上传文件至 'w5'

w5/Bike.java

@@ -0,0 +1,8 @@
+package Vehicle;
+
+public class Bike extends Vehicle{
+    @Override
+    public void run(){
+        System.out.println("自行车跑");
+    }
+}

w5/Car.java

@@ -0,0 +1,8 @@
+package Vehicle;
+
+public class Car extends Vehicle{
+    @Override
+    public void run(){
+        System.out.println("小汽车跑");
+    }
+}

w5/Truck.java

@@ -0,0 +1,8 @@
+package Vehicle;
+
+public class Truck extends Vehicle{
+    @Override
+    public void run(){
+        System.out.println("卡车跑");
+    }
+}

w5/Vehicle.java

@@ -0,0 +1,5 @@
+package Vehicle;
+
+public abstract class Vehicle {
+    public abstract void run();
+}

w5/main.java

@@ -1,14 +1,15 @@
-package Shape;
+package Vehicle;
 
 public class main {
-    public static void drawShape(Shape s){
-        s.draw();
-    }
     public static void main(String[] args){
-        Shape circle = new Circle();
-        Shape rectabgle = new Rectangle();
+        Vehicle[] vehicles = {
+                new Car(),
+                new Bike(),
+                new Truck()
 
-        drawShape(circle);
-        drawShape(rectabgle);
+        };
+        for(Vehicle v : vehicles){
+            v.run();
+        }
     }
 }