add exercises Abstraction

Author: EurusDevSec

JavaOOP/Exercises/Abtraction/BaiTap6_1/Employee.java

@@ -0,0 +1,16 @@
+package Exercises.Abtraction.BaiTap6_1;
+
+public abstract class Employee {
+    protected String id;
+    protected String name;
+    protected double salary;
+
+    public Employee(String id, String name, double salary) {
+        this.id = id;
+        this.name = name;
+        this.salary = salary;
+    }
+
+    public abstract double calculateSalary();
+
+}

JavaOOP/Exercises/Abtraction/BaiTap6_1/FulltimeEmployee.java

@@ -0,0 +1,13 @@
+package Exercises.Abtraction.BaiTap6_1;
+
+public class FulltimeEmployee extends Employee {
+
+    public FulltimeEmployee(String id, String name, double salary) {
+        super(id, name, salary);
+    }
+
+    @Override
+    public double calculateSalary() {
+        return 1000 * salary;
+    }
+}

JavaOOP/Exercises/Abtraction/BaiTap6_1/PartTimeEmployee.java

@@ -0,0 +1,14 @@
+package Exercises.Abtraction.BaiTap6_1;
+
+public class PartTimeEmployee extends Employee {
+    public PartTimeEmployee(String id, String name, double salary) {
+        super(id, name, salary);
+
+    }
+
+    @Override
+    public double calculateSalary() {
+        return 500 * salary;
+    }
+
+}

JavaOOP/Exercises/Abtraction/BaiTap6_2/ChessGame.java

@@ -0,0 +1,25 @@
+package Exercises.Abtraction.BaiTap6_2;
+
+public class ChessGame extends Game {
+    public ChessGame(String name, String company, double capacity) {
+        super(name, company, capacity);
+    }
+
+    @Override
+    public void start() {
+        System.out.println("the ChessGame is ready to start!");
+
+    }
+
+    @Override
+    public void play() {
+        System.out.println("Let's move E4 to play your pieces");
+    }
+
+    @Override
+    public void end() {
+        System.out.println("Did you want to end this game!");
+
+    }
+
+}

JavaOOP/Exercises/Abtraction/BaiTap6_2/FootballGame.java

@@ -0,0 +1,24 @@
+package Exercises.Abtraction.BaiTap6_2;
+
+public class FootballGame extends Game {
+
+    public FootballGame(String name, String company, double capacity) {
+        super(name, company, capacity);
+    }
+
+    @Override
+    public void start() {
+        System.out.println("The FootballGame is ready to start!");
+    }
+
+    @Override
+    public void play() {
+        System.out.println("Let's play FootballGame");
+    }
+
+    @Override
+    public void end() {
+        System.out.println("This Footballgame is end now");
+    }
+
+}

JavaOOP/Exercises/Abtraction/BaiTap6_2/Game.java

@@ -0,0 +1,20 @@
+package Exercises.Abtraction.BaiTap6_2;
+
+public abstract class Game {
+    protected String name;
+    protected String company;
+    protected double capacity;
+
+    public Game(String name, String company, double capacity) {
+        this.name = name;
+        this.company = company;
+        this.capacity = capacity;
+    }
+
+    public abstract void start();
+
+    public abstract void play();
+
+    public abstract void end();
+
+}