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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 Counter {
  9.     private int count = 0;
  10.  
  11.     public void increment() {
  12.         count++;  // Thread-safe increment
  13.     }
  14.  
  15.     public int getCount() {
  16.         return count;
  17.     }
  18. }
  19. class Ideone
  20. {
  21. 	public static void main (String[] args) throws java.lang.Exception
  22. 	{
  23. 		// your code goes here
  24. 		Counter c= new Counter();
  25. 		Thread t1 = new Thread(new Runnable(){
  26. 			@Override
  27. 			public void run(){
  28. 				for(int i=0;i<1000;i++){
  29. 					c.increment();
  30. 				}
  31. 			}
  32. 		}
  33. 			);
  34. 		Thread t2 = new Thread(new Runnable(){
  35. 			@Override
  36. 			public void run(){
  37. 				for(int i=0;i<1000;i++){
  38. 					c.increment();
  39. 				}
  40. 			}
  41. 		}
  42. 			);
  43. 		t1.start();
  44. 		t2.start();
  45.  
  46. 		t1.join();
  47. 		t2.join();
  48. 		System.out.println(c.getCount());
  49. 	}
  50. }
Success #stdin #stdout 0.09s 52560KB
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https://ideone.com/PjVNjs
language:
Java (HotSpot 12)
created:
258 days ago
visibility:
public

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