Java

21.What is the purpose of IntSupplier functional interface? It represents a supplier of int-valued results.

11.What is the purpose of DoublePredicate functional interface? It represents a predicate (Boolean-valued function) of one double-valued argument.

1.What are functional interfaces? Functional interfaces have a single functionality to exhibit. For example, a Comparable interface with a single method ‘compareTo’ is used for comparison purpose. Java 8 has…

1.What is JVM? The Java interpreter along with the runtime environment required to run the Java application in called as Java virtual machine(JVM) 2. What is the most important feature…

1.Struts2 Apache Struts 2 is an enterprise-ready web framework for Java application. It has been designed to streamline the entire development cycle starting from building to deploying. Struts 2 is…

java.io: For input and output of data. java.lang: It is used for providing core functionality. java.lang.ref: It is used to enable interaction with garbage collector. java.lang.reflect: It is used to…

1.which two method you need to implement for key object in HashMap?              In order use any object as key in HashMap,it must implements equals…

What is the difference between a constructor and a method? A constructor is a member function of a class that is used to create objects of that class. It has…