[Week3][Chap12] 다형성 - 역할과 구현 예제3 (#27)

김아린/java-basic/src/poly/car1/Car.java

@@ -0,0 +1,9 @@
+package poly.car1;
+
+public interface Car {
+    void startEngine();
+
+    void offEngine();
+
+    void pressAccelerator();
+}

김아린/java-basic/src/poly/car1/CarMain1.java

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+package poly.car1;
+
+public class CarMain1 {
+    public static void main(String[] args) {
+        Driver driver = new Driver();
+
+        // 차량 선택(k3)
+        K3Car k3Car = new K3Car();
+        driver.setCar(k3Car);
+        driver.drive();
+
+        // 차량 변경(k3 -> model3)
+        Model3Car model3Car = new Model3Car();
+        driver.setCar(model3Car);
+        driver.drive();
+    }
+}

김아린/java-basic/src/poly/car1/Driver.java

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+package poly.car1;
+
+public class Driver {
+    private Car car;
+
+    public void setCar(Car car) {
+        System.out.println("자동차를 설정합니다: " + car);
+        this.car = car;
+    }
+
+    public void drive() {
+        System.out.println("자동차를 운전합니다.");
+        car.startEngine();
+        car.pressAccelerator();
+        car.offEngine();
+    }
+}

김아린/java-basic/src/poly/car1/K3Car.java

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+package poly.car1;
+
+public class K3Car implements Car {
+    @Override
+    public void startEngine() {
+        System.out.println("K3Car.startEngine");
+    }
+
+    @Override
+    public void offEngine() {
+        System.out.println("K3Car.offEngine");
+    }
+
+    @Override
+    public void pressAccelerator() {
+        System.out.println("K3Car.pressAccelerator");
+    }
+}

김아린/java-basic/src/poly/car1/Model3Car.java

@@ -0,0 +1,18 @@
+package poly.car1;
+
+public class Model3Car implements Car {
+    @Override
+    public void startEngine() {
+        System.out.println("Model3Car.startEngine");
+    }
+
+    @Override
+    public void offEngine() {
+        System.out.println("Model3Car.offEngine");
+    }
+
+    @Override
+    public void pressAccelerator() {
+        System.out.println("Model3Car.pressAccelerator");
+    }
+}