How can I have both of these constructors?

Question

I am making a tree based AI for a game originating in Nepal called Tigers and Goats (or Tigers and Sheep). I am now starting to make the classes for the trees, but I am running into an error where my constructors are the same, although they are using different types of list.

Here are my two constructors:

public MoveTree(List<MoveTree> children, MoveTree parent) { this.children = children; this.parent = parent; } public MoveTree(List<Move> moves, MoveTree parent) { this.moves = moves; this.parent = parent; }

I am using intellij and it is giving me the error shown here

How can I avoid this error while still having my two constructors? I want to be able to do this without changing my constructors too much so that I can have different ways of implementing this class for different purposes

Does this answer your question? Overloading a method: both methods have same erasure — Giorgi Tsiklauri
– Giorgi Tsiklauri, Commented Mar 24, 2021 at 22:51

Bohemian · Accepted Answer · 2021-03-24 22:52:40Z

You can't have both. Use the builder pattern (formal style - not shown here), or a factory method (easier - shown):

private MoveTree(MoveTree parent) { this.parent = parent; } public static MoveTree createWithMoveTree(List<MoveTree> children, MoveTree parent) { MoveTree moveTree = new MoveTree(parent); moveTree.children = children; return moveTree; } public static MoveTree createWithMoves(List<Move> moves, MoveTree parent) { MoveTree moveTree = new MoveTree(parent); moveTree.moves = moves; return moveTree; }

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