lab interfaces terminado

java/com/practice2/BigDecimalUtils.java

@@ -0,0 +1,18 @@
+package com.practice2;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public class BigDecimalUtils {
+
+    public static double round(BigDecimal number) {
+        return number.setScale(2, RoundingMode.HALF_UP).doubleValue();
+    }
+
+    public static double changeSign(BigDecimal number) {
+        return number
+                .negate()
+                .setScale(1, RoundingMode.HALF_UP)
+                .doubleValue();
+    }
+}

java/com/practice2/Main.java

@@ -0,0 +1,24 @@
+package com.practice2;
+import com.practice2.list.IntArrayList;
+import java.math.BigDecimal;
+
+public class Main {
+    public static void  main(String[]args){
+
+        IntArrayList list = new IntArrayList();
+        list.add(10);
+        list.add(20);
+        list.add(30);
+
+        System.out.println(list.get(0));
+        System.out.println(list.get(1));
+        System.out.println(list.get(2));
+
+        BigDecimal num = new BigDecimal("4.2545");
+
+        System.out.println(BigDecimalUtils.round(num));
+        System.out.println(BigDecimalUtils.changeSign(num));
+
+    }
+
+}

java/com/practice2/cars/Car.java

@@ -0,0 +1,22 @@
+package com.practice2.cars;
+
+public abstract class Car {
+    private String vinNumber;
+    private String make;
+    private String model;
+    private int mileage;
+
+    public Car(String vinNumber, String make, String model, int mileage) {
+        this.vinNumber = vinNumber;
+        this.make = make;
+        this.model = model;
+        this.mileage = mileage;
+    }
+    public String getInfo() {
+        return "VIN :" + vinNumber +
+                ",MAKE :" + make +
+                ",MODEL :" + model +
+                ",MILEAGE :" + mileage;
+
+    }
+}

java/com/practice2/cars/Sedan.java

@@ -0,0 +1,8 @@
+package com.practice2.cars;
+
+public class Sedan extends Car {
+
+    public Sedan(String vinNumber, String make, String model, int mileage) {
+        super(vinNumber, make, model, mileage);
+    }
+}

java/com/practice2/cars/Truck.java

@@ -0,0 +1,11 @@
+package com.practice2.cars;
+
+public class Truck extends Car {
+    private double towingCapacity;
+
+    public Truck(String vinNumber, String make, String model, int mileage, double towingCapacity) {
+        super(vinNumber, make, model, mileage);
+        this.towingCapacity = towingCapacity;
+
+    }
+}

java/com/practice2/cars/UtilityVehicle.java

@@ -0,0 +1,10 @@
+package com.practice2.cars;
+
+public class UtilityVehicle extends Car{
+    private boolean fourWheelDrive;
+
+    public UtilityVehicle(String vinNumber, String make, String model, int mileage, boolean fourWheelDrive) {
+        super(vinNumber, make, model, mileage);
+        this.fourWheelDrive = fourWheelDrive;
+    }
+}

java/com/practice2/list/IntArrayList.java

@@ -0,0 +1,23 @@
+package com.practice2.list;
+public class IntArrayList implements IntList{
+
+    private int[] numbers = new int[10];
+    private int size = 0;
+
+    @Override
+    public void add(int number){
+        if (size == numbers.length){
+            int newSize = numbers.length + (numbers.length / 2);
+            int [] newArray = new int [newSize];
+            System.arraycopy(numbers, 0, newArray, 0, size);
+            numbers = newArray;
+        }
+        numbers[size] = number;
+        size++;
+    }
+
+    @Override
+    public int get(int id){
+        return numbers[id];
+    }
+}

java/com/practice2/list/IntList.java

@@ -0,0 +1,7 @@
+package com.practice2.list;
+
+public interface IntList {
+    void add(int number);
+    int get(int id);
+
+}

java/com/practice2/list/IntVector.java

@@ -0,0 +1,27 @@
+package com.practice2.list;
+
+public class IntVector implements IntList{
+
+
+    private int[] numbers = new int[20];
+    private int size = 0;
+
+    @Override
+    public void add(int number) {
+        if (size == numbers.length) {
+            int newSize = numbers.length * 2;
+            int[] newArray = new int[newSize];
+
+            System.arraycopy(numbers, 0, newArray, 0, size);
+            numbers = newArray;
+        }
+
+        numbers[size] = number;
+        size++;
+    }
+
+    @Override
+    public int get(int id) {
+        return numbers[id];
+    }
+}

java/com/practice2/video/Movie.java

@@ -0,0 +1,10 @@
+package com.practice2.video;
+
+public class Movie extends Video{
+    private double rating;
+
+    public Movie (String title, int duration, double rating) {
+        super(title, duration);
+        this.rating = rating;
+    }
+}

java/com/practice2/video/TvSeries.java

@@ -0,0 +1,11 @@
+package com.practice2.video;
+
+public class TvSeries extends Video{
+    private int episodes;
+
+    public TvSeries(String title, int duration, int episodes){
+        super(title,duration);
+        this.episodes = episodes;
+    }
+
+}

java/com/practice2/video/Video.java

@@ -0,0 +1,18 @@
+package com.practice2.video;
+
+public abstract class Video {
+    private String title;
+    private int duration;
+
+    public Video (String title, int duration){
+        this.title = title;
+        this.duration = duration;
+    }
+
+    public String getInfo(){
+        return "TITLE :" + title +
+                "DURATION :" + duration;
+
+    }
+
+}