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import java.util.ArrayList;
class Trial {
private int trialNum;
private double temperature;
private String compoundName;
private double amountUsed;
public Trial(int num, double temp, String compound, double amt){
trialNum = num;
temperature = temp;
compoundName = compound;
amountUsed = amt;
}
public int getTrialNum(){ return trialNum; }
public double getTemp(){ return temperature; }
public String getCompound(){ return compoundName; }
public double getAmtUsed(){ return amountUsed; }
}
class ScienceExperiment {
private ArrayList<Trial> trialList;
public double getCompoundAvg(String comp){
int ct = 0;
double totalTemp = 0;
for (Trial trial : trialList){
if (trial.getCompound() != comp) continue;
ct++;
totalTemp += trial.getTemp();
}
if (ct > 0) return totalTemp/ct;
else return -1;
}
public ArrayList<String> getCompoundList(){
ArrayList<String> out = new ArrayList<String>();
for (Trial trial : trialList){
if (!out.contains(trial.getCompound()))
out.add(trial.getCompound());
}
return out;
}
public String getCompoundWithHighestAvg(){
double max = -1; // less than all non-negative temperatures.
String compound = ""; // to make java behave
for (String curCompound : getCompoundList()){
double avg = getCompoundAvg(curCompound);
if (avg > max){
max = avg;
compound = curCompound;
}
}
return compound;
}
public void add(Trial trial){
trialList.add(trial);
}
public ScienceExperiment(){
trialList = new ArrayList<Trial>();
}
public double getCompoundAmountUsed(String compound){
double sum = 0;
for (Trial trial : trialList){
if (trial.getCompound() == compound)
sum += trial.getAmtUsed();
}
return sum;
}
}
public class QuestionOne {
public static void main(String[] args){
ScienceExperiment exp = new ScienceExperiment();
exp.add(new Trial(1,70,"alkynes",1));
exp.add(new Trial(27,100,"ketones",15));
exp.add(new Trial(29,80,"ketones",2));
exp.add(new Trial(35,90,"ethers",3));
System.out.println(exp.getCompoundAvg("alkynes"));
System.out.println(exp.getCompoundAvg("ketones"));
System.out.println(exp.getCompoundAvg("thiol"));
System.out.println(exp.getCompoundAmountUsed("ketones"));
System.out.println(exp.getCompoundWithHighestAvg());
}
}
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