diff --git a/w5/A_Circlew5.java b/w5/A_Circlew5.java
new file mode 100644
index 0000000..7d31409
--- /dev/null
+++ b/w5/A_Circlew5.java
@@ -0,0 +1,6 @@
+public class A_Circlew5 extends A_Graphic {
+    @Override
+    public void draw() {
+        System.out.println("绘制一个圆形");
+    }
+}
\ No newline at end of file
diff --git a/w5/A_Graphic.java b/w5/A_Graphic.java
new file mode 100644
index 0000000..bb84016
--- /dev/null
+++ b/w5/A_Graphic.java
@@ -0,0 +1,5 @@
+public class A_Graphic {
+    public void draw() {
+        System.out.println("绘制一个图形");
+    }
+}
diff --git a/w5/A_Main1.java b/w5/A_Main1.java
new file mode 100644
index 0000000..a4c812b
--- /dev/null
+++ b/w5/A_Main1.java
@@ -0,0 +1,15 @@
+public class A_Main1 {public static void drawGraphic(A_Graphic g) {
+    g.draw();
+}
+
+    public static void main(String[] args) {
+        A_Graphic graphic = new A_Graphic();
+        A_Circlew5 circle = new A_Circlew5();
+        A_Rectanglew5 rectangle = new A_Rectanglew5();
+
+        drawGraphic(graphic);
+        drawGraphic(circle);
+        drawGraphic(rectangle);
+    }
+}
+
diff --git a/w5/A_Rectanglew5.java b/w5/A_Rectanglew5.java
new file mode 100644
index 0000000..f150a2d
--- /dev/null
+++ b/w5/A_Rectanglew5.java
@@ -0,0 +1,6 @@
+public class A_Rectanglew5 extends A_Graphic {
+    @Override
+    public void draw() {
+        System.out.println("绘制一个矩形");
+    }
+}
diff --git a/w5/Bike.java b/w5/Bike.java
new file mode 100644
index 0000000..6cdc0bf
--- /dev/null
+++ b/w5/Bike.java
@@ -0,0 +1,6 @@
+public class Bike extends Vehicle {
+    @Override
+    public void run() {
+        System.out.println("自行车在自行车道上骑行");
+    }
+}
diff --git a/w5/Car.java b/w5/Car.java
new file mode 100644
index 0000000..3888c0e
--- /dev/null
+++ b/w5/Car.java
@@ -0,0 +1,6 @@
+public class Car extends Vehicle {
+    @Override
+    public void run() {
+        System.out.println("汽车在公路上行驶");
+    }
+}
diff --git a/w5/Main2.java b/w5/Main2.java
new file mode 100644
index 0000000..ca43736
--- /dev/null
+++ b/w5/Main2.java
@@ -0,0 +1,12 @@
+public class Main2 {
+    public static void main(String[] args) {
+        Vehicle[] vehicles = new Vehicle[3];
+        vehicles[0] = new Car();
+        vehicles[1] = new Bike();
+        vehicles[2] = new Truck();
+
+        for (Vehicle v : vehicles) {
+            v.run();
+        }
+    }
+}
diff --git a/w5/Truck.java b/w5/Truck.java
new file mode 100644
index 0000000..c60f669
--- /dev/null
+++ b/w5/Truck.java
@@ -0,0 +1,6 @@
+public class Truck extends Vehicle {
+    @Override
+    public void run() {
+        System.out.println("卡车在高速上运输货物");
+    }
+}
diff --git a/w5/Vehicle.java b/w5/Vehicle.java
new file mode 100644
index 0000000..ecef84f
--- /dev/null
+++ b/w5/Vehicle.java
@@ -0,0 +1,3 @@
+public abstract class Vehicle {
+    public abstract void run();
+}