Object expression

An object expression is equivalent to Java's anonymous class. It is used to instantiate objects that might inherit from some class or that implements an interface. A classic use case is when we need to define objects that are implement an interface. This is how in Java we could implement the ServiceConnection interface and assign it to a variable in Java:

    ServiceConnection serviceConnection = new ServiceConnection() { 
        @Override 
        public void onServiceDisconnected(ComponentName name) { 
            ...
        } 
 
        @Override 
        public void onServiceConnected(ComponentName name, 
            IBinder service) 
        {
            ... 
        } 
    } 

The closest Kotlin equivalent of the preceding implementation is the following:

    val serviceConnection = object: ServiceConnection { 
 
     override fun onServiceDisconnected(name: ComponentName?) { } 
 
     override fun onServiceConnected(name: ComponentName?, 
         service: IBinder...