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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		for (int i = 0; i < 100000; i++) {
  13.  
  14.             HashSet<Object> set = new HashSet<>();
  15.  
  16.             long items = Math.round(Math.random() * 10);
  17.  
  18.             for (int j = 0; j < items; j++) {
  19.                 set.add(Double.toHexString(Math.random() * 1232330));
  20.             }
  21.  
  22.             byte[] source = toBytes(set);
  23.             Object obj = toObject(source);
  24.             byte[] result = toBytes(obj);
  25.  
  26.             for (int j = 0; j < source.length; j++) {
  27.                 if (source[j] != result[j]) {
  28.                     throw new Exception("CHO ZA HOOINYA?");
  29.                 }
  30.             }
  31.         }
  32.         System.out.println("OK!");
  33. 	}
  34.  
  35. 	static byte[] toBytes(Object obj) throws Exception {
  36.         ByteArrayOutputStream bos = new ByteArrayOutputStream();
  37.         try {
  38.             ObjectOutput out = new ObjectOutputStream(bos);
  39.             out.writeObject(obj);
  40.             out.flush();
  41.             return bos.toByteArray();
  42.         } finally {
  43.             try {
  44.                 bos.close();
  45.             } catch (IOException ex) {
  46.                 // ignore close exception
  47.             }
  48.         }
  49.     }
  50.  
  51.     static Object toObject(byte[] bytes) throws Exception {
  52.         ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
  53.         ObjectInput in = null;
  54.         try {
  55.             in = new ObjectInputStream(bis);
  56.             return in.readObject();
  57.         } finally {
  58.             try {
  59.                 if (in != null) {
  60.                     in.close();
  61.                 }
  62.             } catch (IOException ex) {
  63.                 // ignore close exception
  64.             }
  65.         }
  66.     }
  67. }
Runtime error #stdin #stdout #stderr 0.06s 711168KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
Exception in thread "main" java.lang.Exception: CHO ZA HOOINYA?
	at Ideone.main(Main.java:28)
https://ideone.com/c0H9UZ
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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