How to dynamically filter JTable from textfield in Java

In this tutorial, we are going to see how to dynamically filter jTable from textfield in Java. JTable is a flexible Swing component, is a subclass of JComponent class and it can be used to create a table with information displayed in multiple rows and columns. We can search for words dynamically in a JTable by using RowFilter to filter the search results. Here is an example using RowFilter and DocumentListener. As the user types, the rows are dynamically filtered.

If you don’t want dynamic filtering, you can simply use a button, or you can add an ActionListener to JTextField, so when you press Enter, the filter will be processed.

 

Java Program to dynamically filter JTable from textfield:

import java.awt.BorderLayout;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class SearchInJtable extends JPanel 
{
    //JTable Header 
    String[] columns = new String[] {
        "Id",
        "Name", 
        "Address", 
        "Hourly rate", 
        "Part time"
    };

    //JTable data in a 2D table
    Object[][] data = new Object[][] {
        {1, "Thomas", "259 Saint James Drive, Florida", 20.0, true },
        {2, "Jean", "2189 Saints Alley, Florida", 50.0, false },
        {3, "Yohan", "3840 Irish Lane, Boston", 30.0, true },
        {4, "Emily", "222 Duff Avenue, New York", 60.0, false },
        {5, "Alex", "1632 Village View Drive, Missouri", 10.0, false },
    };

    //create a JTable with data
    JTable table = new JTable(data, columns);

    TableRowSorter<TableModel> sort = new TableRowSorter<>(table.getModel());

    JTextField textField = new JTextField();

    public SearchInJtable() 
    {
        //set the width of the 3rd column to 200 pixels
        TableColumnModel columnModel = table.getColumnModel();
        columnModel.getColumn(2).setPreferredWidth(200);
    
        table.setRowSorter(sort);

        JPanel p = new JPanel(new BorderLayout());
        p.add(new JLabel("Search for a word:"), BorderLayout.WEST);
        p.add(textField, BorderLayout.CENTER);

        setLayout(new BorderLayout());
        add(p, BorderLayout.SOUTH);
        add(new JScrollPane(table), BorderLayout.CENTER);

        textField.getDocument().addDocumentListener(new DocumentListener()
    {
            @Override
            public void insertUpdate(DocumentEvent e) {
                String str = textField.getText();
                if (str.trim().length() == 0) {
                    sort.setRowFilter(null);
                } else {
                    //(?i) means case insensitive search
                    sort.setRowFilter(RowFilter.regexFilter("(?i)" + str));
                }
            }
            @Override
            public void removeUpdate(DocumentEvent e) {
                String str = textField.getText();
                if (str.trim().length() == 0) {
                    sort.setRowFilter(null);
                } else {
                    sort.setRowFilter(RowFilter.regexFilter("(?i)" + str));
                }
            }
            @Override
            public void changedUpdate(DocumentEvent e) {}
        });
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable(){
            public void run() {
               JFrame f = new JFrame("Search in JTable");
               f.add(new SearchInJtable());
               f.setSize(500, 180);
               f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               f.setLocationRelativeTo(null);
               f.setVisible(true);
            }
        });
    }
}

Output:

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