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 …