Java constructor reference assignment Vs new created object assignment -


i met in our project following code:

myinterface var = myclass::new; 

is there difference with

myinterface var = new myclass(); 

lazy?

myinterface var = new myclass(); 

creates instance of myclass , assigns variable of type myinterface. requires myclass implements myinterface , have no-arg constructor. result instance of myclass implements myinterface likes to.


myinterface var = myclass::new; 

attemps implement myinterface ad-hoc. requires myinterface in functional interface having single abstract method. single abstract method must have return type assignable myclass , parameter list matching 1 of myclass’ constructors.

it analog of:

myinterface var = new myinterface() {     public myclass anymethodname() {         return new myclass(); } 

the result instance of myinterface on invocations of single abstract method create new instance of myclass passing of arguments constructor of myclass.


in other words, these 2 constructs have nothing in common.


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