fork(1) download 
  1. import java.io.FileWriter;
  2. import java.io.IOException;
  3.  
  4. class Synchro {
  5.     private FileWriter fileWriter;
  6.  
  7.     public Synchro(String file) throws IOException {
  8.         fileWriter = new FileWriter(file, true);
  9.     }
  10.     public void close() {
  11.         try {
  12.             fileWriter.close();
  13.         } catch (IOException e) {
  14.             e.printStackTrace();
  15.         }
  16.     }
  17.     public synchronized void writing(String str, int i) {
  18.         try {
  19.             System.out.print(str + i);
  20.             fileWriter.append(str + i);
  21.             Thread.sleep((long)(Math.random() * 50));
  22.             System.out.print("->" + i + " ");
  23.             fileWriter.append("->" + i + " ");
  24.         } catch (IOException ex) {
  25.             System.out.print("Error of reading");
  26.             ex.printStackTrace();
  27.         } catch (InterruptedException e) {
  28.             System.err.print("Error of stream");
  29.             e.printStackTrace();
  30.         }
  31.     }
  32. }
  33.  
  34. class MyThread extends Thread {
  35.     private Synchro s;
  36.  
  37.     public MyThread(String str, Synchro s) {
  38.         super(str);
  39.         this.s = s;
  40.     }
  41.     public void run() {
  42.         for (int i = 0; i < 5; i++) {
  43.             s.writing(getName(), i);
  44.         }
  45.     }
  46. }
  47.  
  48. public class SynchroThreads {
  49.     public static void main(String[] args) {
  50.         try {
  51.             Synchro s = new Synchro("C:\\Users\\~\\Downloads\\data.txt");
  52.  
  53.             MyThread t1 = new MyThread("First", s);
  54.             MyThread t2 = new MyThread("Second", s);
  55.             t1.start();
  56.             t2.start();
  57.             t1.join();
  58.             t2.join();
  59.             s.close();
  60.         } catch (Exception ex) {
  61.             ex.printStackTrace();
  62.         }
  63.     }
  64. }
  65.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
Java HotSpot(TM) Client VM warning: No monotonic clock was available - timed services may be adversely affected if the time-of-day clock changes
Main.java:48: error: class SynchroThreads is public, should be declared in a file named SynchroThreads.java
public class SynchroThreads {
       ^
1 error
stdout 
Standard output is empty
https://ideone.com/Cparea
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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