diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..13566b8 --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,8 @@ +# Default ignored files +/shelf/ +/workspace.xml +# Editor-based HTTP Client requests +/httpRequests/ +# Datasource local storage ignored files +/dataSources/ +/dataSources.local.xml diff --git a/.idea/compiler.xml b/.idea/compiler.xml new file mode 100644 index 0000000..74a90eb --- /dev/null +++ b/.idea/compiler.xml @@ -0,0 +1,13 @@ + + + + + + + + + + + + + \ No newline at end of file diff --git a/.idea/encodings.xml b/.idea/encodings.xml new file mode 100644 index 0000000..8f47e5a --- /dev/null +++ b/.idea/encodings.xml @@ -0,0 +1,7 @@ + + + + + + + \ No newline at end of file diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml new file mode 100644 index 0000000..712ab9d --- /dev/null +++ b/.idea/jarRepositories.xml @@ -0,0 +1,20 @@ + + + + + + + + + + + \ No newline at end of file diff --git a/.idea/java-course.iml b/.idea/java-course.iml new file mode 100644 index 0000000..cf6b305 --- /dev/null +++ b/.idea/java-course.iml @@ -0,0 +1,12 @@ + + + + + + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 0000000..0ee0ea1 --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,15 @@ + + + + + + + + + + \ No newline at end of file diff --git a/.idea/modules.xml b/.idea/modules.xml new file mode 100644 index 0000000..edb5d78 --- /dev/null +++ b/.idea/modules.xml @@ -0,0 +1,8 @@ + + + + + + + + \ No newline at end of file diff --git a/.idea/sonarlint/issuestore/0/7/07aec024d050b8e8f89abefe26c85019f79c8fb4 b/.idea/sonarlint/issuestore/0/7/07aec024d050b8e8f89abefe26c85019f79c8fb4 new file mode 100644 index 0000000..c6686f6 --- /dev/null +++ b/.idea/sonarlint/issuestore/0/7/07aec024d050b8e8f89abefe26c85019f79c8fb4 @@ -0,0 +1,2 @@ + +? java:S106"+Replace this use of System.out by a logger.(男 \ No newline at end of file diff --git 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b/JavaCourse/src/main/java/com/rinftech/practice/eight/Solution.java new file mode 100644 index 0000000..df4cd5a --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/eight/Solution.java @@ -0,0 +1,23 @@ +package com.rinftech.practice.eight; + +import java.util.ArrayList; +import java.util.List; + +public class Solution { + public static void main(String[] args) { + List list = new ArrayList<>(); + list.add("Red"); + list.add("Green"); + list.add("Black"); + list.add("White"); + list.add("Pink"); + int firstIndex = 1; + int secondIndex = 4; + + String aux = list.get(firstIndex); + list.set(firstIndex, list.get(secondIndex)); + list.set(secondIndex, aux); + + System.out.println("The modified list: " + list); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/five/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/five/Solution.java new file mode 100644 index 0000000..66a9680 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/five/Solution.java @@ -0,0 +1,26 @@ +package com.rinftech.practice.five; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; + +public class Solution { + public static void main(String[] args) { + String [] firstArray = { "Python", "Java", "GoLang", "Lisp" }; + String [] secondArray = { "Java", "C++", "Apples", "Hamburger", "Lisp" }; + + String [] resultArray = findCommonElements(firstArray, secondArray); + System.out.println("Common elements:"); + for (String element : resultArray) + System.out.println(element); + + } + + public static String[] findCommonElements(String[] firstArray, String[] secondArray) { + List auxList = new ArrayList<>(); + for (String s : firstArray) + if (Arrays.asList(secondArray).contains(s)) + auxList.add(s); + return auxList.toArray(new String[0]); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/four/Car.java b/JavaCourse/src/main/java/com/rinftech/practice/four/Car.java new file mode 100644 index 0000000..f25fb9e --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/four/Car.java @@ -0,0 +1,7 @@ +package com.rinftech.practice.four; + +public class Car extends Vehicle{ + public Car(String make, String model, int year, String fuelType) { + super(make, model, year, fuelType); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/four/Motorcycle.java b/JavaCourse/src/main/java/com/rinftech/practice/four/Motorcycle.java new file mode 100644 index 0000000..d9a3e65 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/four/Motorcycle.java @@ -0,0 +1,7 @@ +package com.rinftech.practice.four; + +public class Motorcycle extends Vehicle{ + public Motorcycle(String make, String model, int year, String fuelType) { + super(make, model, year, fuelType); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/four/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/four/Solution.java new file mode 100644 index 0000000..cd067e8 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/four/Solution.java @@ -0,0 +1,33 @@ +package com.rinftech.practice.four; + +public class Solution { + public static void main(String[] args) { + Truck truck = new Truck("Man", "TGX", 2005, "gas"); + double truckFuelEfficiency = truck.calculateFuelEfficiency(100, 12.5); + System.out.println(truck.getMake() + " " + truck.getModel() + " fuel efficiency = " + truckFuelEfficiency); + double truckDistanceTravelled = truck.calculateDistanceTraveled(100, 3); + System.out.println(truck.getMake() + " " + truck.getModel() + " distance travelled = " + truckDistanceTravelled); + double truckMaxSpeed = truck.calculateMaximumSpeed(20, 1.2); + System.out.println(truck.getMake() + " " + truck.getModel() + " max speed = " + truckMaxSpeed); + + System.out.println(); + + Car car = new Car("BMW", "M5", 2020, "diesel"); + double carFuelEfficiency = car.calculateFuelEfficiency(123.44, 8.5); + System.out.println(car.getMake() + " " + car.getModel() + " fuel efficiency = " + carFuelEfficiency); + double carDistanceTravelled = car.calculateDistanceTraveled(170, 2); + System.out.println(car.getMake() + " " + car.getModel() + " distance travelled = " + carDistanceTravelled); + double carMaxSpeed = car.calculateMaximumSpeed(50, 0.6); + System.out.println(car.getMake() + " " + car.getModel() + " max speed = " + carMaxSpeed); + + System.out.println(); + + Motorcycle motorcycle = new Motorcycle("Harley", "Davidson", 2015, "gas"); + double motorcycleFuelEfficiency = motorcycle.calculateFuelEfficiency(150, 11.5); + System.out.println(motorcycle.getMake() + " " + motorcycle.getModel() + " fuel efficiency = " + motorcycleFuelEfficiency); + double motorcycleDistanceTravelled = motorcycle.calculateDistanceTraveled(90, 5); + System.out.println(motorcycle.getMake() + " " + motorcycle.getModel() + " distance travelled = " + motorcycleDistanceTravelled); + double motorcycleMaxSpeed = motorcycle.calculateMaximumSpeed(30, 1.3); + System.out.println(motorcycle.getMake() + " " + motorcycle.getModel() + " max speed = " + motorcycleMaxSpeed); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/four/Truck.java b/JavaCourse/src/main/java/com/rinftech/practice/four/Truck.java new file mode 100644 index 0000000..d912630 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/four/Truck.java @@ -0,0 +1,10 @@ +package com.rinftech.practice.four; + +public class Truck extends Vehicle{ + + public Truck(String make, String model, int year, String fuelType) { + super(make, model, year, fuelType); + } + + +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/four/Vehicle.java b/JavaCourse/src/main/java/com/rinftech/practice/four/Vehicle.java new file mode 100644 index 0000000..57a9b28 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/four/Vehicle.java @@ -0,0 +1,69 @@ +package com.rinftech.practice.four; + +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 String getMake() { + return make; + } + + public void setMake(String make) { + this.make = make; + } + + public String getModel() { + return model; + } + + public void setModel(String model) { + this.model = model; + } + + public int getYear() { + return year; + } + + public void setYear(int year) { + this.year = year; + } + + public String getFuelType() { + return fuelType; + } + + public void setFuelType(String fuelType) { + this.fuelType = fuelType; + } + + public double calculateFuelEfficiency(double distance, double fuelConsumed) { + return distance / fuelConsumed; + } + + public double calculateDistanceTraveled(double speed, double time) { + return speed * time; + } + + public double calculateMaximumSpeed(double acceleration, double distance) { + return Math.sqrt(acceleration * distance); + } + + @Override + public String toString() { + return "Vehicle{" + + "make='" + make + '\'' + + ", model='" + model + '\'' + + ", year=" + year + + ", fuelType='" + fuelType + '\'' + + '}'; + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/nine/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/nine/Solution.java new file mode 100644 index 0000000..7abf263 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/nine/Solution.java @@ -0,0 +1,28 @@ +package com.rinftech.practice.nine; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; + +public class Solution { + public static void main(String[] args) { + List list = new ArrayList<>(); + String word = "Green"; + list.add("Red"); + list.add("Green"); + list.add("Black"); + list.add("White"); + list.add("Pink"); + list.add("Green"); + list.add("Green"); + list.add("Black"); + list.add("Yellow"); + list.add("White"); + + int firstOccurrence = list.indexOf(word); + Collections.reverse(list); + int lastOccurrence = list.size() - list.indexOf(word) - 1; + System.out.println("First occurrence for " + word + " is position " + firstOccurrence + + " and last is position " + lastOccurrence); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/one/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/one/Solution.java new file mode 100644 index 0000000..92a2005 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/one/Solution.java @@ -0,0 +1,18 @@ +package com.rinftech.practice.one; + +public class Solution { + public static void main(String[] args) { + long input = 8733; + int result = computeSumOfDigits(input); + System.out.println("The sum of an integer's digits = " + result); + } + + public static int computeSumOfDigits(long number) { + int result = 0; + while (number != 0) { + result += (int) (number % 10); + number /= 10; + } + return result; + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/seven/Animal.java b/JavaCourse/src/main/java/com/rinftech/practice/seven/Animal.java new file mode 100644 index 0000000..910fb58 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/seven/Animal.java @@ -0,0 +1,6 @@ +package com.rinftech.practice.seven; + +public abstract class Animal { + abstract void eat(); + abstract void sound(); +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/seven/Lion.java b/JavaCourse/src/main/java/com/rinftech/practice/seven/Lion.java new file mode 100644 index 0000000..e07e2da --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/seven/Lion.java @@ -0,0 +1,13 @@ +package com.rinftech.practice.seven; + +public class Lion extends Animal{ + @Override + void eat() { + System.out.println("Lions eat raw meat"); + } + + @Override + void sound() { + System.out.println("ROARRRRR!!!!"); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/seven/Panther.java b/JavaCourse/src/main/java/com/rinftech/practice/seven/Panther.java new file mode 100644 index 0000000..8c1e230 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/seven/Panther.java @@ -0,0 +1,13 @@ +package com.rinftech.practice.seven; + +public class Panther extends Animal{ + @Override + void eat() { + System.out.println("Tigers eat raw meat and prey"); + } + + @Override + void sound() { + System.out.println("Purrrrr....."); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/seven/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/seven/Solution.java new file mode 100644 index 0000000..c8c4efb --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/seven/Solution.java @@ -0,0 +1,19 @@ +package com.rinftech.practice.seven; + +import java.util.ArrayList; +import java.util.List; + +public class Solution { + public static void main(String[] args) { + List animals = new ArrayList<>(); + animals.add(new Lion()); + animals.add(new Tiger()); + animals.add(new Panther()); + + for (Animal animal : animals) { + animal.eat(); + animal.sound(); + } + + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/seven/Tiger.java b/JavaCourse/src/main/java/com/rinftech/practice/seven/Tiger.java new file mode 100644 index 0000000..b0e2df7 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/seven/Tiger.java @@ -0,0 +1,13 @@ +package com.rinftech.practice.seven; + +public class Tiger extends Animal{ + @Override + void eat() { + System.out.println("Tigers eat raw meat"); + } + + @Override + void sound() { + System.out.println("Chuff...."); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/six/Circle.java b/JavaCourse/src/main/java/com/rinftech/practice/six/Circle.java new file mode 100644 index 0000000..51b4631 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/six/Circle.java @@ -0,0 +1,15 @@ +package com.rinftech.practice.six; + +public class Circle extends Shape{ + + private final int radius; + + public Circle(int radius) { + this.radius = radius; + } + + @Override + double calculateArea() { + return Math.PI * Math.pow(radius, 2); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/six/Rectangle.java b/JavaCourse/src/main/java/com/rinftech/practice/six/Rectangle.java new file mode 100644 index 0000000..94e50b0 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/six/Rectangle.java @@ -0,0 +1,16 @@ +package com.rinftech.practice.six; + +public class Rectangle extends Shape{ + private final double length; + private final double width; + + public Rectangle(double length, double width) { + this.length = length; + this.width = width; + } + + @Override + double calculateArea() { + return length * width; + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/six/Shape.java b/JavaCourse/src/main/java/com/rinftech/practice/six/Shape.java new file mode 100644 index 0000000..7b6dd25 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/six/Shape.java @@ -0,0 +1,6 @@ +package com.rinftech.practice.six; + +public abstract class Shape { + + abstract double calculateArea(); +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/six/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/six/Solution.java new file mode 100644 index 0000000..c434b95 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/six/Solution.java @@ -0,0 +1,14 @@ +package com.rinftech.practice.six; + +public class Solution { + public static void main(String[] args) { + Circle circle = new Circle(5); + System.out.println("Circle area = " + circle.calculateArea()); + + Rectangle rectangle = new Rectangle(10, 13.5); + System.out.println("Rectangle area = " + rectangle.calculateArea()); + + Triangle triangle = new Triangle(13, 14, 16); + System.out.println("Triangle area = " + triangle.calculateArea()); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/six/Triangle.java b/JavaCourse/src/main/java/com/rinftech/practice/six/Triangle.java new file mode 100644 index 0000000..5492e51 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/six/Triangle.java @@ -0,0 +1,20 @@ +package com.rinftech.practice.six; + +public class Triangle extends Shape{ + private final double first_length; + private final double second_length; + private final double third_length; + + public Triangle(double first_length, double second_length, double third_length) { + this.first_length = first_length; + this.second_length = second_length; + this.third_length = third_length; + } + + @Override + double calculateArea() { + double semiPerimeter = (first_length + second_length + third_length) / 2; + return Math.sqrt(semiPerimeter * (semiPerimeter - first_length) * (semiPerimeter - second_length) * + (semiPerimeter - third_length)); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/ten/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/ten/Solution.java new file mode 100644 index 0000000..410c9a0 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/ten/Solution.java @@ -0,0 +1,29 @@ +package com.rinftech.practice.ten; + +import java.util.*; + +public class Solution { + public static void main(String[] args) { + String [] array = {"eat", "tea", "tan", "ate", "nat", "bat", "listen", + "silent", "enlist", "hello", "world", "dlrow"}; + Map> map = new HashMap<>(); + + for (String element : array) { + char[] chars = element.toCharArray(); + Arrays.sort(chars); + String sorted = new String(chars); + + List anagrams; + if (!map.containsKey(sorted)) + anagrams = new ArrayList<>(); + else anagrams = map.get(sorted); + + anagrams.add(element); + map.put(sorted, anagrams); + } + + System.out.println("Grouped anagrams:"); + for (String entry : map.keySet()) + System.out.println(map.get(entry)); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/three/Employee.java b/JavaCourse/src/main/java/com/rinftech/practice/three/Employee.java new file mode 100644 index 0000000..1e4b3f3 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/three/Employee.java @@ -0,0 +1,28 @@ +package com.rinftech.practice.three; + +public class Employee extends Person{ + private int employeeId; + private String jobTitle; + public Employee(String firstName, String lastName, int employeeId, String jobTitle) { + super(firstName, lastName); + this.employeeId = employeeId; + this.jobTitle = jobTitle; + } + + public int getEmployeeId() { + return employeeId; + } + + @Override + public String getLastName() { + return super.getLastName() + " " + jobTitle; + } + + @Override + public String toString() { + return "Employee{" + + "employeeId=" + employeeId + " " + + "firstName=" + super.getFirstName() + " " + + "lastName=" + getLastName() + "}"; + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/three/Person.java b/JavaCourse/src/main/java/com/rinftech/practice/three/Person.java new file mode 100644 index 0000000..54cbcd4 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/three/Person.java @@ -0,0 +1,27 @@ +package com.rinftech.practice.three; + +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; + } + + @Override + public String toString() { + return "Person{" + + "firstName='" + firstName + '\'' + + ", lastName='" + lastName + '\'' + + '}'; + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/three/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/three/Solution.java new file mode 100644 index 0000000..886b577 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/three/Solution.java @@ -0,0 +1,8 @@ +package com.rinftech.practice.three; + +public class Solution { + public static void main(String[] args) { + Employee employee = new Employee("Mike", "Dan", 1, "developer"); + System.out.println(employee); + } +} diff --git a/JavaCourse/src/main/java/com/rinftech/practice/two/Solution.java b/JavaCourse/src/main/java/com/rinftech/practice/two/Solution.java new file mode 100644 index 0000000..45ac000 --- /dev/null +++ b/JavaCourse/src/main/java/com/rinftech/practice/two/Solution.java @@ -0,0 +1,32 @@ +package com.rinftech.practice.two; + +import java.util.HashMap; +import java.util.Map; + +public class Solution { + static final String LETTERS = "Letters"; + static final String NUMBERS = "Numbers"; + static final String SPACES = "Spaces"; + + public static void main(String[] args) { + Map map = new HashMap<>(); + map.put(LETTERS, 0); + map.put(SPACES, 0); + map.put(NUMBERS, 0); + String input = "The quick brown fox jumps over 42 lazy dogs"; + + analyzeText(input, map); + System.out.println("The text has: \n" + "Letters: " + map.get(LETTERS) + "\n" + + "Numbers: " + map.get(NUMBERS) + "\n" + "Spaces: " + map.get(SPACES)); + } + + public static void analyzeText(String text, Map map) { + for (int i = 0; i < text.length(); i++) + if (text.charAt(i) >= 'a' && text.charAt(i) <= 'z' || + text.charAt(i) >= 'A' && text.charAt(i) <= 'Z') + map.put(LETTERS, map.get(LETTERS) + 1); + else if (text.charAt(i) >= '0' && text.charAt(i) <= '9') + map.put(NUMBERS, map.get(NUMBERS) + 1); + else map.put(SPACES, map.get(SPACES) + 1); + } +}