Initial commit

Uebung08Wetterstation.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+

src/de/itstall/Main.java

+package de.itstall;
+
+/**
+ * Output Wetterstation results
+ */
+public class Main {
+
+    /**
+     * Main method.
+     * Initialize variables and starts other methods and functions
+     *
+     * @param args
+     */
+    public static void main(String[] args) {
+        /* initialize and fill variables */
+        int[][] iTemperatures = new int[2][];
+        int[] days = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14};
+        int[] daysTemp = {12, 14, 9, 12, 15, 16, 15, 15, 11, 8, 13, 13, 15, 12};
+        iTemperatures[0] = days;
+        iTemperatures[1] = daysTemp;
+
+        /* get average temperature */
+        double iAverage = tempAverage(iTemperatures);
+        System.out.printf("Average temperature: %.2f\n", iAverage);
+
+        /* get min and max temperatures */
+        int[] iMinMaxTemperatures = calculateMinMaxTemperature(iTemperatures);
+        System.out.println("Max temperature: " + iMinMaxTemperatures[0]);
+        System.out.println("Min temperature: " + iMinMaxTemperatures[1]);
+
+        /* calculate turnabout */
+        calculateTurnabout(iTemperatures);
+
+        /* print all days and there temperatures */
+        printTemperatures(iTemperatures);
+    }
+
+    /**
+     * calculate the average temperature for given array
+     * @param temperatures : int[] : temperatures array
+     * @return averageTemperature : int
+     */
+    private static double tempAverage(int[][] temperatures) {
+        /* initialize and fill variables */
+        double averageTemperature = 0;
+        int tempAverage = 0;
+
+        /* loop through the temperatures and get biggest average */
+        for(int i = 0; i < temperatures[1].length; i++) {
+            tempAverage = tempAverage + temperatures[1][i];
+        }
+
+        /* set average temperature */
+        averageTemperature = tempAverage / (double)temperatures[1].length;
+
+        /* return average temperature */
+        return averageTemperature;
+    }
+
+    /**
+     * calculates the min and max temperatures
+     * @param temperatures : int[] : temperatures array
+     * @return iReturn : int[]
+     */
+    private static int[] calculateMinMaxTemperature(int[][] temperatures) {
+        /**
+         * iRetur[0]  = max temperature
+         * iReturn[1] = min temperature
+         */
+        int[] iReturn = {0, 0};
+
+        /* search for min and max temperature */
+        for(int i = 0; i < temperatures[1].length; i++) {
+            /* if current element is bigger than the old max temp */
+            if(temperatures[1][i] > iReturn[0]) {
+                iReturn[0] = temperatures[1][i];
+            } else if(i == 0) {
+                iReturn[0] = temperatures[1][i];
+            }
+            /* if current element is smaller than the old min temp */
+            if(temperatures[1][i] < iReturn[1]) {
+                iReturn[1] = temperatures[1][i];
+            } else if(i == 0) {
+                iReturn[1] = temperatures[1][i];
+            }
+        }
+
+        /* return the min and max values */
+        return iReturn;
+    }
+
+    /**
+     * calculates the biggest temperature turnabout and prints the result to stdout
+     * @param temperatures : int[] : temperatures array
+     */
+    private static void calculateTurnabout(int[][] temperatures) {
+        /* initialize and fill variables */
+        int maxTempTurnabout = 0;
+        int dayOfMaxTurnabout = 0;
+
+        /* loop through  all temperatures */
+        for (int i = 0; i < temperatures[1].length; i++) {
+            int newMaxTurnabout = 0;
+
+            if ((i + 1) < temperatures[1].length) {
+
+                /* temperature from next day is bigger than current */
+                if (temperatures[1][i] < temperatures[1][i + 1]) {
+                    newMaxTurnabout = temperatures[1][i + 1] - temperatures[1][i];
+                }
+
+                /* temperature from next day is smaller or same than current */
+                if (temperatures[1][i] >= temperatures[1][i + 1]) {
+                    newMaxTurnabout = temperatures[1][i] - temperatures[1][i + 1];
+                }
+
+                /* new max turnabout is bigger that the old one */
+                if (maxTempTurnabout < newMaxTurnabout) {
+                    maxTempTurnabout = newMaxTurnabout;
+                    dayOfMaxTurnabout = i + 1;
+                }
+            }
+        }
+
+        /* if a turnabout is found, print it to stdout */
+        if(maxTempTurnabout != 0) {
+            System.out.println("Biggest turnabout: " + maxTempTurnabout + " between days " + (dayOfMaxTurnabout + 1) + " and " + (dayOfMaxTurnabout + 2));
+        } else {
+            System.out.println("No temperature diff found.");
+        }
+    }
+
+    /**
+     * prints the temperatures to stdout
+     * @param temperatures
+     */
+    private static void printTemperatures(int[][] temperatures) {
+        /* print header to stdout */
+        System.out.println();
+        System.out.println("Temperatures per day: ");
+
+        /* print days to stdout */
+        System.out.print("Day:\t");
+        for(int i = 0; i < temperatures[0].length; i++) {
+            System.out.print(temperatures[0][i] + "\t");
+        }
+        System.out.println();
+
+        /* print temperatures to stdout */
+        System.out.print("Temp:\t");
+        for(int i = 0; i < temperatures[1].length; i++) {
+            System.out.printf("%2s\t", temperatures[1][i]);
+        }
+    }
+}