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  1.  
  2. class Ideone
  3. {
  4. 	public static void main (String[] args) throws java.lang.Exception
  5. 	{
  6.  
  7.         Train2 ko = new Train2(50);
  8.         Express azusa = new Express(100);
  9.         run(ko);
  10.         run(azusa);
  11.     }
  12.  
  13.     public static void run(Train2 t) {
  14.         t.up();
  15.         t.print();
  16.     }
  17. }
  18. // your code goes here
  19.  
  20. class Train {
  21.     public int speed;
  22.  
  23.     public void up() {
  24.         speed += 1;
  25.     }
  26.  
  27.     public void down() {
  28.         speed -= 1;
  29.     }
  30. }
  31. class Train2 {
  32.     protected int speed;
  33.  
  34.     public Train2(int s) {
  35.         this.speed = s;
  36.     }
  37.  
  38.     public int getSpeed() {
  39.         return speed;
  40.     }
  41.  
  42.     public void up() {
  43.         speed += 1;
  44.     }
  45.  
  46.     public void print() {
  47.         System.out.println(speed);
  48.     }
  49. }
  50.  
  51. class Express extends Train2 {
  52.     public Express(int ss) {
  53.         super(ss);
  54.         System.out.println("Express");        
  55.     }
  56.  
  57.     public void up() {
  58.         speed += 5;
  59.     }
  60.  
  61.     }
  62.  
  63.  
Success #stdin #stdout 0.08s 54704KB
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Express
51
105
https://ideone.com/79F8eG
language:
Java (HotSpot 12)
created:
11 days ago
visibility:
public

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