What characteristics need to be implemented in a class for it to serve as a data table?

For a class to serve as a data table, it must have the following characteristics:

• Store data in a structured form, such as a list of objects or an array.
• Provide access to data by rows and columns (e.g., methods to get a value by row index and column name or index).
• Support operations for adding, deleting, and updating data.
• If necessary, implement interfaces that allow integration with UI components, such as TableModel in Swing.

Example of a simple class representing a data table:

import java.util.ArrayList;
import java.util.List;

public class DataTable {
    private List<String[]> rows = new ArrayList<>();
    private String[] columns;

    public DataTable(String[] columns) {
        this.columns = columns;
    }

    public void addRow(String[] row) {
        if(row.length == columns.length) {
            rows.add(row);
        } else {
            throw new IllegalArgumentException("Incorrect number of columns");
        }
    }

    public String getValueAt(int rowIndex, int columnIndex) {
        return rows.get(rowIndex)[columnIndex];
    }

    public int getRowCount() {
        return rows.size();
    }

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

    public String getColumnName(int index) {
        return columns[index];
    }
}