Error when create list of offset with value in flutter

Question

Create a list in my code of offset but show me an error with the below code

final List<Offset> p = List<Offset>(6);

Error:

The default 'List' constructor isn't available when null safety is enabled. (Documentation)
Try using a list literal, 'List.filled' or 'List.generate'.

But I can't convert it into literal with the (6) value because I have no knowledge of this!

Answer 1

This type of initialization has become invalid because dart now supports null-safety.

Change the initialization to:

final List<Offset> p = List.filled(6, <Your Initial Offset Value Here>)

Example :

final List<Offset> p = List.filled(6, const Offset(0, 0));

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Extra: You can even try the below code if you want empty list.

List<Offset> p = List<Offset>.empty(growable: true); // []

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Further Reference:

• The default 'List' constructor isn't available when null safety is enabled. Try using a list literal, 'List.filled' or 'List.generate'
• https://github.com/dart-lang/language/issues/746