importjava.util.*;classJavaExample{publicstaticvoidmain(Stringargs[]){//ArrayListArrayList<String>arrList=newArrayList<>();arrList.add("Apple");arrList.add("Orange");arrList.add("Banana");arrList.add("Mango");//LinkedListLinkedList<String>linkList=newLinkedList<>();linkList.add("Beans");li...
An abstract class, like an interface, will contain methods. However, there always will be at least one method that hasn’t been completed. This is one major difference between an abstract class and an interface. The abstract class will provide a guideline (a base class definition) from which...
Like PATH, there is another variable of similar nature that is CLASSPATH. This variable is set to locate.classfiles while compiling java programs in case they have any dependency. Both, PATH and CLASSPATH are environment variables and we need to set them while working with Java programming lan...
Some of the popular interview questions are “What are differences between abstract class and interface“. “When will you use abstract class and when will you use interface“. So in this article ,we will go through this topic. Table of Contents [hide] Abstract class Interface: Abstract class...
or the child interface to implement according to its requirements. If the number of methods grows a lot, it’s not a bad idea to provide a skeletal abstract class implementing the child interface and providing flexibility to the subclasses to chose between interface and an abstract class....
Difference between String Class and String buffer class String class is Immutable whereas String Buffer class is Mutable. String class consumes more memory whenever we append too many strings, whereas String buffer consumes very less memory.
relationshipbetween the 2 classes. For instance, if we have an abstract base class called "Canine", any deriving classshouldbe an animal that belongs to the Canine family (like a Dog or a Wolf). The reason we use the word "should" is because it is up to the Java developer to ensure...
The major difference between Enumeration and Iterator in java is that by using Enumeration, we can only traverse a Collection but by using Iterator, we can also remove an element while traversing the Collection.
JAVA COLLECTIONS ArrayListandVectorboth use Array as a data structure internally. However there are few differences in the way they store and process the data. In this post we will discuss the difference and similarities between ArrayList and Vector. ...
This tutorial explains the difference between size and length in Java. We have also listed some sample codes to help you understand the topic. Java has a size() method and a length property. Beginners may think that they are interchangeable