Example
public
class
Outer {
private
final
class
Inner1 {
private
final
class
Inner2 {
private
final
class
Inner3 {
}
}
}
}
Solution
Move all nested inner classes to the outer-most inner class level.
public
class
Outer {
private
final
class
Inner1 {}
private
final
class
Inner2 {}
private
final
class
Inner3 {}
}