fork(2) download
copy 
  1. /* package whatever; // don't place package name! */
  2.  
  3. public class Main {
  4.     public static void main(String[] args) {
  5.         MySemaphore mySemaphore = new MySemaphore();
  6.         new Send(mySemaphore).start();
  7.         new Receive(mySemaphore).start();
  8.     }
  9. }
  10.  
  11. class MySemaphore {
  12.     boolean flag = false;
  13.  
  14.     public synchronized void take() throws InterruptedException {
  15.         flag = true;
  16.         notify();
  17.     }
  18.  
  19.     public synchronized void release() throws InterruptedException {
  20.         while (!flag) {
  21.             wait();
  22.         }
  23.         flag = false;
  24.     }
  25. }
  26.  
  27. class Send extends Thread {
  28.     MySemaphore mySemaphore;
  29.  
  30.     public Send(MySemaphore semaphore) {
  31.         this.mySemaphore = semaphore;
  32.     }
  33.  
  34.     @Override
  35.     public void run() {
  36.         int i = 0;
  37.         while (i++ < 10) {
  38.             System.out.println("send");
  39.             try {
  40.                 mySemaphore.take();
  41.             } catch (InterruptedException e) {
  42.                 e.printStackTrace();
  43.             }
  44.         }
  45.     }
  46. }
  47.  
  48. class Receive extends Thread {
  49.     MySemaphore mySemaphore;
  50.  
  51.     public Receive(MySemaphore semaphore) {
  52.         this.mySemaphore = semaphore;
  53.     }
  54.  
  55.     @Override
  56.     public void run() {
  57.         while (true) {
  58.             try {
  59.                 mySemaphore.release();
  60.             } catch (InterruptedException e) {
  61.                 e.printStackTrace();
  62.             }
  63.             System.out.println("receive");
  64.         }
  65.     }
  66. }
Time limit exceeded #stdin #stdout 5s 380864KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
send
send
send
send
send
send
send
send
send
send
receive
https://ideone.com/d76Elw
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!