計算JTable中列和行中值的總和

Question

我正在用Java開發程序，需要你們的幫助。 問題是：

1. 如果按下按鈕（Tüm0），我希望程序將rist行中的值相加並顯示在用?????標記的單元格中。

   如果按下按鈕（Tüm2），我希望程序將第二列中的值加起來並顯示在用????標記的單元格中。

2. 如果我在表中選擇窗簾單元格，JTable是否具有excel的功能，可以將值求和並顯示出來？ 這是代碼：

    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\çmak i\çin t\ıklay\ın"); 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\ıd etmek i\çin t\ıklay\ın"); 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\çin t\ıklay\ın"); 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\öre 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\öre 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\çin t\ıklay\ın"); 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("\Ç\ıkt\ı almak i\çin t\ıklay\ın"); 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\çin t\ıklay\ın"); 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\İH", "BEYAZ", "KIRMIZI", "MAV\İ", "SARI", "S\İYAH", "ADET", "PERS.", "\ÜR.NEDEN\İ", "Toplam", "TAR\İH", "BEYAZ", "KIRMIZI", "MAV\İ", "SARI", "S\İYAH", "ADET", "PERS.", "\ÜR.NEDEN\İ", "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\üm 0"); bt6.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt6.setBounds(579, 69, 61, 23); thirdFrame.getContentPane().add(bt6); JButton bt7 = new JButton("T\üm 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\üm 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\üm 3"); bt9.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt9.setBounds(145, 551, 61, 23); thirdFrame.getContentPane().add(bt9); JButton bt10 = new JButton("T\üm 4"); bt10.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt10.setBounds(207, 551, 61, 23); thirdFrame.getContentPane().add(bt10); JButton bt11 = new JButton("T\üm 5"); bt11.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt11.setBounds(270, 551, 61, 23); thirdFrame.getContentPane().add(bt11); JButton bt12 = new JButton("T\üm 6"); bt12.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt12.setBounds(332, 551, 61, 23); thirdFrame.getContentPane().add( bt12); JButton bt13 = new JButton("T\üm 7"); bt13.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt13.setBounds(395, 551, 61, 23); thirdFrame.getContentPane().add(bt13); JButton b14 = new JButton("T\üm 8"); b14.setFont(new Font("Tahoma", Font.PLAIN, 8)); b14.setBounds(703, 551, 61, 23); thirdFrame.getContentPane().add(b14); JButton bt15 = new JButton("T\üm 9"); bt15.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt15.setBounds(764, 551, 61, 23); thirdFrame.getContentPane().add(bt15); JButton bt16 = new JButton("T\üm 10"); bt16.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt16.setBounds(826, 551, 61, 23); thirdFrame.getContentPane().add(bt16); JButton bt17 = new JButton("T\üm 11"); bt17.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt17.setBounds(889, 551, 61, 23); thirdFrame.getContentPane().add(bt17); JButton bt18 = new JButton("T\üm 12"); bt18.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt18.setBounds(952, 551, 61, 23); thirdFrame.getContentPane().add( bt18); JButton bt19 = new JButton("T\üm 13"); bt19.setFont(new Font("Tahoma", Font.PLAIN, 8)); bt19.setBounds(1015, 551, 61, 23); thirdFrame.getContentPane().add( bt19); } } 

Answer 1

沒有內置的sum函數，但是您可以編寫自己的函數。 重寫getValueAt()方法，在你（匿名） TableModel如圖所示這里 。 在下面的片段中， sum(col)應該調用super.getValueAt()以添加在特定col找到的值。 我不確定是否需要一行按鈕。

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

Answer 2

要回答您的第二個問題，沒有JTable沒有像excel這樣的sum函數。 您將需要自己實現這些。 要對行中的值求和，可以使用類似這樣的東西。

public int sumRow(TableModel mdl, int row) {
    int total = 0;
    // iterate over all columns
    for (int i = 0 ; i < mdl.getColumnCount() ; i++) {
        // null or not Integer will throw exception
        total += (Integer) mdl.getValueAt(row, i);
    }
    return total;
}

對於列，這很相似，您只需更改行索引並保持列索引不變即可。 此函數假定您的表列的類型為Integer，並且值不為null。 如果不是這種情況，您將不得不在其中進行一些空檢查和解析。

要查找具有特定值的單元格，您必須遍歷行和列。 與此類似

public int[] findValue(TableModel mdl, Object value) {
    int[] returnVal = {-1, -1}; // default returnVal if value is not found
        // iterate over rows
        for(int row = 0 ; row < mdl.getRowCount() ; row++){
            // iterate over columns
            for(int col = 0 ; col < mdl.getColumnCount() ; col++) {
                // if table cell is null it is ignored
                if (mdl.getValueAt(row, col) != null && mdl.getValueAt(row, col).equals(value)) {
                    returnVal[0] = row;
                    returnVal[1] = col;
                    return returnVal;
                }
            }
        }
    return returnVal;
}

要獲取/設置單元格的值，請參見javadoc，以獲取和設置表模型值的函數。