上传文件至 'w5'

w5/Bike.java

@@ -0,0 +1,9 @@
+public class Bike extends Vehicle{
+    protected Bike(String name){
+        this.s=name;
+    }
+    @Override
+    public void run(){
+        System.out.println(s+" is running");
+    }
+}

w5/Car.java

@@ -0,0 +1,9 @@
+public  class Car extends Vehicle {
+    protected Car(String name){
+        this.s=name;
+    }
+    @Override
+    public void run(){
+        System.out.println(s+" is running");
+    } 
+}

w5/Circle.java

@@ -0,0 +1,6 @@
+public class Circle extends Shape{
+    @Override
+    protected void draw(){
+        System.out.println("Circle is drawn.");
+    }
+}

w5/DrawShape.java

@@ -0,0 +1,5 @@
+public class DrawShape {
+    public static void drawshape(Shape s){
+        s.draw();
+    }
+}

w5/Main.java

@@ -0,0 +1,25 @@
+public class Main {
+    public static void main(){
+    Shape c=new Circle();
+    Shape r=new Retangle();
+    DrawShape.drawshape(c);
+    DrawShape.drawshape(r);
+    Vehicle[] bikes=new Bike[5];
+    Vehicle[] cars=new Car[5];
+    Vehicle[] trucks=new Truck[5];
+    for (int i=0;i<5;i++){
+        bikes[i]=new Bike("bike"+(i+1));
+        cars[i]=new Car("car"+(i+1));
+        trucks[i]=new Truck("truck"+(i+1));
+    }
+    for(Vehicle bike:bikes){
+        bike.run();
+    }
+    for(Vehicle car:cars){
+        car.run();
+    }
+    for(Vehicle truck:trucks){
+        truck.run();
+    }
+    }
+}