diff --git a/W5/Shape/Circle.java b/W5/Shape/Circle.java
new file mode 100644
index 0000000..0fc8472
--- /dev/null
+++ b/W5/Shape/Circle.java
@@ -0,0 +1,6 @@
+public class Circle extends Shape{
+    @Override
+    public void draw(){
+    System.out.println("圆形");
+    }
+}
diff --git a/W5/Shape/Main.java b/W5/Shape/Main.java
new file mode 100644
index 0000000..978ef45
--- /dev/null
+++ b/W5/Shape/Main.java
@@ -0,0 +1,12 @@
+public class Main {
+        public static void drawShape(Shape s) {
+            s.draw();
+        }
+        public static void main(String[] args) {
+            Shape circle = new Circle();
+            Shape rectangle = new Rectangle();
+            drawShape(circle);
+            drawShape(rectangle);
+        }
+}
+
diff --git a/W5/Shape/Rectangle.java b/W5/Shape/Rectangle.java
new file mode 100644
index 0000000..cb20f4e
--- /dev/null
+++ b/W5/Shape/Rectangle.java
@@ -0,0 +1,6 @@
+public class Rectangle extends Shape{
+    @Override
+    public void draw() {
+        System.out.println("矩形");
+    }
+}
diff --git a/W5/Shape/Shape.java b/W5/Shape/Shape.java
new file mode 100644
index 0000000..fc69cfc
--- /dev/null
+++ b/W5/Shape/Shape.java
@@ -0,0 +1,6 @@
+public class Shape {
+    public void draw(){
+        System.out.println("shape");
+    }
+}
+
diff --git a/W5/Vehicle/Bike.java b/W5/Vehicle/Bike.java
new file mode 100644
index 0000000..64f0dc4
--- /dev/null
+++ b/W5/Vehicle/Bike.java
@@ -0,0 +1,6 @@
+public class Bike extends Vehicle{
+    @Override
+    public void run(){
+        System.out.println("自行车");
+    }
+}
diff --git a/W5/Vehicle/Car.java b/W5/Vehicle/Car.java
new file mode 100644
index 0000000..88ee985
--- /dev/null
+++ b/W5/Vehicle/Car.java
@@ -0,0 +1,6 @@
+public class Car extends Vehicle{
+    @Override
+    public void run(){
+        System.out.println("汽车");
+    }
+}
diff --git a/W5/Vehicle/Truck.java b/W5/Vehicle/Truck.java
new file mode 100644
index 0000000..40d3223
--- /dev/null
+++ b/W5/Vehicle/Truck.java
@@ -0,0 +1,6 @@
+public class Truck extends Vehicle{
+    @Override
+    public void run(){
+        System.out.println("卡车");
+    }
+}
diff --git a/W5/Vehicle/Vehicle.java b/W5/Vehicle/Vehicle.java
new file mode 100644
index 0000000..ecef84f
--- /dev/null
+++ b/W5/Vehicle/Vehicle.java
@@ -0,0 +1,3 @@
+public abstract class Vehicle {
+    public abstract void run();
+}