JTable image
Java Source code to add Row and Column in JTable dynamically
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package com.example; import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import java.util.Vector; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.WindowConstants; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableColumn; import javax.swing.table.TableColumnModel; public class JTableSample { private JFrame mainFrame ; private JTable table; private JCheckBox col1; private JCheckBox col2; private JCheckBox col3; private TableColumnModel tableColumnModel; private JPanel panel; private String[] columnNamesArr; private ArrayList<String> columnNamesList; private JScrollPane scrollPane; private String[][] data; private DefaultTableModel defaultTableModel; private JButton addButton; private JButton deleteButton; private JPanel panelButton; public JTableSample() { mainFrame = new JFrame("JTableSample"); col1 = new JCheckBox("col1"); col2 = new JCheckBox("col2"); col3 = new JCheckBox("col3"); col1.setSelected(true); col2.setSelected(true); col3.setSelected(true); columnNamesList = new ArrayList<String>(); columnNamesList.add("col0"); columnNamesList.add("col1"); columnNamesList.add("col2"); columnNamesList.add("col3"); data = new String[1][columnNamesList.size()]; columnNamesArr = new String[columnNamesList.size()]; for(int i=0;i<columnNamesList.size();i++) { columnNamesArr[i] = columnNamesList.get(i); data[0][i]=""; } defaultTableModel = new DefaultTableModel(data, columnNamesArr); table = new JTable(defaultTableModel); tableColumnModel = table.getColumnModel(); for(int i=0;i<columnNamesList.size();i++) { tableColumnModel.getColumn(i).setPreferredWidth(columnNamesList.get(i).length()); } table.setPreferredScrollableViewportSize(table.getPreferredSize()); scrollPane = new JScrollPane(table); col1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if(!col1.isSelected()) { TableColumn toRemove = table.getColumn("col1"); table.removeColumn(toRemove); table.validate(); } else { TableColumn toAdd = new TableColumn(); toAdd.setHeaderValue("col1"); toAdd.setIdentifier("col1"); toAdd.setPreferredWidth("col1".length()); table.addColumn(toAdd); table.validate(); } } }); col2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if(!col2.isSelected()) { TableColumn toRemove = table.getColumn("col2"); table.removeColumn(toRemove); table.validate(); } else { TableColumn toAdd = new TableColumn(); toAdd.setHeaderValue("col2"); toAdd.setIdentifier("col2"); toAdd.setPreferredWidth("col2".length()); table.addColumn(toAdd); table.validate(); } } }); col3.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if(!col3.isSelected()) { TableColumn toRemove = table.getColumn("col3"); table.removeColumn(toRemove); table.validate(); } else { TableColumn toAdd = new TableColumn(); toAdd.setHeaderValue("col3"); toAdd.setIdentifier("col3"); toAdd.setPreferredWidth("col3".length()); table.addColumn(toAdd); table.validate(); } } }); addButton = new JButton("Add"); deleteButton = new JButton("Delete"); addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Vector rowData = null; defaultTableModel.addRow(rowData); table.validate(); } }); deleteButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { Vector rowData = null; int rowCount = defaultTableModel.getRowCount(); if(rowCount>0) { defaultTableModel.removeRow(rowCount-1); table.validate(); } } }); panel = new JPanel(); panel.add(col1); panel.add(col2); panel.add(col3); panelButton = new JPanel(); panelButton.add(addButton); panelButton.add(deleteButton); mainFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); mainFrame.add(scrollPane, BorderLayout.CENTER); mainFrame.add(panel, BorderLayout.NORTH); mainFrame.add(panelButton,BorderLayout.SOUTH); mainFrame.pack(); mainFrame.setLocation(150, 150); mainFrame.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { JTableSample jts = new JTableSample(); } }); } } |
The code has error, also where is the link to download source code as the source code link redirects to some other page .
can you specify the error you are getting
agree. your code have bunch of errors. did you test this before posting?
Thank you for pointing out the errors. I have corrected the errors.
Please let me know in case of any issues.
Don’t forget to rate it.(if you find it helpful)
Happy coding!
Hi Nikhil,
To download the code, you simple need copy-paste it. When you hover your mouse on the code section, a drop-down appears at the top in which the button on second to rightmost allows you to copy the code.
Hope it helps.