首先创建父类，因为BYD和BMW同输入汽车，有共同的属性和方法  1 public class Car { 2     int price; 3     String type; 4     String color; 5     public Car() { 6         super(); 7     } 8     public Car(int price, String type, String color) { 9         super();10         this.price = price;11         this.type = type;12         this.color = color;13     }14     15     public void show(){16         System.out.println("I can run!");17     }18 }

创建BYD子类，并重写方法  1 public class BYD extends Car { 2      3     public BYD() { 4         super(); 5     } 6  7     public BYD(int price, String type, String color) { 8         super(price, type, color); 9     }10 11     public void show(){12         System.out.println("BYD");13         System.out.println("价格"+price);14         System.out.println("型号"+type);15         System.out.println("颜色"+color);16     }17 }

1 public class BMW extends Car { 2      3     public BMW() { 4         super(); 5     } 6  7     public BMW(int price, String type, String color) { 8         super(price, type, color); 9     }10 11     public void show(){12         System.out.println("BMW");13         System.out.println("价格"+price);14         System.out.println("型号"+type);15         System.out.println("颜色"+color);16     }17 }

静态和非静态的问题也要注意，到底是谁调用  1 public class Driver { 2     static String name; 3      4     public Driver(String sex) { 5         this.name = name; 6     } 7     public Driver() { 8     } 9     /*10      * 创建方法11      */12     public static void drive(Car A){
   //static?13         System.out.println(name+"Let's run!");14         A.show();15     }16     17     public static void main(String[] args) {18         Driver driver=new Driver("张三");19         Car byd=new BYD(3000000,"唐","红");20         driver.drive(byd);//这样调用可以不是static21         Car bmw=new BMW(8000000,"x5","黑");22         Driver.drive(bmw);//这样调用必须是static23     }24 }