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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 synchronized void printOdd() {
  12.     	while(count%2==0){
  13.     		try{
  14.     		wait();
  15.     		}catch(InterruptedException e){
  16.     		Thread.currentThread().interrupt();
  17.     		}
  18.     	}
  19.     	System.out.println("ODD "+count);
  20.         count++;  // Thread-safe increment
  21.  
  22.         notify();
  23.     }
  24. 	public synchronized void printEven() {
  25.     	while(count%2==1){
  26.     		try{
  27.     		wait();
  28.     		}catch(InterruptedException e){
  29.     		Thread.currentThread().interrupt();
  30.     		}
  31.     	}
  32.     	System.out.println("EVEN "+count);
  33.         count++;  // Thread-safe increment
  34.  
  35.         notify();
  36.     }
  37. }
  38. class Ideone
  39. {
  40. 	public static void main (String[] args) throws java.lang.Exception
  41. 	{
  42. 		// your code goes here
  43. 		Counter c= new Counter();
  44. 		Thread t1 = new Thread(new Runnable(){
  45. 			@Override
  46. 			public void run(){
  47. 				for(int i=0;i<6;i++){
  48. 					c.printEven();
  49. 				}
  50. 			}
  51. 		}
  52. 			);
  53. 		Thread t2 = new Thread(new Runnable(){
  54. 			@Override
  55. 			public void run(){
  56. 				for(int i=0;i<5;i++){
  57. 					c.printOdd();
  58. 				}
  59. 			}
  60. 		}
  61. 			);
  62. 		t1.start();
  63. 		t2.start();
  64.  
  65. 		t1.join();
  66. 		t2.join();
  67. 	}
  68. }
Success #stdin #stdout 0.11s 57396KB
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stdin
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Standard input is empty
stdout
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EVEN 0
ODD 1
EVEN 2
ODD 3
EVEN 4
ODD 5
EVEN 6
ODD 7
EVEN 8
ODD 9
EVEN 10
https://ideone.com/0aKKH5
language:
Java (HotSpot 12)
created:
2 days ago
visibility:
public

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