MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.BorderLayout;
import java.awt.Color;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JViewport;
import javax.swing.ScrollPaneConstants;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;

public class MainClass extends JFrame {

    public MainClass() {
        super("Row Header Test");
        setSize(300, 200);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        TableModel tm = new AbstractTableModel() {
            String data[] = { "", "a", "b", "c", "d", "e" };

            String headers[] = { "Row #", "Column 1", "Column 2", "Column 3", "Column 4", "Column 5" };

            public int getColumnCount() {
                return data.length;
            }

            public int getRowCount() {
                return 1000;
            }

            public String getColumnName(int col) {
                return headers[col];
            }

            public Object getValueAt(int row, int col) {
                return data[col] + row;
            }
        };

        TableColumnModel cm = new DefaultTableColumnModel() {
            boolean first = true;

            public void addColumn(TableColumn tc) {
                if (first) {
                    first = false;
                    return;
                }
                tc.setMinWidth(150);
                super.addColumn(tc);
            }
        };

        TableColumnModel rowHeaderModel = new DefaultTableColumnModel() {
            boolean first = true;

            public void addColumn(TableColumn tc) {
                if (first) {
                    tc.setMaxWidth(tc.getPreferredWidth());
                    super.addColumn(tc);
                    first = false;
                }
            }
        };

        JTable jt = new JTable(tm, cm);
        JTable headerColumn = new JTable(tm, rowHeaderModel);
        jt.createDefaultColumnsFromModel();
        headerColumn.createDefaultColumnsFromModel();

        jt.setSelectionModel(headerColumn.getSelectionModel());

        headerColumn.setBackground(Color.lightGray);
        headerColumn.setColumnSelectionAllowed(false);
        headerColumn.setCellSelectionEnabled(false);

        JViewport jv = new JViewport();
        jv.setView(headerColumn);
        jv.setPreferredSize(headerColumn.getMaximumSize());

        jt.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

        JScrollPane jsp = new JScrollPane(jt);
        jsp.setRowHeader(jv);
        jsp.setCorner(ScrollPaneConstants.UPPER_LEFT_CORNER, headerColumn.getTableHeader());
        getContentPane().add(jsp, BorderLayout.CENTER);
    }

    public static void main(String args[]) {
        new MainClass().setVisible(true);
    }
}