diff --git a/w4/Car.java b/w4/Car.java
deleted file mode 100644
index e69de29..0000000
diff --git a/w4/TestCar.java b/w4/TestCar.java
deleted file mode 100644
index c008f31..0000000
--- a/w4/TestCar.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package w4;
-
-
-public class TestCar {
-    public static void main(String[] args) {
-        Car car1 = new Car("京A12345", "丰田", "凯美瑞", 450.0);
-        Car car2 = new Car("沪B67890", "大众", "帕萨特");
-        Car car3 = new Car("粤C54321", "宝马", "3系", 680.0);
-
-        System.out.println("=====初始车辆信息=====");
-        car1.displayInfo();
-        car2.displayInfo();
-        car3.displayInfo();
-
-
-        System.out.println("=====测试租车还车=====");
-        car1.rentCar();    
-        car1.rentCar();    
-        car1.returnCar();  
-        car1.returnCar();  
-        System.out.println();
-
-
-        System.out.println("=====计算5天租金=====");
-        double rent = car2.calculateRent(5);
-        System.out.println("车辆2租用5天总费用：" + rent + "元\n");
-
-
-        System.out.println("=====测试非法修改租金=====");
-        car3.setDailyRent(-100);
-        System.out.println();
-
-        System.out.println("=====车辆总数统计=====");
-        System.out.println("系统中总车辆数：" + Car.getTotalCars());
-    }
-}