Let's say I have POJO with getters and setters of different types. I want to write some generic algorithm for updating data from one to another based on just defining getters and setters via lambdas. I'm trying to create it this way
This question already has an answer here:I've seen a lot of methods where a new class is instantiated in a lambda method reference but can't seem to understand why. When is the new keyword needed in a method reference?
How can I bind a Java Supplier to an existing instance of an Object? For example, if I want to write my own compareTo() method with this header:
I'm trying to print out basic hashmap with twoin java. But I can't figure out how to print multiple parameters, when it comes to method reference in java8.
As I know lambda expression can be replaced by method reference without any issues. My IDEs say the same, but the following example shows the opposite. The method reference clearly returns the same object, where as lambda expression returns new objects each time.
What is the difference between the following method references,Do the cases have special names? Is there any example similar to the usage?
I was under the impression that Foo::new is just syntactic sugar for () -> new Foo() and they should behave identically. However it seems not to be the case. Here's the background:
I'm studying the new Stream API for the OCP exam and I found something that I don't really understand. Here's my code: