public boolean find(int value) {
		System.out.println("happen " + this.value);
		if (value == this.value) {
			return true;
		} else if (value > this.value) {
			if (right == null)
				return false;
			return right.find(value);
		} else {
			if (left == null)
				return false;
			return left.find(value);
		}

	}