how can i create instance of inner class outside its enclosing class?

Question

class Main
{
int a=10;
void display()
{
System.out.println(a);
Inner in=new Inner();
in.display();
}
class Inner
{
int c=20;
void display()
{
System.out.println("a= "+a);
System.out.println(c);

}
}

}
class Innerclasses
{
public static void main(String ar[])
{
Inner m2=new Inner()); // here i want to create instance of inner class, but java compiler shows error
m2.display();
}
}

Answer 1

new main().new innor();

Answer 2

there are some obvious syntax error in your code. are those typos?

1. variable a is not defined in class Inner

2. there's an extra closing parenthesis in this line of class Innerclasses: Inner m2=new Inner());



fix those and it should be ok.



by the way, make sure those 2 or 3 classes are inside the same package. i don't know the use of class Main. Innerclasses and Main are almost the same, you should have get it in the first place. you have instantiated class Inner in there, see.

Answer 3

Inner m2=new Inner()); extra bracket

Is it the problem



No. No.

You can not create inner class objects in outside classes, I think