public?class?VolatileT?{
	private?int?number?=?0;
	
	public?int?getNumber(){
		return?this.number;
	}
	
	public?void?increase(){
		synchronized(this){
		this.number++;
		}
	}
	
	public?static?void?main(String[]?arg){
		final?VolatileT?vo?=?new?VolatileT();
		for(int?i=0;i<500;i++){
			new?Thread(new?Runnable(){
				@Override
				public?void?run()?{
					vo.increase();
				}
			}).start();
			//System.out.println(vo.getNumber());
			System.out.println(Thread.activeCount());
		}
		if(Thread.activeCount()>1){
			Thread.yield();
		}
		System.out.println("result="+?vo.getNumber());
	}
}