java this的经典使用

class Leaf{
	int i ;
	Leaf increment() {
		i++;
		return this;
	}

	public void print() {
		System.out.print("i"+i);
	}
	public static void main(String[] args) {
		Leaf lf = new Leaf();
		lf.increment().increment().increment();
		lf.print();
	}

}