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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone{
  6. public static void main(String[] args) {
  7.     Potwor[] ptw = new Potwor[3];
  8.     ptw[0] = new Wampir();
  9.     ptw[1] = new Smok();
  10.     ptw[2] = new Potwor();
  11.     for (int x = 0; x < 3; x++) {
  12.     		if (ptw[x] instanceof Wampir{
  13.     			ptw[x].strasz(""+x);
  14.     		}else{
  15.             ptw[x].strasz(x);
  16.         }}
  17.  
  18.     }
  19. }
  20.  
  21. class Potwor {
  22.     boolean strasz(int z) { // pierwotna metoda
  23.         System.out.println("auuuuuu");
  24.         return true;
  25.         }
  26. }
  27.  
  28. class Wampir extends Potwor { // przeciążona metoda
  29.     boolean strasz(String b) {
  30.         System.out.println("można gryza");
  31.         return true;
  32.         }
  33. }
  34.  
  35. class Smok extends Potwor {
  36.     boolean strasz(int stopien) { // przesłonięta metoda
  37.             System.out.println("zioń ogniem");
  38.             return true;
  39.         }
  40. }
Compilation error #stdin compilation error #stdout 0.06s 711168KB
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Standard input is empty
compilation info 
Main.java:12: error: ')' expected
    		if (ptw[x] instanceof Wampir{
    		                            ^
1 error
stdout
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Standard output is empty
https://ideone.com/777K3Q
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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