| package demo |
| |
| internal interface WindowListener { |
| fun windowClosing() |
| } |
| |
| internal interface EmptyWindowListener |
| internal open class EmptyWindowAdapter |
| |
| internal open class WindowAdapter : WindowListener { |
| override fun windowClosing() {} |
| } |
| |
| internal open class Frame { |
| fun addWindowListener(listener: WindowListener) {} |
| } |
| |
| internal class Client : Frame() { |
| init { |
| val a = object : WindowAdapter() { |
| override fun windowClosing() {} |
| } |
| |
| addWindowListener(a) |
| |
| addWindowListener(object : WindowAdapter() { |
| override fun windowClosing() {} |
| }) |
| |
| val b = object : EmptyWindowListener { |
| |
| } |
| val c = object : EmptyWindowAdapter() { |
| |
| } |
| } |
| } |