JAvaマルチスレッドの面接問題

package TreaditionThread;

public class TreadtionnalThreadMian {
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		final  Business business = new Business();
		new Thread(new Runnable(){

			public void run() {
				// TODO Auto-generated method stub
				for (int i = 0; i < 50; i++) {
					business.sub(i);
				}
			}
			
		}).start();
		
		for (int i = 0; i < 50; i++) {
			business.main(i);
		}
	}
}
class Business {
	private boolean bShuldBusi = true;
	
	public synchronized void sub(int i){
		while(!bShuldBusi){
			try {
				this.wait();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		for (int j = 0; j < 10; j++) {
			System.out.println("sub Thread"+j+" loop in "+i);
		}
		bShuldBusi = false;
		this.notify();
	}
	public synchronized void main(int i){
		while(bShuldBusi){
			try {
				this.wait();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		for (int j = 0; j < 100; j++) {
			System.out.println("main Thread"+j+" loop in "+i);
		}
		bShuldBusi = true;
		this.notify();
	}
}