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  1. public class MainClass{
  2.  
  3. 	public static void main(String[] args) {
  4. 		PrimaryThread thread1 = new PrimaryThread();
  5. 		PrimaryThread thread2 = new PrimaryThread();
  6. 		thread1.start();
  7. 		thread2.start();
  8. 	}
  9. }
  10.  
  11. class PrimaryThread extends Thread{
  12.  
  13. 	private int counter;
  14.  
  15. 	public PrimaryThread(){
  16. 		counter = 0;
  17. 	}
  18.  
  19. 	synchronized public void run(){
  20. 		for(int i = 0; i < 50; i++){
  21. 			System.out.println(++counter);
  22. 		}
  23.  
  24. 	}
  25. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
Main.java:1: error: class MainClass is public, should be declared in a file named MainClass.java
public class MainClass{
       ^
1 error
stdout 
Standard output is empty
https://ideone.com/hzOofo
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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