Doubt related object

#1

can we make object outside the main method? why we have used this keyword in stack using array in all methods like in size method ,top method and in other also ?

#2

You CAN create objects outside of main, but inside some OTHER method.

we have used this keyword to indicate that we are using the property of class…whenever an object calls any of its member function then the reference of the object is implicitly passed using the this keyword…
consider this example…

class A{
int a;
void seta(int a){
    this.a=a;//if i dont write this then compiler will get confused as we have a local variable named as a also
}
}
#3

can we create object inside constructor also?

#4

probably you can intialize objects inside constructors

class B{
}
class A{
   B b;
   A(){
       b=new B();
    }
}
#5

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