Group 5

Homeworks/Answer.md

@@ -0,0 +1,134 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+```
+package homework;
+
+/**
+ *
+ * @author Hoangduy
+ */
+interface AnimalInterface {      //Interface Segregation Principle Violation
+    public boolean flyable();
+    public boolean eatable();
+}
+
+class Dog implements AnimalInterface {
+    @Override
+    public boolean flyable() {
+        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+    }
+
+    @Override
+    public boolean eatable() {
+        return true;
+    }
+}
+
+class Bird implements AnimalInterface {
+
+    @Override
+    public boolean flyable() {
+        return true;
+    }
+
+    @Override
+    public boolean eatable() {
+        return true;
+    }    
+}
+
+class Feedable {//Single Responsibility Principle Violation & Open-Closed Principle
+    private float weight;
+
+    public float getWeight() {
+        return weight;
+    }
+
+    public void setWeight(float weight) {
+        this.weight = weight;
+    }
+
+    public void flyable(Animal charecter){
+        if(charecter.fly()){
+            System.out.printf("it can Fly");
+        }
+    }
+
+    public void weightFood(Animal charecter) {
+        setWeight(50);
+        if(charecter.eat()) {
+            if(getWeight() < 30) {
+                System.out.printf("foof/day = 2kg");
+            }
+            else 
+                System.out.printf("foof/day = 5kg");
+        }
+        System.out.printf("no food");
+    }
+
+}
+
+// Refactored
+
+interface flyable {
+    public boolean fly();
+}
+
+interface eatable {
+    public boolean eat();
+}
+
+class Dog implements eatable {
+
+    @Override
+    public boolean eat() {
+        return true;
+    }
+}
+
+class Bird implements flyable, eatable {
+
+    @Override
+    public boolean fly() {
+        return true;
+    }
+
+    @Override
+    public boolean eat() {
+        return true;
+    }
+}
+
+class checkFood {
+    private float weight;
+
+    public float getWeight() {
+        return weight;
+    }
+
+    public void setWeight(float weight) {
+        this.weight = weight;
+    }
+    public void weightFood(Animal charecter) {
+        setWeight(50);
+        if(charecter.eat()) {
+            if(getWeight() < 30) {
+                System.out.printf("foof/day = 2kg");
+            } else 
+                System.out.printf("foof/day = 5kg");
+        }
+        System.out.printf("no food");
+    }
+}
+
+class checkFly {
+    public void checkFly(Animal charecter){
+        if(charecter.fly()){
+            System.out.printf("it can Fly");
+        }
+    }
+}
+```