การปรับโครงสร้างตาราง

public class ModifyWeatherTable {
    public static void main(String[] args) {
        StringColumn days = StringColumn.create("Day", 
            "Monday", "Tuesday", "Wednesday");
            
        DoubleColumn temperatures = DoubleColumn.create("Temperature", 
            22.5, 24.0, 23.2);
            
        DoubleColumn precipitation = DoubleColumn.create("Precipitation", 
            0.0, 2.5, 5.2);
            
        Table weatherData = Table.create("WeatherData")
            .addColumns(days, temperatures, precipitation);
        
        // Rename the Temperature column
        weatherData.____("Temperature").____("____");
        
        // Add a new ForecastTemp column
        DoubleColumn forecastTemps = DoubleColumn.create("ForecastTemp", 
            23.0, 25.2, 22.8);
        weatherData = weatherData.____(forecastTemps);
        
        // Print the table structure
        System.out.println(weatherData.____());
        
        // Print the first three rows
        System.out.println(weatherData.____(____));
        
    }
}