Java is a popular programming language that is widely used for developing a variety of applications. In order to run Java code, you need to have certain software components installed on your computer. These components include the Java Virtual Machine (JVM), the Java Development Kit (JDK), and the Java Runtime Environment (JRE). The JVM is the…
What are the features of Java Programming Language?
Java is a popular, versatile programming language that is widely used in a variety of applications, from enterprise software to mobile apps. Here are some of the key features that make Java a powerful and popular choice for developers: Object-Oriented: Java is a strictly object-oriented programming language, which means that all elements of the language are…
What is the difference between C++ and Java?
C++ and Java are both popular programming languages, but they have some key differences that make them better suited for different types of projects. C++ is a low-level programming language that is often used for system programming, game development, and other performance-critical applications. It is a compiled language, which means that the code is translated…
Constructor Overloading in Java
Constructor are used to create the objects . new keyword always calls the constructor of the class. Constructor name is always be the same as the name of the class .Generally in 99% code ,the name of the method is different from the name of the class . But the problem arises that method too can…
Fail Fast Vs Fail Safe Iterator In Java
Fail fast iterator while iterating through the collection , instantly throws Concurrent Modification Exception if there is structural modification of the collection. Fail Safe Iterator makes copy of the internal data structure (object array) and iterates over the copied data structure.Any structural modification done to the iterator affects the copied data structure. Fail Fast Iterator Fail Safe Iterator…
String vs StringBuilder vs StringBuffer in Java
String String is immutable ( once created can not be changed )object . The object created as a String is stored in the Constant String Pool. Every immutable object in Java is thread safe ,that implies String is also thread safe . String can not be used by two threads simultaneously. String once assigned can not be changed. StringBuffer…
Iterable interface in Java
The Iterable Interface is defined in java.lang package. The Iterable interface is the super interface in collection framework. It is the root interface for all the collection classes. The Collection interface extends the Iterable interface. So,all the subclasses that implementing the Collection interface also implement the Iterable interface. Implementing this interface allows an object to be the target of the enhanced “for each” statement. The for-each loop is used…
Iterator vs ListIterator in Java
Iterator ListIterator Can traverse all the collections including set, map, etc. It can be used to traverse only list type collection like ArrayList, LinkedList. Iterates the collection only in the forward direction. Can iterate over the collection in forward as well as backward direction. Cannot obtain indexes. Can obtain indexes. No way to add new elements…
Top 5 frequently asked questions on Iterator Interface in Java
Q #1) What is the Iteration in Java? Answer: An iteration is a process by which a code block is repeatedly executed until a given condition holds or doesn’t exist. Using iteration you can traverse through a sequence of elements or process the data. Q #2) How many types of Iterators are there in Java? Answer: Iterators are…
Iterable vs Iterator interfaces in Java.
Iterable Interface Iterator Interface Represents a collection that can be traversed using foreach loop. Allows to iterate over some other collection. The class that implements the iterable interface has to override iterator() method. hasNext() and next() methods of Iterator interface are to be overridden by class implementing it. Does not store the current state. Stores the…