exercitii rezolvate

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex10/Main.java

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+package com.rinftech.ExercitiiMariaTodirel.ex10;
+
+import java.util.*;
+
+public class Main {
+    public static  List<List<String>> grouping(String[] input){
+      Map<String,List<String>> groups = new HashMap<>();
+      for(String element: input){
+          char[] chars = element.toCharArray();
+          Arrays.sort(chars);
+          String sortedElement = new String(chars);
+          if(!groups.containsKey(sortedElement)){
+              groups.put(sortedElement, new ArrayList<>());
+          }
+          groups.get(sortedElement).add(element);
+      }
+
+      return new ArrayList<>(groups.values());
+    }
+    public static void main(String[] args){
+        String[] input = {"eat", "tea", "tan", "ate", "nat", "bat", "listen", "silent", "enlist", "hello", "world", "dlrow"};
+        System.out.println(grouping(input));
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex1and2/Main.java

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+package com.rinftech.ExercitiiMariaTodirel.ex1and2;
+
+
+public class Main {
+    public static int sum(int number) {
+        int sum = 0;
+        while (number != 0) {
+            sum += number % 10;
+            number /= 10;
+        }
+        return sum;
+    }
+
+    public static String count(String input) {
+        int[] counter = new int[3];
+        for(int i : counter){
+            i=0;
+        }
+        for (char letter : input.toCharArray()) {
+            if (('a' <= letter && 'z' >= letter) || ('A' <= letter && 'Z' >= letter)) {
+                counter[0]++;
+            } else if ('0' <= letter && '9' >= letter) {
+                counter[1]++;
+            } else if (letter == ' ') {
+                counter[2]++;
+            }
+        }
+        StringBuilder output = new StringBuilder();
+        output.append("Letters: ").append(counter[0]).append(", ");
+        output.append("Numbers: ").append(counter[1]).append(", ");
+        output.append("Spaces: ").append(counter[2]);
+        return output.toString();
+    }
+
+    public static void main(String[] args) {
+        System.out.println(sum(8733));
+        System.out.println(count( "The quick brown fox jumps over 42 lazy dogs"));
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex3/Employee.java

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+package com.rinftech.ExercitiiMariaTodirel.ex3;
+
+import com.rinftech.ExercitiiMariaTodirel.ex3.Person;
+
+public class Employee extends Person {
+    private  int id;
+    private String jobTitle;
+
+    public Employee(String firstName, String lastName, int id, String jobTitle) {
+        super(firstName, lastName);
+        this.id = id;
+        this.jobTitle = jobTitle;
+    }
+
+    public int getEmployeeId(){
+        return id;
+    }
+    @Override
+    public String getLastName(){
+        return super.getLastName()+", "+ jobTitle;
+    }
+
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex3/Person.java

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+package com.rinftech.ExercitiiMariaTodirel.ex3;
+
+public class Person {
+    private String firstName;
+    private String lastName;
+
+    public Person(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public String getFirstName(){
+        return firstName;
+    }
+    public String getLastName(){
+        return lastName;
+    }
+
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex4/Car.java

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+package com.rinftech.ExercitiiMariaTodirel.ex4;
+
+public class Car extends Vehicle {
+    private int numberOfSeats;
+
+    public Car(String make, String model, int year, String fuelType, int numberOfSeats) {
+        super(make, model, year, fuelType);
+        this.numberOfSeats = numberOfSeats;
+    }
+    @Override
+    public double calculateFuelEfficeincy(){
+        return 8.5;
+    }
+    @Override
+    public double calculateDistanceTraveled(double fuelConsumed){
+        return fuelConsumed*calculateFuelEfficeincy();
+    }
+    @Override
+    public int calculateMaxSpeed(){
+        return 120;
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex4/Motorcycle.java

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+package com.rinftech.ExercitiiMariaTodirel.ex4;
+
+public class Motorcycle extends Vehicle {
+    private boolean hasAttach;
+
+    public Motorcycle(String make, String model, int year, String fuelType, boolean hasAttach) {
+        super(make, model, year, fuelType);
+        this.hasAttach = hasAttach;
+    }
+    @Override
+    public double calculateFuelEfficeincy(){
+        return 9.5;
+    }
+    @Override
+    public double calculateDistanceTraveled(double fuelConsumed){
+        return fuelConsumed*calculateFuelEfficeincy();
+    }
+    @Override
+    public int calculateMaxSpeed(){
+        return 200;
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex4/Truck.java

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+package com.rinftech.ExercitiiMariaTodirel.ex4;
+
+public class Truck extends Vehicle {
+    private int maxCargoWeight;
+
+    public Truck(String make, String model, int year, String fuelType, int maxCargoWeight) {
+        super(make, model, year, fuelType);
+        this.maxCargoWeight = maxCargoWeight;
+    }
+    @Override
+    public double calculateFuelEfficeincy(){
+        return 7.5;
+    }
+    @Override
+    public double calculateDistanceTraveled(double fuelConsumed){
+        return fuelConsumed*calculateFuelEfficeincy();
+    }
+    @Override
+    public int calculateMaxSpeed(){
+        return 80;
+    }
+
+
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex4/Vehicle.java

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+package com.rinftech.ExercitiiMariaTodirel.ex4;
+
+public class Vehicle {
+    private String make;
+    private String model;
+    private int year;
+    private String fuelType;
+
+    public Vehicle(String make, String model, int year, String fuelType) {
+        this.make = make;
+        this.model = model;
+        this.year = year;
+        this.fuelType = fuelType;
+    }
+    public double calculateFuelEfficeincy(){
+        return 0.0;
+    }
+    public double calculateDistanceTraveled(double fuelConsumed){
+        return 0.0;
+    }
+    public int calculateMaxSpeed(){
+        return 0;
+    }
+
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex5/Main.java

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+package com.rinftech.ExercitiiMariaTodirel.ex5;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class Main {
+    public static List<String>findCommonElements(String[]array1, String[]array2){
+        List<String>commonElements = new ArrayList<>();
+        ArrayList<String>array2List = new ArrayList<>(Arrays.asList(array2));
+        for(String element: array1){
+            if(array2List.contains(element)){
+                commonElements.add(element);
+            }
+        }
+        return commonElements;
+    }
+    public static void main(String[] args) {
+        String[] s1={ "Python", "Java", "GoLang", "Lisp"};
+        String[] s2={"Java", "C++", "Apples", "Hamburger", "Lisp"};
+        System.out.println(findCommonElements(s1, s2));
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex6/Circle.java

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+package com.rinftech.ExercitiiMariaTodirel.ex6;
+
+public class Circle extends Shape{
+    final double PI = Math.PI;
+    private int radius;
+
+    public Circle(int radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double calculateArea(){
+        return PI * (radius^2);
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex6/Rectangle.java

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+package com.rinftech.ExercitiiMariaTodirel.ex6;
+
+public class Rectangle extends Shape{
+    private int width;
+    private int height;
+
+    public Rectangle(int width, int height) {
+        this.width = width;
+        this.height = height;
+    }
+    @Override
+    public double calculateArea(){
+        return width*height;
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex6/Shape.java

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+package com.rinftech.ExercitiiMariaTodirel.ex6;
+
+public class Shape {
+    public double calculateArea(){
+        return 0.0;
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex6/Triangle.java

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+package com.rinftech.ExercitiiMariaTodirel.ex6;
+
+public class Triangle extends Shape{
+   private int a;
+   private int b;
+   private int c;
+
+    public Triangle(int a, int b, int c) {
+        this.a = a;
+        this.b = b;
+        this.c = c;
+    }
+    @Override
+    public double calculateArea(){
+        double p=(double) (a+b+c)/2;
+        return Math.sqrt(p * (p - a) * (p - b) * (p - c));
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex7/Animal.java

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+package com.rinftech.ExercitiiMariaTodirel.ex7;
+
+public class Animal {
+    public String eat(){
+        return null;
+    }
+    public String sound(){
+        return null;
+    }
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex7/Lion.java

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+package com.rinftech.ExercitiiMariaTodirel.ex7;
+
+public class Lion extends Animal{
+    @Override
+    public String eat(){
+        return "meat";
+    }
+    @Override
+    public String sound(){
+        return "ROOOAR";
+    }
+
+
+
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex7/Panther.java

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+package com.rinftech.ExercitiiMariaTodirel.ex7;
+
+public class Panther extends Animal{
+    @Override
+    public String eat(){
+        return "meat, fish and mice";
+    }
+    @Override
+    public String sound(){
+        return "mrrr";
+    }
+
+}

JavaCourse/src/main/java/com/rinftech/ExercitiiMariaTodirel/ex7/Tiger.java

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+package com.rinftech.ExercitiiMariaTodirel.ex7;
+
+public class Tiger extends Animal{
+    @Override
+    public String eat(){
+        return "meat and fish";
+    }
+    @Override
+    public String sound(){
+        return "rooar";
+    }
+
+}