How can we prevent the re-ordering columns of a JTable in Java?

A JTable is a subclass of JComponent class and it can be used to create a table with information displayed in multiple rows and columns. When a value is selected from a JTable, a TableModelEvent is generated, which is handled by implementing a TableModelListener interface. By default, we can do the re-ordering of columns in a JTable. We can not allow the user to reorder columns by using table.getTableHeader().setReorderingAllowed() method and set the value as false.

Example

import java.awt.*;
import javax.swing.*;
public final class JTableColumnReorderingTest extends JFrame {
   JTable table;
   JScrollPane scrollPane;
   public JTableColumnReorderingTest() {
      setTitle("JTableColumnReordering Test");
      String[] columnNames = {"Name", "Mobile Number", "Course"};
      Object[][] data = {{"Raja", "123456789", "Java"}, {"Adithya", "456123789", ".Net"}, {"Vineet",       "789456123", "Java Script"}, {"Archana", "987456321", "Python"}, {"Krishna", "321456987",             "Scala"}, {"Jai", "456321789", "ServiceNow"}};
      table = new JTable(data, columnNames);
      scrollPane= new JScrollPane(table);
      table.getTableHeader().setReorderingAllowed(false); // not allow re-ordering of columns
      table.getTableHeader().setResizingAllowed(false);
      add(scrollPane);
      setSize(375, 250);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setLocationRelativeTo(null);
      setVisible(true);
   }
   public static void main(String[] args) {
      new JTableColumnReorderingTest();
   }
}

Output

raja

e

Updated on: 10-Feb-2020

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