added micro lab

src/learn/MicroLabTask1.java

@@ -0,0 +1,31 @@
+package learn;
+
+public class MicroLabTask1 {
+    public static int countE(String[] strings) {
+        int count = 0;
+        for (String s : strings) {
+            for (char c: s.toCharArray()) {
+                if (c == 'e') {
+                    count++;
+                }
+            }
+        }
+        return count;
+    }
+
+    public static <T extends Comparable<T>> int findFirstOutOfPlace(T[] arr) {
+        for (int i = 0; i < arr.length - 1; i++) {
+            if (arr[i+1].compareTo(arr[i]) < 0) {
+                return i;
+            }
+        }
+
+        return -1;
+    }
+
+    public static void main(String[] args) {
+        System.out.println(countE(new String[]{"hello", "my", "dear", "friend", "and", "enemies"}));
+        System.out.println(findFirstOutOfPlace(new Integer[]{0,1,2,3}));
+        System.out.println(findFirstOutOfPlace(new Integer[]{0,1,3,2}));
+    }
+}

src/learn/MicroLabTask2.java

@@ -0,0 +1,45 @@
+package learn;
+
+class Car {
+    int speed;
+    String brand;
+
+    Car(int speed, String brand) {
+        this.speed = speed;
+        this.brand = brand;
+    }
+
+    @Override
+    public String toString() {
+        return "Car{speed=" + speed + "km/h, brand='" + brand + "'}";
+    }
+}
+
+class Person {
+    String firstname;
+    String lastname;
+    int age;
+    int height;
+
+    Person(String firstname, String lastname, int age, int height) {
+        this.firstname = firstname;
+        this.lastname = lastname;
+        this.age = age;
+        this.height = height;
+    }
+
+    Person(String firstname) {
+        this(firstname, "", 0, 0);
+    }
+}
+
+public class MicroLabTask2 {
+    public static void main(String[] args) {
+        Car car1 = new Car(250, "Porsche 911");
+        System.out.println(car1);
+
+        Person p = new Person("Homer");
+        String v = p.lastname.toUpperCase();
+        System.out.println(v);
+    }
+}

src/learn/MicroLabTask3.java

@@ -0,0 +1,34 @@
+package learn;
+
+class Printer {
+    private static int totalNumberOfPrinters = 0;
+    private String printerName;
+
+    Printer(String name) {
+        this.printerName = name;
+        totalNumberOfPrinters++;
+    }
+
+    public boolean setPrinterName(String printerName) {
+        boolean different = !this.printerName.equals(printerName);
+        this.printerName = printerName;
+        return different;
+    }
+
+    public static int getTotalNumberOfPrinters() {
+        return totalNumberOfPrinters;
+    }
+
+    private void toLowerCase() {
+        this.printerName = this.printerName.toLowerCase();
+    }
+}
+
+public class MicroLabTask3 {
+    public static void main(String[] args) {
+        Printer p1 = new Printer("First printer");
+        Printer p2 = new Printer("Printer the Second");
+        Printer p3 = new Printer("Printerus III");
+        System.out.println(Printer.getTotalNumberOfPrinters());
+    }
+}