上传文件至 'w5'

w5/Bike.java

@@ -0,0 +1,6 @@
+public class Bike extends Vehicle {
+	@Override
+	public void run() {
+		System.out.println("自行车在慢慢骑行");
+	}
+}

w5/Car.java

@@ -0,0 +1,6 @@
+public class Car extends Vehicle {
+    @Override
+    public void run() {
+        System.out.println("小汽车在公路上行驶");
+    }
+}

w5/TestVehicle.java

@@ -0,0 +1,14 @@
+public class TestVehicle {
+	public static void main(String[] args) {
+		// 创建Vehicle数组，存放不同车辆
+		Vehicle[] vehicles = new Vehicle[3];
+		vehicles[0] = new Car();
+		vehicles[1] = new Bike();
+		vehicles[2] = new Truck();
+
+		// 遍历数组，调用run()
+		for (Vehicle v : vehicles) {
+			v.run();
+		}
+	}
+}

w5/Truck.java

@@ -0,0 +1,6 @@
+public class Truck extends Vehicle {
+	@Override
+	public void run() {
+		System.out.println("大卡车在载货行驶");
+	}
+}

w5/Vehicle.java

@@ -0,0 +1,3 @@
+public abstract class Vehicle {
+    public abstract void run();
+}