[jira] [Resolved] (NETBEANS-479) New Java Hint to replace explicit type of variable with var

["ARUNAVA SINHA (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NETBEANS-479?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ARUNAVA SINHA resolved NETBEANS-479.
------------------------------------
       Resolution: Fixed
    Fix Version/s: Next

merged into apacehe:master through https://github.com/apache/incubator-netbeans/pull/463

> New Java Hint to replace explicit type of variable with var
> -----------------------------------------------------------
>
>                 Key: NETBEANS-479
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-479
>             Project: NetBeans
>          Issue Type: Improvement
>            Reporter: ARUNAVA SINHA
>            Assignee: ARUNAVA SINHA
>            Priority: Trivial
>              Labels: JDK10-LVTI
>             Fix For: Next
>
>
> The IDE will include a prompt to replace the explicit types with ‘var’, when the type can be inferred from the context.
> e.g.., String str = new String("Hello");
> can be replaced with var str = new String("hello");
> Preconditions for the hint:
>  # hint will be enabled only for JDK10 or higher
>  # hint willwork only inside local scope
>  # hint will be disabled if var type is already present.
>  # hint will not support generic array.
>  e.g., Arraylist[] arr = new ArrayList[5];
> Explicit type of local variable will be converted to var type if type of variable is same as assignment type
>  Below Scenarios will be covered:
>  # Object Initialization:
>  Integer i = new Integer("10");
>  Fix : var i = new Integer("10");
> HashMap<Integer,Integer> map= new HashMap<Integer,Integer>();
>  Fix : var map= new HashMap<Integer,Integer>();
>  # Array Initialization
>  int[][]arr = new int[3][];
>  Fix : var arr = new int[3][];
>  # Assignment of literal:
>  int a = 10;
>  Fix: var a = 10;
>  # Assignment to a method call
>  var list = Collections.unmodifiableList(new ArrayList()) ;
> Below Assignment scenarios will be excluded :
>  # Anonymous Object
>  # Lambda expression
>  # Diamond interface



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