

Here is example of Java 8 convert Stream to Array like using ::new operator and IntFunction arguments. Stream
contains toArray
function using that we can convert Stream to Array.
Table of Contents
Example 1: Convert Stream to Array using ::new
toArray
return containing the elements of Array. toArray() return Array of Object while toArray(Employee[]::new) return array of Employee its describe as bellow:
java.util.List<Employee> employeeList = new ArrayList<>(); employeeList.add(new Employee(1, "Jone")); employeeList.add(new Employee(2, "Shone")); Employee[] employeesArray = employeeList.stream().toArray(Employee[]::new); // its will create Array of Employee // if you write employeeList.stream().toArray(); than it will create Array of Object
Example 2: Convert Stream to Array using IntFunction
Here is another version of
toArray
function of Stream class, Here we passed predefined size of array.
java.util.List<Employee> employeeList = new ArrayList<>(); employeeList.add(new Employee(1, "Jone")); employeeList.add(new Employee(2, "Shone")); Employee[] employeesArray = employeeList.stream().toArray(site->new Employee[site]); // here wee are password fix length Employee Array
References:
https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html
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