
int j;
for(j=0;j<intFileCount;j++)
{
tempJTabbedPane.addTab(strTabName[j],jBackgroundPanel[j]);
}
return tempJTabbedPane;
}
// things to do before JFrame shows up
void beforeShowingJFrame() throws FileNotFoundException, IOException
{
readFiles();
readTabNames();
settingPanels();
addingTabComponents();
}
// read Files (sets static intFileCount and intTabComponentCount)
// gets necessary info about shortcut(link,description,icon etc)
void readFiles() throws FileNotFoundException, IOException
{
for(intFileCount=0;intFileCount<1000;intFileCount++)
{
String a;
a = Integer.toString(intFileCount);
File f = new File(a+".txt");
if(f.exists())
{
intTabComponentCount[intFileCount]=0;
Scanner scanner = new Scanner(f);
while (scanner.hasNextLine())
{
strLinksList[intFileCount][intTabComponentCount[intFileCount]]=scanner.nextLine();
strFileList[intFileCount][intTabComponentCount[intFileCount]]= new File(strLinksList[intFileCount][intTabComponentCount[intFileCount]]);
iconFileIcon[intFileCount][intTabComponentCount[intFileCount]]= fsv.getSystemIcon(strFileList[intFileCount][intTabComponentCount[intFileCount]]);
strShortcutDescription[intFileCount][intTabComponentCount[intFileCount]]=scanner.nextLine();
scanner.nextLine();
intTabComponentCount[intFileCount]++;
}
}
else break;
}
}
// read each tab name from a file
void readTabNames() throws FileNotFoundException
{
Scanner scanner = new Scanner(fileGroupFile);
for (int j=0; j<intFileCount;j++)
{
if (scanner.hasNextLine())
{
strTabName[j]=scanner.nextLine();
}
}
}
// adds jScrollPane[j] to jBackgroundPane[j]
// then adds containerPanel[j] to jScrollPane[j]
// sets panels properties
void settingPanels()
{
int j;
for(j=0;j<intFileCount;j++)
{
//inicjalizacja paneli
jBackgroundPanel[j] = new JBackgroundPanel();
containterPanel[j] = new JPanel();
//wlasciwosci paneli
containterPanel[j].setVisible(true);
containterPanel[j].setLayout(new GridBagLayout());
containterPanel[j].setOpaque(false);
jBackgroundPanel[j].setLayout(new BorderLayout());
jScrollPane[j] = new JScrollPane(containterPanel[j]);
jScrollPane[j].setBorder(BorderFactory.createEmptyBorder(0,0,0,0));
jScrollPane[j].setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
jScrollPane[j].setPreferredSize(new Dimension(530,386));
jScrollPane[j].setOpaque(false);
jScrollPane[j].getViewport().setOpaque(false);
jBackgroundPanel[j].add(jScrollPane[j],BorderLayout.WEST);
jBackgroundPanel[j].add(new jPanelAddTabAddShortcut(),BorderLayout.SOUTH);
}
}
// saves edited Tab names to file
public void saveTabNames() throws IOException
{
PrintWriter printWriter = new PrintWriter(fileGroupFile);
for (int j=0; j<intFileCount+1;j++)
{
printWriter.println(strTabName[j]);
printWriter.flush();
}
}
// add pair of (jbutton+jtextarea) to chosen containterPanel[]
// using method addShortcut
void addingTabComponents()
{
int j,k;
for (j=0;j<intFileCount;j++)
{
v=0;
q=0;
for (k=0;k<intTabComponentCount[j];k++)
{
c.gridx=v;
c.gridy=q;
c.insets= new Insets(5,5,5,5);
containterPanel[j].add(new addShortcut(iconFileIcon[j][k],strShortcutDescription[j][k],strLinksList[j][k]),c);
if(v<4)
{
v++;
}
if (v==4)
{
v=0;
q++;
}
}
}
}
//readFiles() Variables
static int intFileCount=0; // counts tabbs
static int[] intTabComponentCount= new int[1000]; // counts components added to related tab
//GridBagLayout Variables
int v=0,q=0; // gridx and gridy
GridBagConstraints c = new GridBagConstraints();
//Tab Variables
String[] strTabName = new String [1000]; // tab names
final File fileGroupFile = new File("grupy.txt"); // file containig tab names
File fileNewShortcutFile; // variable storing temporary file which will be set as a new tab
//Shortcut Componnents Variables
String[][] strShortcutDescription = new String [1000][1000]; // description below shortcut
Icon[][] iconFileIcon = new Icon[1000][1000]; // shortcut icon
String[][] strLinksList = new String[1000][1000]; // shortcut link
File[][] strFileList = new File[1000][1000]; // File linked to related shortcut
//Other Variables
JBackgroundPanel[] jBackgroundPanel = new JBackgroundPanel[1000]; // background JPanel
JScrollPane[] jScrollPane = new JScrollPane[1000]; // added to background Jpanel
JPanel[] containterPanel = new JPanel[1000]; // added to JScrollPane; contains shortcuts + their descriptions
FileSystemView fsv = FileSystemView.getFileSystemView(); // used to get file icon
JTabbedPane jTabbedPane; // JTabbedPane
mainJFrame mainJFrame; // main JFrame
}