Need help on array list.

Question

* Write an application that reads daily temperatures for 12 months and allows
* the user to get statistics. Support at least three options: monthly average
* of a given month, yearly average, and lowest and highest temperatures of a
* given month. Use a text file to store temperatures. A line in the text file
* contains daily temperatures for one month. The first line in the text file
* contains temperatures for January; the second line, those for February; and
* so forth. Using StringTokenizer to parse a line into temperatures of type
* float. For a data structure, consider using either an array of Month or a
* two-dimensional array of float. Month is a class you define yourself.
import java.io.*;
import java.util.*;
import java.text.*;
class homeWork6 {
    public static void main( String[] args) throws IOException {
        File inFile = new File("templog.txt");
        FileReader fileReader = new FileReader(inFile);
        BufferedReader bufReader = new BufferedReader(fileReader);
        DecimalFormat df = new DecimalFormat("0.00");
        float[] days = new float[31];
        String[] monthName = { "Jan", "Feb", "Mar", "Apr", "May", "June",
        "July", "Aug", "Sept", "Oct", "Nov", "Dec" };
        float min = 0, max = 0, avgy = 0, sumy = 0;
        for(int i = 0; i < 12; i++) {
            String str = bufReader.readLine();
            StringTokenizer parser = new StringTokenizer(str);
            int count = 0;
            while(parser.hasMoreTokens()) {
                String next = parser.nextToken();
                float newvar = Float.parseFloat(next);
                days [count]= newvar;
                count++;
            Month data;
            data = new Month();
            max = days[0];
            min = days[0];
            for(int j = 0; j < 31; j++) {
                data.setTemp(days[j]);
                //System.out.println(data.getTemp());
                if (max < days[j]){
                    max = days[j];
                data.setMax(max);
                if (min > days[j]){
                    min = days[j];
                data.setMin(min);
            System.out.println(monthName[i] + ": AVG = " + df.format(data.getAvgM()) + " MIN = " + df.format(data.getMin()) + " MAX = " + df.format(data.getMax()));
            sumy += data.getAvgM();
        avgy = sumy / 12;
        System.out.println("Yearly: AVG = " + df.format(avgy));
/*        Scanner scanner = new Scanner(System.in);
        System.out.println("Home Work 6");
        System.out.println("Please choose one of the following options:");
        System.out.println("(1) Monthly Average");
        System.out.println("(2) Monthly Lowest/Highest");
        System.out.println("(3) Yearly Average");
        System.out.println("");
        int answer = scanner.nextInt();
        if (answer == 1){
            System.out.println("Monthly AVG List");
        else if (answer == 2){
            System.out.println("Monthly MIN/MAX List");
        else{
            System.out.println("Yearly Average is: " + df.format(avgy));
        bufReader.close();
class Month {
    float temp, summ, avgm, sumy, avgy, min1, max1;
    public void setTemp(float days) {
        temp = days;
        summ += temp;
    public void setMax(float max) {
        max1 = max;
    public void setMin(float min) {
        min1 = min;
    public float getTemp() {
        return temp;
    public float getAvgM() {
        avgm = summ / 31;
        return avgm;
    public float getMax() {
        return max1;
    public float getMin() {
        return min1;
}My question is, how do I make the AVG, MIN, & MAX data show up on this lines.
        if (answer == 1){
            System.out.println("Monthly AVG List");
        else if (answer == 2){
            System.out.println("Monthly MIN/MAX List");
        }Please give me a hint! Or lead me the right way, thanks!

Answer 1

At the end of your "FOR" loop, immediately after populating "sumy" variable, you can populate an "Array" of Monthly Averages" by calling the same method "data.getAvgM(). This array has to be declared outside the loop (at the beginning of the class). Then, you can iterate through this array and print out the values at the location you want (when the answer == 1).
Likewise, you can print the Monthly Min and Max too.
Hope this helps.