Question

I don't understand step 3 also can someone check if I did the setTemps method right?

Step 2: Temps Class For lab9 we will be using arrays to store the high temperatures for a given month and perform some simple statistics for them. You will create a Temps class to store the values and perform the calculations. (Data that you use for this lab was obtained from the national weather service and city‐data.com – from June 2004)

Create a new class called Temps. This class has the following instance variables:

• a String named monthName
• an int named year
• an array of ints called temps.

Write the following methods:

• public Temps(String monthName, int year)- This constructor sets the year and the name of the month to the values of the input parameters. You will not do anything to temps in the constructor.

• public void setTemps (String tempStr) to set the values into the array temps using the string parameter.
  • Use the split method to break apart the parameter into an array. Notice that the string contains several temperature values separated by commas.

Example: String [] aux = tempStr.split(",");

• Then instantiate the array temps (why here and now?)
• Use a loop to place the values of the aux array created above into the array temps.

Example: Converting the first entry of the aux array into an int and assigning the value to the first position of temps.

temps [0] = Integer.parseInt(aux[0]);

• public double getAverage() - calculate and return the average temperature for all the values currently in temps.

• public int getHighest() - find and return the highest value in temps.

• public int getLowest() - find and return the lowest value in temps.

• public String toString() - return a formatted string with the stats like the sample results below.

The average high temperature for June, 2004 was: 75.37

The high temperature for June, 2004 was: 90

The lowest high temperature for June, 2004 was: 63

• public void printTemps() – prints all the temperatures – 1 line per each day – see sample output

Daily Temperatures

==================

Day 1: 73ºF

Day 2: 68ºF

Day 3: 74ºF

.

.

.

Day 30: 76ºF

Step 3: Create the main method

The main method could be included in the Temps class or you could create another class – the driver class - if you prefer that.

1. Declare and instantiate a Temps type object (give it the name temperatures) pass the parameters "June" and 2004.

2. Use the object created in the previous step to invoke the setTemps method, passing the following string as parameter.

"73,68,74,74,77,81,85,90,85,72,63,74,83,80,81,81,79,79,69,71,69,70,75,70,68,70,73,72,79,76"

3. Invoke the method printTemps.

4. Print out the object using the toString method.

public class Temps {
private String monthName;
private int year;
private int [] temps;
private int highest;
private int lowest;
private int total;
private String output;
private String [] aux;

public Temps () {
monthName = "June";
year = 2004;
highest = 0;
lowest = 0;
total = 0;
}

public Temps (String monthName, int year) {
this.monthName = monthName;
this.year = year;

}

public void setTemps (String tempStr) {
temps = new int [31];
String [] aux = tempStr.split(",");
for(int i = 0; i < temps.length; i++) {
temps [i] = Integer.parseInt(aux[0]);
}
}

public int getAverage() {
for(int i = 0; i < temps.length; i++){
total = total + temps[i];
}
return total / temps.length;
}

public int getHighest() {
int highest = temps[0];
for (int i = 1; i < temps.length; i++) {
if (temps[i] > highest) {
highest = temps[i];
}
}
return highest;
}

public int getlowest() {
int lowest = temps[0];
for (int i = 1; i < temps.length; i++) {
if (temps[i] < lowest) {
lowest = temps[i];
}
}
return lowest;
}

public String toString() {
for (int i = 1; i < temps.length; i++) {
String output = String.format("The average high temperature for " + monthName + "," + year + "was: " + (total / temps.length) +
"\n" + "The high temperature for " + monthName + "," + year + "was: " + highest +
"\n" + "The lowest high temperature for " + monthName + "," + year + "was: " + lowest);
}
return output;
}

public void printTemps() {
for (int i = 0; i < temps.length; i++) {
System.out.println("Daily Temperatures ");
System.out.println("================== ");
System.out.println("Day " + (i + 1) + ": " + temps + " F");

}
}
}

Answer 1

Step 3 is asking you to create a driver class which is a class that contains the main() method and demonstrates the methods in the other class (Temps). I created a class named "Main" which follows the instruction in step 3. There were tiny logical errors in the printTemps() and setTemps(), so i corrected those. however, I haven't checked rest of the methods

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//-------------------OUTPUT------------------------------------------

//-----------------------------------------------------------------------

public class Main {

    public static void main(String[] args) {

        Temps t=new Temps("June", 2004);

        t.setTemps("73,68,74,74,77,81,85,90,85,72,63,74,83,80,81,81,79,79,69,71,69,70,75,70,68,70,73,72,79,76");

        t.printTemps();

    }

}

class Temps {

    private String monthName;

    private int year;

    private int[] temps;

    private int highest;

    private int lowest;

    private int total;

    private String output;

    private String[] aux;

    public Temps() {

        monthName = "June";

        year = 2004;

        highest = 0;

        lowest = 0;

        total = 0;

    }

    public Temps(String monthName, int year) {

        this.monthName = monthName;

        this.year = year;

    }

    public void setTemps(String tempStr) {

        

        String[] aux = tempStr.split(",");

        temps = new int[aux.length];

        for (int i = 0; i < aux.length; i++) {

            temps[i] = Integer.parseInt(aux[i]);

        }

    }

    public int getAverage() {

        for (int i = 0; i < temps.length; i++) {

            total = total + temps[i];

        }

        return total / temps.length;

    }

    public int getHighest() {

        int highest = temps[0];

        for (int i = 1; i < temps.length; i++) {

            if (temps[i] > highest) {

                highest = temps[i];

            }

        }

        return highest;

    }

    public int getlowest() {

        int lowest = temps[0];

        for (int i = 1; i < temps.length; i++) {

            if (temps[i] < lowest) {

                lowest = temps[i];

            }

        }

        return lowest;

    }

    public String toString() {

        for (int i = 1; i < temps.length; i++) {

            String output = String.format("The average high temperature for " + monthName + "," + year + "was: "

                    + (total / temps.length) + "\n" + "The high temperature for " + monthName + "," + year + "was: "

                    + highest + "\n" + "The lowest high temperature for " + monthName + "," + year + "was: " + lowest);

        }

        return output;

    }

    public void printTemps() {

        System.out.println("Daily Temperatures ");

        System.out.println("================== ");

        for (int i = 0; i < temps.length; i++) {

            

            System.out.println("Day " + (i + 1) + ": " + temps[i] + " F");

        }

    }

}