How do I allow row or column selection in JTable?

By Wayan in Swing 0 Comment

To allow a row selection or a column selection or both row and column selection in JTable component we can turn it on and off by calling the JTable‘s setRowSelectionAllowed() and JTable‘s setColumnSelectionAllowed() methods.

Both of these methods accept a boolean value indicating whether the selection is allowed or not allowed. Setting both of them to true allow us to select rows and columns from JTable.

package org.kodejava.swing;

import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumnModel;
import java.awt.*;

public class TableAllowColumnSelection extends JPanel {
    public TableAllowColumnSelection() {
        initializePanel();
    }

    public static void showFrame() {
        JPanel panel = new TableAllowColumnSelection();
        panel.setOpaque(true);

        JFrame frame = new JFrame("JTable Column Selection");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(TableAllowColumnSelection::showFrame);
    }

    private void initializePanel() {
        this.setLayout(new BorderLayout());
        this.setPreferredSize(new Dimension(500, 500));

        JTable table = new JTable(new PremiereLeagueTableModel());
        TableColumnModel columnModel = table.getColumnModel();
        columnModel.getColumn(0).setPreferredWidth(200);

        // setting to false disallow row selection in the table model
        table.setRowSelectionAllowed(false);

        // setting to true allow column selection in the table model
        table.setColumnSelectionAllowed(true);

        JScrollPane pane = new JScrollPane(table);
        this.add(pane, BorderLayout.CENTER);
    }

    static class PremiereLeagueTableModel extends AbstractTableModel {
        // TableModel's column names
        private final String[] columnNames = {
                "CLUB", "MP", "W", "D", "L", "GF", "GA", "GD", "PTS"
        };

        // TableModel's data
        private final Object[][] data = {
                {"Chelsea", 8, 6, 1, 1, 16, 3, 13, 19},
                {"Liverpool", 8, 5, 3, 0, 22, 6, 16, 18},
                {"Manchester City", 8, 5, 2, 1, 16, 3, 13, 17},
                {"Brighton", 8, 4, 3, 1, 8, 5, 3, 15},
                {"Tottenham", 8, 5, 0, 3, 9, 12, -3, 15}
        };

        @Override
        public int getRowCount() {
            return data.length;
        }

        @Override
        public int getColumnCount() {
            return columnNames.length;
        }

        @Override
        public String getColumnName(int column) {
            return columnNames[column];
        }

        @Override
        public Class<?> getColumnClass(int columnIndex) {
            return getValueAt(0, columnIndex).getClass();
        }

        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            return data[rowIndex][columnIndex];
        }
    }
}
JTable Row and Column Selection

JTable Row and Column Selection

Wayan
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