@Controller :- @Controller is a spring MVC annotation to define a controller ,but in reality it’s just a Stereotype annotation. => You can even create a controller without @Controller by annotating the Spring MVC Classes using @Component annotation. The real …
Ans :- some features which are included in JAVA8 are as follows- 1.Lambda Expression. 2.Stream API 3.Default methods & Static Methods in Interface 4.Optional 5.Functional Interface 6.Method References 7.DATE and API 1.Lambda Expression :- Lambda expression is an Anonymous function, …
The Java ExecutorService is an interface which is present inside java.util.concurrent package. The ExecutorService interface is a subinterface of the Executor interface. It allows us to execute tasks asynchronously on threads. It allows us to submit tasks for execution. With …
Ans :- s.No Spring Spring Boot 1. Spring framework is widely used Java EE framework for building the applications. Spring boot Framework is widely used to develop Rest APIs 2. The primary feature of the Spring Framework is dependency injection. …
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In Java, the equals method present inside Object class, and it is used to compare the equality of two objects. If our class doesn’t contain .equals() method then Object class .equals() method will be executed which is always meant for …
Ans:- stream will perform the following operations:- 1.Intermediate operations2.Terminal operations 1.Intermediate operations:- the operations which are performed in b/w streams of objects are known as Intermediate operations. a. filter()b.map()c.sorted()d.distinct()e.peek() 2.Terminal operations:- the operations which are performed at the end of …
SOLUTION :- Test.java package p2 ; import java.util.ArrayList; import java.util.List; import java.util.stream.Collectors; public class Test { public static void main(String[] args) { List<Employee> list= new ArrayList<>(); list.add(new Employee(1, “James”, 70000)); list.add(new Employee(2,”David”,15000)); list.add(new Employee(3,”Iila”,5000)); List<Employee> list1=list.stream().filter(i->i.getSalary()>20000).collect(Collectors.toList()); // System.out.println(list1); for(Employee e:list1) …
Ans :- stream is an interface from java.util.stream package which supports stream of objects,which means continuous flow of objects. Stream<T> will perform the following operations:- a. Intermediate operations b.Terminal operations => The stream API is needed for several reasons:- 1.Functional …
Ans :- Yes, you can use lambda expressions in java for any interface that has only one abstract method. Such interfaces are known as functional interfaces, and lambda expressions provide a concise way to implement the abstract method of a …
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Ans :- Functional interfaces are those interfaces which can have only one abstract method . It can have any number of default and static methods. functional interfaces already present in javaLib such asexample:Runnable,Callable,Supplier,Consumer,Bi- Consumer,Predicate, Bi -Predicate