计算 JTable 中列和行中值的总和

Question

我正在 Java 制作一个程序，需要你们的帮助。问题是：

如果我按下按钮 (Tüm 0)，我希望程序将第一个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显示在我用 ????? 标记的单元格中。

如果我 select 关闭 table 中的单元格，JTable 是否具有 excel 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

没有内置求和函数，但您可以自己编写。如 here 所示，覆盖您的（匿名）TableModel 中的 getValueAt() 方法。在下面的片段中，sum(col) 应该调用 super.getValueAt() 来添加在特定 col 中找到的值。我不确定是否需要一行按钮。

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

Answer 2

回答你的第二个问题，JTable 没有像 excel 这样的求和函数。您将需要自己实施这些。要连续对值求和，您可以使用类似这样的方法。

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;
}

对于列，您只需更改行索引并保持列索引不变即可。此函数假定您的 table 列是 Integer 类型并且值不为空。如果不是这种情况，您将不得不在其中进行一些空检查和解析。

要查找具有特定值的单元格，您必须遍历行和列。类似于此

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;
}

到 get/set 单元格的值请参阅 javadoc 以获得 get and set table 模型值的函数。

计算 JTable 中列和行中值的总和

Calculate sum of the values in columns and rows in JTable

java

swing

jtable