Multiple methods

Question

can multiple methods be called like this?
Whatever class = new Whatever();
class.method1().method2().method3(param);

Answer 1

can multiple methods be called like this?
Whatever class = new Whatever();
class.method1().method2().method3(param);Why don't you do this?
class.method1(param);
public method1(param){
class.method2(param);
public method2(param){
class.method3(param);