sample_volatile.java

//import java.io.*;
//import java.util.*;

class my_class{
	public String s1;
	// ýòî âíóòðåííÿ äèðåêòèâà äëÿ êîìïèëÿòîðà, íèêàê íå ïðîÿâëÿåòñÿ, 
	// ñëóæèò äëÿ ïîñòîÿííîãî îòîáðàæåíèÿ ðåàëüíîãî çíà÷åíèÿ, 
	// à íå êàê êîíñòàíòà ìåæäó îäíèì ïðèñâàèâàíèå è âòîðûì, êîãäà êîìïèëÿòîð âèäèò åå êàê êîíñòàíòó
	// è åñëè íå ñòîèò volatile, òî èçìåíåíèÿ â ýòî âðåìÿ äðóãèì ïîòîêîì íå äàäóò ðåçóëüòàòà
	// boolean volatile value=true;
	// while(value){System.out.println(++i)};
	// åñëè îáðàòèòüñÿ êàê this.value=false âûéäåò èç öèêëà, åñëè óáðàòü volatile - âû÷íûé öèêë 

	public volatile String s2;// ïåðåìåííàÿ, êîòîðàÿ ìîæåò áûòü èçìåíåíà â ëþáîå âðåìÿ äðóãèì ïîòîêîì
	my_class(String s1,String s2){
		this.s1=s1;
		this.s2=s2;
	}
}
class my_thread implements Runnable{
	private my_class temp=null;
	private String name=null;
	my_thread(my_class temp,String thread_name){
		this.temp=temp;
		this.name=thread_name;
		(new Thread(this)).start();
	}
	public String toString(){
		return name+"  s1:"+temp.s1+"  s2(volatile):"+temp.s2;
	}
	public void run() {
		System.out.println(this);
		this.temp.s2=this.name;
		System.out.println(this);
	}
	
}
public class temp {
	public static void main(String args[]){
		my_class temp=new my_class("string one","string two");
		my_thread one=new my_thread(temp,"one");
		my_thread two=new my_thread(temp,"two");
	}
}