Part (a)

Write cleanData.

public void cleanData(double lower, double upper) {
    int i = 0;
    while (i < temperatures.size()) {
        Double t = temperatures.get(i);
        if (t < lower || t > upper) {
            temperatures.remove(i);
        }
        else {
            i++;
        }
    }
}

Part (b)

Write longestHeatWave.

public int longestHeatWave(double threshold) {
    int longest = 0, current = 0;
    for (Double t : temperatures) {
        if (t > threshold) {
            current++;
        }
        else {
            current = 0;
        }
        if (current > longest) {
            longest = current;
        }
    }
    return longest;
}

Key Concepts

Common Mistakes