java類與對象，用程式解釋

標籤：cti   int   card   new   static   []   name   第一個   屬性   

//第一個
 1 public class Cardemo{ 2     public static void main(String[] args){ 3         Car carwind = new Car(60,"red","west"); 4         carwind.speed = 60; 5         carwind.color = "red"; 6         carwind.direction = "west"; 7          8         System.out.println("The speed of car is " + carwind.speed); 9         System.out.println("The color of car is " + carwind.color);10         System.out.println("The direction of car is " + carwind.direction);11     }12 }13 class Car{14     //定義四個成員變數（屬性）15     int speed;16     String color;17     String name;18     String direction;19 }

第二個

public class Cardemo{    public static void main(String[] args){        Car carwind = new Car(60,"red","west"); //建立一個Car類的引用        carwind.speed = 60;        carwind.color = "red";        carwind.direction = "west";                System.out.println("The speed of car is " + carwind.speed);        System.out.println("The color of car is " + carwind.color);        System.out.println("The direction of car is " + carwind.direction);        carwind.drivecar();        carwind.speedup(5);        System.out.println("The speed of car is " + carwind.speed);            }}class Car{    //定義四個成員變數（屬性）    int speed;    String color;    String name;    String direction;        Car(int speed, String color, String direction){        this.speed = speed;        this.color = color;        this.direction = direction;    }        public void drivecar(){        System.out.println("here we go!");    }    public void speedup(int aspeed){        this.speed = speed + aspeed;    }}

 

java類與對象，用程式解釋