java - 计算 JTable 中的列和行中的值的总和

Question

我正在用 Java 编写一个程序，需要你们的帮助。问题是:

1. 如果我按下按钮(Tüm 0)，我希望程序将第一行中的值相加，并将其显示在我用 ?????? 标记的单元格中。

   如果我按下按钮 (Tüm 2)，我希望程序将第二列中的值相加，并将其显示在我用 ???? 标记的单元格中。

2. 如果我在该表中选择窗帘单元格，JTable 是否具有像 Excel 一样对值求和并显示它们的功能？这是代码:

   package mgm;
   public class thirdFrame extends JFrame{
   
   private JPanel contentPane;
   private JFrame thirdFrame;
   private JTextField tF;
   private JTextField tF1;
   private JTextField tF2;
   private JTable table;
   private JTextField tF3;
   private JTextField tF4;
   private JTextField tF5;
   
   public thirdFrame() {
   thirdFrame = new JFrame();
   thirdFrame.setFont(new Font("David",Font.BOLD,17));                     
   thirdFrame.setTitle("TOSCOW");
   thirdFrame.setIconImage(Toolkit.getDefaultToolkit().getImage("C:\\Users\\EXP\\Desktop\\mgm\\src\\MGM-LOGO.png"));
   thirdFrame.setBounds(100, 100, 1600, 620);
   thirdFrame.setVisible(true);
   thirdFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   thirdFrame.getContentPane().setLayout(null);
   JDesktopPane desktop = new JDesktopPane();
   desktop.setOpaque(true);
   thirdFrame.getContentPane().add(desktop);
   
   JInternalFrame internalFrame = new JInternalFrame ("MGMSportif ",false,true,false,true);
   internalFrame.setFrameIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\reized logo.png"));
   internalFrame.setBounds(209, 126, 720, 400);
   
   JToolBar toolBar = new JToolBar();
   toolBar.setBounds(0, 0, 1362, 32);
   thirdFrame.getContentPane().add(toolBar);
   JButton bt = new JButton("");
   bt.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
   bt.setToolTipText("Dosya a\u00E7mak i\u00E7in t\u0131klay\u0131n");
   bt.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\open-file-icon.png"));
   toolBar.add(bt);
   JButton bt1 = new JButton("");
   bt1.addActionListener(new ActionListener() {
        @Override
   public void actionPerformed(ActionEvent e) {
       Save sF =new Save();
       sF.setVisible(false);
       dispose();                  
               }
           });
   bt1.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
   bt1.setToolTipText("Kay\u0131d etmek i\u00E7in t\u0131klay\u0131n");
   bt1.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\save.png"));
   toolBar.add(bt1);
   JButton bt2 = new JButton("");
   bt2.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
   bt2.setToolTipText("Kesmek i\u00E7in t\u0131klay\u0131n");
   bt2.setIcon(new ImageIcon       
   ("C:\\Users\\EXP\\Desktop\\mgm\\src\\Cut-icon.png"));
   toolBar.add(bt2);
   JButton bt3 = new JButton("");
   bt3.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));           
   bt3.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e) {
   internalFrame.setVisible(true);
       }
        });
   
   thirdFrame.getContentPane().add(internalFrame);
   internalFrame.getContentPane().setLayout(null);
   JLabel lb = new JLabel("Tarihe g\u00F6re ara");
   lb.setFont(new Font("Tahoma", Font.PLAIN, 13));
   lb.setBounds(10, 11, 110, 26);
   internalFrame.getContentPane().add(lb);
   tF = new JTextField();
   tF.setToolTipText("Aramak isteyen tarihi giriniz");
   tF.setBounds(144, 16, 445, 20);
   internalFrame.getContentPane().add(tF);
   tF.setColumns(10);
   JProgressBar pBar = new JProgressBar(0);
   pBar.setValue(0);
   pBar.setString("Aranıyor...."); 
   pBar.setStringPainted(true);
   pBar.setBounds(10, 67, 684, 21);
   internalFrame.getContentPane().add( pBar);
   JButton sesarchButton = new JButton("");
    sesarchButton.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
   sesarchButton.addActionListener(new ActionListener() {
        @Override
   public void actionPerformed(ActionEvent e) {
   sesarchButton.setEnabled(false);
   setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
           }
      });      
   sesarchButton.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\search48.png"));
   sesarchButton.setBounds(599, 7, 57, 56);
   internalFrame.getContentPane().add(sesarchButton);
   JLabel lb1 = new JLabel("Makineye  g\u00F6re ara");
   lb1.setFont(new Font("Tahoma", Font.PLAIN, 13));
   lb1.setBounds(10, 43, 124, 20);
   internalFrame.getContentPane().add( lb1);
   tF1 = new JTextField();
   tF1 .setBounds(144, 42, 445, 20);
   internalFrame.getContentPane().add(tF1 );
   tF1 .setColumns(10);
   tF1 .setBounds(144, 42, 445, 20);
   JList list = new JList();
   list.setBounds(10, 99, 684, 360);
   internalFrame.getContentPane().add(list);       bt3.setToolTipText("Dosya aramak i\u00E7in t\u0131klay\u0131n");
   bt3.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\Zoom-icon.png"));
    toolBar.add( bt3);
   JButton bt4 = new JButton("");
   bt4.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
   bt4.setToolTipText("\u00C7\u0131kt\u0131 almak i\u00E7in         t\u0131klay\u0131n");
   bt4.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\print-icon16.png"));
   toolBar.add(bt4);
    JButton bt5 = new JButton("");
   bt5.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
   bt5.setToolTipText("Pencereyi kapatmak i\u00E7in t\u0131klay\u0131n");
   bt5.setIcon(new ImageIcon("C:\\Users\\EXP\\Desktop\\mgm\\src\\Close.png"));
   toolBar.add(bt5);
   JCheckBox checkBox = new JCheckBox("Enjeksyon Makine No:");
   checkBox.addItemListener(new ItemListener() {
         @Override
     public void itemStateChanged(ItemEvent e) {
   if(e.getStateChange() == ItemEvent.SELECTED){
   tF2.setEnabled(true);
                  }                     
    else if(e.getStateChange() == ItemEvent.DESELECTED){
    tF2.setEnabled(false);
             }
         }              
            });    
         checkBox.setFont(new Font("Tahoma", Font.PLAIN, 11));
   checkBox.setBounds(25, 39, 131, 23);
   thirdFrame.getContentPane().add(checkBox);
   
    tF2 = new JTextField();
    tF2.setBounds(162, 40, 31, 19);
   thirdFrame.getContentPane().add( tF2);
    tF2.setColumns(10);
   
   JCheckBox checkBox1 = new JCheckBox("Kaynak Makine No:");
   checkBox1.addItemListener(new ItemListener() {
        @Override
       public void itemStateChanged(ItemEvent e) {
            if(e.getStateChange() == ItemEvent.SELECTED){
                tF3.setEnabled(true);
                tF3.setText("");
            }
            else if(e.getStateChange() == ItemEvent.DESELECTED){
                tF3.setEnabled(false);
                tF3.setText("");
            }
   
   
       }
   });
      checkBox1.setFont(new Font("Tahoma", Font.PLAIN, 11));
   checkBox1.setBounds(337, 39, 117, 23);
   thirdFrame.getContentPane().add(checkBox1);
   
   tF3 = new JTextField();
   
   tF3.setBounds(460, 43, 31, 19);
   thirdFrame.getContentPane().add(tF3);
   tF3.setColumns(10);
   
   JCheckBox checkBox2 = new JCheckBox("Otomatsyon Makine No:");
   checkBox2.addItemListener(new ItemListener() {
        @Override
       public void itemStateChanged(ItemEvent e) {
            if(e.getStateChange() == ItemEvent.SELECTED){
                tF4.setEnabled(true);
                tF4.setText("");
            }
            else if(e.getStateChange() == ItemEvent.DESELECTED){
                tF4.setEnabled(false);
                tF4.setText("");
            }
   
   
       }
   });
     checkBox2.setFont(new Font("Tahoma", Font.PLAIN, 11));
   checkBox2.setBounds(651, 39, 141, 23);
   thirdFrame.getContentPane().add(checkBox2);
   
   tF4 = new JTextField();
   tF4.setBounds(795, 43, 31, 19);
   thirdFrame.getContentPane().add(tF4);
   tF4.setColumns(10);
   
   JCheckBox checkBox3 = new JCheckBox("Pakitleme:");
   checkBox3.setFont(new Font("Tahoma", Font.PLAIN, 11));
   checkBox3.addItemListener(new ItemListener() {
   
       public void itemStateChanged(ItemEvent e) {
           if(e.getStateChange() == ItemEvent.SELECTED){
               tF5.setEnabled(true);
               tF5.setText("");
           }
           else if(e.getStateChange() == ItemEvent.DESELECTED){
               tF5.setEnabled(false);
               tF5.setText("");
           }
       }
   });
   
   
   
   checkBox3.setBounds(923, 39, 85, 23);
   thirdFrame.getContentPane().add(checkBox3);
   
   tF5 = new JTextField();
   tF5.setBounds(1010, 43, 31, 19);
   thirdFrame.getContentPane().add(tF5);
   tF5.setColumns(10);
   
   JLabel lb2 = new JLabel("                                                 Vardiya 1                                                                                                                                                                                                          Vardiya 2");
   lb2.setForeground(SystemColor.desktop);
   lb2.setFont(new Font("Tahoma", Font.PLAIN, 13));
   lb2.setBounds(0, 73, 1341,21);
   thirdFrame.getContentPane().add(lb2);
   
   JScrollPane scrollPane = new JScrollPane();
   scrollPane.setBounds(20, 94, 1324, 455);
   thirdFrame.getContentPane().add(scrollPane);
   
   table = new JTable();
   JTable table = new JTable();
   table.setColumnSelectionAllowed(true);
   table.setAutoCreateRowSorter(true);
   
   
   table.setForeground(Color.BLACK);
   table.setModel(new DefaultTableModel(
       new Object[][] {
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
           {null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null},
       },
       new String[] {
           "TAR\u0130H", "BEYAZ", "KIRMIZI", "MAV\u0130", "SARI", "S\u0130YAH", "ADET", "PERS.", "\u00DCR.NEDEN\u0130", "Toplam", "TAR\u0130H", "BEYAZ", "KIRMIZI", "MAV\u0130", "SARI", "S\u0130YAH", "ADET", "PERS.", "\u00DCR.NEDEN\u0130", "Toplam", "2VDT"
       }
   ) {
       Class[] columnTypes = new Class[] {
           Integer.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class, Object.class
       };
       public Class getColumnClass(int columnIndex) {
           return columnTypes[columnIndex];
       }
   });
   scrollPane.setViewportView(table);
   
   
   JSeparator separator = new JSeparator();
   separator.setBounds(0, 69, 1362, 2);
   thirdFrame.getContentPane().add(separator);
   
   JButton bt6 = new JButton("T\u00FCm 0");
   bt6.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt6.setBounds(579, 69, 61, 23);
   thirdFrame.getContentPane().add(bt6);
   
   JButton bt7 = new JButton("T\u00FCm 1");
   bt7.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt7.addActionListener(new ActionListener() {
   
   
       public void actionPerformed(ActionEvent e) {
   
   
       }
   });
   
   bt7.setBounds(1201, 69, 61, 23);
   thirdFrame.getContentPane().add(bt7);
   
   JButton bt8 = new JButton("T\u00FCm 2");
   bt8.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt8.addActionListener(new ActionListener() {
   
      public void actionPerformed(ActionEvent e) {
   
   
       }
   });
   
   bt8.setBounds(82, 551, 61, 23);
   thirdFrame.getContentPane().add(bt8);
   
   JButton bt9 = new JButton("T\u00FCm 3");
   bt9.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt9.setBounds(145, 551, 61, 23);
   thirdFrame.getContentPane().add(bt9);
   
   JButton bt10 = new JButton("T\u00FCm 4");
   bt10.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt10.setBounds(207, 551, 61, 23);
   thirdFrame.getContentPane().add(bt10);
   
   JButton bt11 = new JButton("T\u00FCm 5");
   bt11.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt11.setBounds(270, 551, 61, 23);
   thirdFrame.getContentPane().add(bt11);
   
   JButton bt12 = new JButton("T\u00FCm 6");
    bt12.setFont(new Font("Tahoma", Font.PLAIN, 8));
    bt12.setBounds(332, 551, 61, 23);
   thirdFrame.getContentPane().add( bt12);
   
   JButton bt13 = new JButton("T\u00FCm 7");
   bt13.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt13.setBounds(395, 551, 61, 23);
   thirdFrame.getContentPane().add(bt13);
   
   JButton b14 = new JButton("T\u00FCm 8");
   b14.setFont(new Font("Tahoma", Font.PLAIN, 8));
   b14.setBounds(703, 551, 61, 23);
   thirdFrame.getContentPane().add(b14);
   
   JButton bt15 = new JButton("T\u00FCm 9");
   bt15.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt15.setBounds(764, 551, 61, 23);
   thirdFrame.getContentPane().add(bt15);
   
   JButton bt16 = new JButton("T\u00FCm 10");
   bt16.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt16.setBounds(826, 551, 61, 23);
   thirdFrame.getContentPane().add(bt16);
   
   JButton bt17 = new JButton("T\u00FCm 11");
   bt17.setFont(new Font("Tahoma", Font.PLAIN, 8));
   bt17.setBounds(889, 551, 61, 23);
   thirdFrame.getContentPane().add(bt17);
   
   JButton bt18 = new JButton("T\u00FCm 12");
    bt18.setFont(new Font("Tahoma", Font.PLAIN, 8));
    bt18.setBounds(952, 551, 61, 23);
   thirdFrame.getContentPane().add( bt18);
   
   JButton bt19 = new JButton("T\u00FCm 13");
    bt19.setFont(new Font("Tahoma", Font.PLAIN, 8));
    bt19.setBounds(1015, 551, 61, 23);
   thirdFrame.getContentPane().add( bt19);
   
   
   
   }
    }              
   

Answer 1

没有内置的求和函数，但您可以编写自己的求和函数。重写(匿名)TableModel 中的 getValueAt() 方法，如下所示 here 。在下面的片段中，sum(col) 应调用 super.getValueAt() 来添加在特定 col 中找到的值。我不确定是否需要一排按钮。

@Override
public Object getValueAt(int row, int col) {
    if (row == DEPENDENT_ROW) {
        return sum(col);
    } else {
        return super.getValueAt(row, col);
    }
}