Day123 — one-line ArrayList in Android

1 min readNov 27, 2019

I want to have a ArrayList being accessible in an Activity. The content of that list is fixed and will not be changed in the life time of the Activity. Since there is no constructor in an Activity, that list is needed to be created in one line as a member variable.

How to initialize List object in Java?

I can not initialize a List as in the following code: List<String> supplierNames = new List<String>()…

stackoverflow.com

Efficiency of Java "Double Brace Initialization"?

In Hidden Features of Java the top answer mentions Double Brace Initialization, with a very enticing syntax: Set…

stackoverflow.com

Day123 — one-line ArrayList in Android

How to initialize List object in Java?

I can not initialize a List as in the following code: List<String> supplierNames = new List<String>()…

Efficiency of Java "Double Brace Initialization"?

In Hidden Features of Java the top answer mentions Double Brace Initialization, with a very enticing syntax: Set…

Written by Jacky Tsang

No responses yet

Day123 — one-line ArrayList in Android

How to initialize List object in Java?

I can not initialize a List as in the following code: List&lt;String&gt; supplierNames = new List&lt;String&gt;()…

Efficiency of Java "Double Brace Initialization"?

In Hidden Features of Java the top answer mentions Double Brace Initialization, with a very enticing syntax: Set…

Written by Jacky Tsang

No responses yet

I can not initialize a List as in the following code: List<String> supplierNames = new List<String>()…