Array/Arraylist HW

[SGTech08]

Part I

public void cleanData (double lower, double upper) {
for (int i = temperature.size() - 1; i>= 0; i--) {
if (temperatures.get(i) < lower || temperatures.get(i) > upper) {
// Remove the temperature if it is below the lower bound or above the upper bound
temperatures.remove(i);
}
}
}

This allows for a range of values. If they are outside the bound the temperature gets removed.

Part II

import java.util.ArrayList;

public class WeatherData {

// Instance variable to store the list of temperature readings.
private ArrayList<Double> temperatureRecords;

/**
 * Removes temperature readings that are outside the specified valid range [lowerBound, upperBound].
 *
 * @param lowerBound the inclusive lower limit of valid temperatures
 * @param upperBound the inclusive upper limit of valid temperatures
 */
public void filterData(double lowerBound, double upperBound) {
    // Traverse the list in reverse to avoid skipping elements during removal.
    for (int i = temperatureRecords.size() - 1; i >= 0; i--) {
        // Remove temperatures outside the valid range.
        if (temperatureRecords.get(i) < lowerBound || temperatureRecords.get(i) > upperBound) {
            temperatureRecords.remove(i);
        }
    }
}

/**
 * Finds the longest sequence of consecutive days with temperatures exceeding a specified threshold.
 *
 * @param threshold the temperature level that defines a heat wave
 * @return the maximum number of consecutive days with temperatures above the threshold
 */
public int findLongestHeatWave(double threshold) {
    int currentStreak = 0;  // Tracks the current number of consecutive heat wave days.
    int longestStreak = 0;  // Tracks the longest streak of consecutive heat wave days.

    // Iterate through the temperature records.
    for (double temp : temperatureRecords) {
        if (temp > threshold) {
            // Increase the current streak if the temperature exceeds the threshold.
            currentStreak++;
            // Update the longest streak if the current streak is greater.
            if (currentStreak > longestStreak) {
                longestStreak = currentStreak;
            }
        } else {
            // Reset the current streak if the temperature does not exceed the threshold.
            currentStreak = 0;
        }
    }
    // Return the longest recorded streak.
    return longestStreak;
}

}