In Java, you can create an editable JTable component by setting the editable property of the DefaultTableModel to true.

Here's an example that demonstrates how to create an editable JTable:

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class EditableTableExample {
    public static void main(String[] args) {
        String[] columnNames = {"Name", "Age", "Gender"};
        Object[][] rowData = {
            {"Alice", 25, "Female"},
            {"Bob", 30, "Male"},
            {"Charlie", 35, "Male"}
        };
        DefaultTableModel model = new DefaultTableModel(rowData, columnNames);
        JTable table = new JTable(model);
        table.setEnabled(true);
        table.setEditable(true);
        JScrollPane scrollPane = new JScrollPane(table);
        JPanel panel = new JPanel();
        panel.add(scrollPane);
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(panel);
        frame.pack();
        frame.setVisible(true);
    }
}

In this example, we create a JTable by using a DefaultTableModel that contains the data and column names for the table. We then set the editable property of the table to true using the setEditable() method.

Finally, we create a JScrollPane to hold the JTable, add it to a JPanel, and then add the panel to a JFrame to display the table.

Once the table is created, you can edit its contents by double-clicking on a cell and typing in a new value. You can also programmatically modify the data in the table by calling the appropriate methods on the DefaultTableModel instance.