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Java Articles
Page 111 of 450
Java multiplyExact() in Math
In Java, multiplyExact() is an in-built static method of the Math class that accepts two arguments and returns their product as a result. This method can accept values of either integer or long type. One important point to note is that it may throw an exception if the produced result overflows the size of integer. After knowing the functionality of multiplyExact() in Java, one question that may pop into one's mind is that we can also use '*' operator to multiply two operands then why do we need multiplyExact() method. We are going to answer this question and also, explore ...
Read MoreIntUnaryOperator Interface in Java
IntUnaryOperator Interface, a functional interface of Java that performs an operation on a single integer-valued operand and also returns an integer value as a result. Since it is a functional interface, we can use it as an assignment target for the lambda expressions or method references. Here, the functional interface means an interface that contains only a single abstract method and exhibits single functionality. Some examples of functional interfaces are Predicate, Runnable, and Comparable interfaces. The IntUnaryOperator interface is defined in the 'java.util.function' package. In this article, we are going to explore the IntUnaryOperator Interface and its built-in methods with ...
Read MoreDifferent name reusing techniques in Java
In Java, there exist different name reusing techniques for various types of entities, sucha s variables, methods, datatypes or packages. These techniques affect the accessibility and behavior of the entities according to their need and use. In this article, we will discuss four common ways to reuse a name in Java: overriding, hiding, overloading and shadowing Name reusing techniques in Java Shadowing This technique allows a local variable to have the same name as another field or member of the enclosing class. In this case, the previous implementation of the member gets shadowed by the declaration of a new variable. ...
Read MoreWhy does an online Judge crash during an online Programming Contest?
We all are well aware are that now-a-days various coding platforms include competitive codings, for example GeeksforGeeks, CodeChef, Codeforces, atCoder, SPOJ, HackerRank, HackerEarth, and many more where they supposed to code out by themselves by either attaching local editor file such as a sublime editor or by directly writing on their respective editors. So how are these test cases getting accessed or in an easy way we can say that our code is getting compiled and run? On these programming platforms for competitive programming online judges act as the backbone for code compilation and run. Online Judge To judge ...
Read MoreLeft Shift Operator in Java
The execution of instructions in programming languages involves the operation of various symbols referred to as "operators." Operators tell computers what action/value evaluation should be performed throughout set codes. Arithmetic-based operates consist of performing essential calculations like addition/subtraction/multiplication/division. Played out with relational-oriented operates that indicate interactions between any two values and analyzes when one is greater/equal/less with regards to another value - showing its relevance under certain conditions. Logical-operates' primary role often includes merging diverse quality statements into significant arguments either as True/False statement criteria based on developers' intentions efficiently using all three indispensable operator types. Left Shift Operator in ...
Read MoreWhich Data Type cannot be stored in Java ArrayList?
An ArrayList is a dynamic list of objects and you can't store primitive values like int, double, char or long in an ArrayList. The creation of wrapped class in java allows for holding of primitive data types and each object belonging to these types holds a single value for its respective primitive data type (int, double short or byte).To work with primitive data types in Java structures like JLists or ArrayLists which require objects, we need to use wrappers, and this article explains how to use ArrayList to store simple data types such as int and char. Primitive Data types ...
Read MoreAsynchronous and synchronous callbacks in Java
Sun Microsystems initially introduced Java, a programming language and computing platform, in 1995. It has grown from its modest origins to power a significant portion of the digital world of today by offering the solid foundation upon which numerous services and applications are developed. Java is still used in cutting-edge goods and digital services that are being developed for the future. What is Asynchronous and Synchronous in Java? Java's asynchronous programming paradigm enables teams to distribute workload and develop application features apart from the main application thread. The code is then synchronised with the main thread when the team is ...
Read MoreConstructor overloading with static block in Java
The act of instantiating an object calls forth its corresponding constructor underpinning much of the functionality present in object-oriented programming. Notably, a default constructor invariably exists within any given program employing objects - created seamlessly by the compiler for effortless utilization. In this discourse, we shall delve into constructor overloading with a static block in Java. Constructor overloading is a concept of defining multiple constructors with different parameters in a class. Syntax Public class class_name { Class_name() { } Class_name(par1, par2..) { } } Using a constructor ...
Read MoreObject Pool Design Pattern
A software design pattern that is frequently used in Java programming to maximize the utilization of objects is called the Object Pool Design Pattern. The pattern controls how items are created and destroyed in a pool. The management of object production and destruction is done using the Object Pool Design Pattern. The concept behind the pattern is to accumulate reusable objects rather than making new ones each time one is required. For circumstances when the cost of producing new objects is significant, such as in network connections, database connections, or costly objects, Java programmers frequently employ the Object Pool Design ...
Read MoreMigration to Open JDK from Oracle JDK
Let's start by talking about the need for migration. Accordingly, from January 2019, enterprises will have to buy commercial licenses (i.e, from Oracle) to obtain software upgrades, as oracle declared in the year 2018. maintain oracle java, update to the most recent patch level, and pay the membership fees. You may get a sense of the price by knowing that each server core needs to be licensed, and each core costs US $25 per month. Additionally, even if there is only one Java Server in the cluster, the license price would apply to all "cores" of the server if it ...
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