How to Populate a JTable from a ResultSet in Java?

Populating a JTable from ResultSet

As described in the Java documentation, the JTable constructor accepts a TableModel as an argument. This means that you can use the DefaultTableModel class to create a table model based on a ResultSet.

Here's an example of how to do this:

ResultSet rs = stmt.executeQuery("select * from product_info");
JTable table = new JTable(new DefaultTableModel(buildTableModel(rs), columnNames));

The buildTableModel method takes a ResultSet as an argument and returns a TableModel object. Here's an example of how to implement this method:

public static DefaultTableModel buildTableModel(ResultSet rs)
        throws SQLException {

    ResultSetMetaData metaData = rs.getMetaData();

    // names of columns
    Vector<String> columnNames = new Vector<String>();
    int columnCount = metaData.getColumnCount();
    for (int column = 1; column <= columnCount; column++) {
        columnNames.add(metaData.getColumnName(column));
    }

    // data of the table
    Vector<Vector<Object>> data = new Vector<Vector<Object>>();
    while (rs.next()) {
        Vector<Object> vector = new Vector<Object>();
        for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
            vector.add(rs.getObject(columnIndex));
        }
        data.add(vector);
    }

    return new DefaultTableModel(data, columnNames);

}

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