如何在同一個桌面窗格中從JInternalframe打開另一個JInternalframe

Question

我在桌面窗格中有一個JInternalframe（tab_items）。我想在同一桌面窗格中打開另一個JInternalframe（frm_add_items），每當用戶單擊tab_items中的彈出菜單時。我怎樣才能做到這一點？通過您的片段熊細看之下提出

//class tab_items 

public class tab_items extends JInternalFrame implements MouseListener,DocumentListener,ActionListener{ 

    DS co= new DS(); 
    JPanel panel1; 
    JScrollPane pane; 
    DefaultTableModel model= new DefaultTableModel(); 
    JTable tbl= new JTable(model); 
    JLabel lbl_search; 
    JTextField txt_search; 
    JPopupMenu pop; 
    JMenuItem mi_add,mi_edit, mi_del; 

    public tab_items(){ 


     panel1= new JPanel(); 
     panel1.setLayout(null);  

     //popupmenu 
     pop=new JPopupMenu(); 
     mi_add=new JMenuItem("Add new record"); 
     mi_edit=new JMenuItem("Edit record"); 
     mi_del=new JMenuItem("Delete record"); 
     add(pop); 

     pop.add(mi_add);   
     mi_add.addActionListener(this); 
     mi_add.addMouseListener(this); 
     pop.add(mi_edit); 
     mi_edit.addActionListener(this); 

     pop.add(mi_del); 
     mi_del.addActionListener(this); 

     //  try{ 
     //   UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
     //  }catch(Exception ex){} 

      initcomponents();   
      setVisible(true); 
      setSize(700,500); 
      setLocation(100,150); 
      setTitle("List Of Items");   
      setDefaultCloseOperation(EXIT_ON_CLOSE); 


    } 

    public void initcomponents(){ 

    try{   
     model.addColumn("ID"); 
     model.addColumn("Item Name"); 
     model.addColumn("Cost Price"); 
     model.addColumn("Selling Price"); 
     model.addColumn("Qty"); 

     tbl.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 
     PreparedStatement pstat=co.con.prepareStatement("Select * from tbl_items ORDER BY itemid ASC"); 
     ResultSet rs=pstat.executeQuery();  
      while(rs.next()){ 
       model.addRow(new Object[]{rs.getInt(1), rs.getString(2).trim(), rs.getString(3).trim(), rs.getString(4).trim(),rs.getInt(5)}); 
      }     
     }catch(Exception ex){} 

    // SETTING COLUMN WIDTH 
      TableColumnModel model=tbl.getColumnModel();   
      model.getColumn(0).setPreferredWidth(50); 
      model.getColumn(1).setPreferredWidth(400); 
      model.getColumn(2).setPreferredWidth(100); 
      model.getColumn(3).setPreferredWidth(100); 
      model.getColumn(4).setPreferredWidth(50); 

     // adding panel 

     add(panel1); 
     panel1.setBounds(0,0,800,600); 

     //scrollpane initialize  
     int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS; 
     int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS; 
     pane=new JScrollPane(tbl, v, h); //table included in scrollpane 
     panel1.add(pane); 
     pane.setBounds(0,50,700,400); 
     tbl.addMouseListener(this); 

     lbl_search= new JLabel(); 
     lbl_search.setIcon(new ImageIcon(getClass().getResource("/img/btn_search_up.png"))); 
     panel1.add(lbl_search); 
     lbl_search.setBounds(5,10,25,20); 

     txt_search=new JTextField(); 
     panel1.add(txt_search); 
     txt_search.setBounds(35,10,200,20); 
     txt_search.getDocument().addDocumentListener(this); 
     /* 
     btn_add= new JButton(); 
     btn_add.setIcon(new ImageIcon(getClass().getResource("/img/add-button-md.png"))); 
     // btn_add.setHorizontalAlignment(SwingConstants.CENTER); 
     // btn_add.setText("Add"); 

     add(btn_add); 
     btn_add.setBounds(665, 125, 65, 65); 

     btn_edit= new JButton();   
     btn_edit.setText("Update"); 
     add(btn_edit); 
     btn_edit.setBounds(665, 200, 65, 65); 

     btn_delete=new JButton(); 
     btn_delete.setText("Delete"); 
     add(btn_delete); 
     btn_delete.setBounds(665, 275, 65, 65); 
     */   

    } 

    public void mouseClicked(MouseEvent e) {} 
    public void mousePressed(MouseEvent me){maybeShowPopup(me);} 
    public void mouseReleased(MouseEvent me){maybeShowPopup(me);} 
    public void mouseEntered(MouseEvent e) {} 
    public void mouseExited(MouseEvent e) {} 
    private void maybeShowPopup(MouseEvent e){ 
     if (e.isPopupTrigger()){ 
      pop.show(e.getComponent(),e.getX(), e.getY());    
     } 
} 

    public void update(DocumentEvent de){ 

         Document doc=(Document)de.getDocument(); 
      int length=doc.getLength(); 
      String str=null; 
      try 
      { 
       str=doc.getText(0,length); 
      } 
      catch(Exception ex) 
      { 
          JOptionPane.showMessageDialog(null, "Error in retreiving Search Length\n"+ex); 
      } 

         try 
       { 
             Class.forName("com.mysql.jdbc.Driver"); 
             Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/dstore","root",""); 
        PreparedStatement pstat=con.prepareStatement("select * from tbl_items where itemid LIKe '"+str+"%' OR itemname LIKe '"+str+"%' ORDER BY itemid ASC"); 
             ResultSet rs=pstat.executeQuery(); 
             model.setRowCount(0); 
             while(rs.next()){ 
              model.addRow(new Object[]{rs.getInt(1), rs.getString(2).trim(), rs.getString(3).trim(), rs.getString(4).trim(),rs.getInt(5)}); 
             } 

       } 
       catch(Exception ex) 
       { 
        JOptionPane.showMessageDialog(null,"ERROR IN DOCUMENT LISTENER.\nCannot Fetch Records"+ex); 
       } 

    } 
    public void insertUpdate(DocumentEvent de) { 
    update(de); 
    } 
    public void removeUpdate(DocumentEvent de) { 
    update(de); 
    } 
    public void changedUpdate(DocumentEvent de) { 
    update(de); 
    } 

    public void actionPerformed(ActionEvent ae) { 


     if(ae.getSource()==mi_add){ 

    // frm_add_item ob= new frm_add_item(); 
    // ob.show(); 
     // dp.add(ob); 

     }else if(ae.getSource()==mi_edit) { 


     }else { 


     } 

    } 

} 

#//class frm_main (it contains desktop pane)# 

Answer 1

幾個問題：

• 使用Action封裝功能。

• 請勿延長JInternalFrame不必要;使用工廠方法。

• 請勿使用setBounds();使用layout manager。

import java.awt.Dimension; 
import java.awt.event.ActionEvent; 
import java.beans.PropertyVetoException; 
import javax.swing.AbstractAction; 
import javax.swing.JButton; 
import javax.swing.JDesktopPane; 
import javax.swing.JFrame; 
import javax.swing.JInternalFrame; 
import javax.swing.JMenuItem; 
import javax.swing.JPanel; 
import javax.swing.JPopupMenu; 
import javax.swing.SwingUtilities; 

//** @see http://stackoverflow.com/a/18556224/230513 */ 
public class Test { 

    private JDesktopPane jdp = new JDesktopPane() { 
     @Override 
     public Dimension getPreferredSize() { 
      return new Dimension(600, 400); 
     } 
    }; 
    private NewAction newAction = new NewAction("New"); 

    public Test() { 
     createAndShowGUI(); 
    } 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       new Test(); 
      } 
     }); 
    } 

    private void createAndShowGUI() { 
     JFrame frame = new JFrame(); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     newAction.actionPerformed(null); 
     frame.add(jdp); 
     frame.pack(); 
     frame.setVisible(true); 
    } 

    private void createInternalFrame(int x, int y) { 
     final JInternalFrame jif = 
      new JInternalFrame("Test" + x, true, true, true, true); 
     jif.setLocation(x, y); 
     JPanel jp = new JPanel() { 
      @Override 
      public Dimension getPreferredSize() { 
       return new Dimension(256, 128); 
      } 
     }; 
     JPopupMenu popup = new JPopupMenu(); 
     jp.setComponentPopupMenu(popup); 
     popup.add(new JMenuItem(newAction)); 
     jp.add(new JButton(newAction)); 
     jif.add(jp); 
     jif.pack(); 
     jdp.add(jif); 
     jif.setVisible(true); 
     try { 
      jif.setSelected(true); 
     } catch (PropertyVetoException e) { 
      e.printStackTrace(System.err); 
     } 
    } 

    private class NewAction extends AbstractAction { 

     private int i; 

     public NewAction(String name) { 
      super(name); 
     } 

     @Override 
     public void actionPerformed(ActionEvent ae) { 
      i++; 
      createInternalFrame(50 * i, 50 * i); 

     } 
    } 
} 

Answer 2

您必須添加後的JInternalFrame在第一JInternalFrame的父。例如，您在JDesktopPane中添加第一個JInternalFrame作爲

JdesktopPane.add(JInternalFrame_obj1); 
    JInternalFrame_obj1.toFront(); 

然後單擊一個按鈕以添加另一個JInternalFrame。除了所示的JInternalFrame

JdesktopPane.add(JInternalFrame_obj2); 
    JInternalFrame_obj2.toFront(); 

如果按鍵被安置在其他如果按鍵被安置在JInternalFrame_obj1添加

this.getParent().add(JInternalFrame_obj12); 
    JInternalFrame_obj2.toFront();