I'm trying to make a Tetris game and I'm getting the compiler error
Shape is not an enclosing class
when I try to create an object
public class Test {
public static void main(String[] args) {
Shape s = new Shapes.ZShape();
}
}
I'm using inner classes for each shape. Here's part of my code
public class Shapes {
class AShape {
}
class ZShape {
}
}
What am I doing wrong ?
A nested class is a member of its enclosing class. Non-static nested classes (inner classes) have access to other members of the enclosing class, even if they are declared private. Static nested classes do not have access to other members of the enclosing class.
not an enclosing class error is thrown because of your usage of this keyword. this is a reference to the current object — the object whose method or constructor is being called. With this you can only refer to any member of the current object from within an instance method or a constructor. Show activity on this post.
Creating an inner class is quite simple. You just need to write a class within a class. Unlike a class, an inner class can be private and once you declare an inner class private, it cannot be accessed from an object outside the class.
ZShape
is not static so it requires an instance of the outer class.
The simplest solution is to make ZShape and any nested class static
if you can.
I would also make any fields final
or static final
that you can as well.
Suppose RetailerProfileModel is your Main class and RetailerPaymentModel is an inner class within it. You can create an object of the Inner class outside the class as follows:
RetailerProfileModel.RetailerPaymentModel paymentModel
= new RetailerProfileModel().new RetailerPaymentModel();
What I would suggest is not converting the non-static class to a static class because in that case, your inner class can't access the non-static members of outer class.
Example :
class Outer
{
class Inner
{
//...
}
}
So, in such case, you can do something like:
Outer o = new Outer();
Outer.Inner obj = o.new Inner();
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