Java -> C# Creating Anonymous Instance of Abstract Class

Question

for training purposes I am following along a Tutorial written for Java, which I successfully \'translated\' into C# so far, however, I am facing now a problem for which I don\'t

Answer 1

There are no anonymous classes in C#, but you have two ways of achieving the same result:

• Make private, nested, named classes, and reference them in the array initializer, or
• Make a constructor take a delegate for each abstract method that you plan to override.

The first approach is self-explanatory, but the code would be quite a bit longer. The named classes should be OK, because they are private to the implementation of your publicly visible class.

The second approach could look as follows:

public class LevelUpOption {
  private String name;
  public String name() { return name; }

  public LevelUpOption(String name, Action<Creature> invoke){
    this.name = name;
    this.invoke = invoke;
  }

  public readonly Action<Creature> invoke;
}

Now you can initialize your array like this:

private static LevelUpOption[] options = new [] {
    new LevelUpOption("Increased hit points", c => c.gainMaxHp() ),
    new LevelUpOption("Increased attack value", c => c.gainAttackValue()),
    ...
};

Since invoke is a delegate, the syntax of calling it is the same:

options[i].invoke(myCreature);