public class Leaf{
int i=0; Leaf(int i){this.i=i;} Leaf increament(){ i++; return this; } void print(){System.out.println("i="+i);} public static void main(String[] args){ Leaf leaf=new Leaf(100); Leaf leaf1 = leaf.increament(); Leaf leaf2 = leaf1.increament(); leaf2.print(); } }