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Wrapper Class Java Example

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1. What is a wrapper class A wrapper class in Java is a way to convert a primitive data type such as boolean, int, etc. into an object. Also, we can convert an object of a wrapper class into its corresponding primitive type. In this article we are going to talk about why we need wrapper classes, autoboxing, and autounboxing. ...

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Java Comments

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Comments in Java are non-executable statements that are used to provide additional information about some piece of code logic, method, or class. In this article, we shall discuss types of comments, and when and how to write them. 1. Comments in Java and their types Comments are non-executable statements that are provided to understand code better. These are usually provided ...

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Java Bean Example

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In this example, we are going to demonstrate how to use and configure the Java Bean. 1. Introduction In computing based on the Java Platform, JavaBeans are classes that encapsulate many objects into a single object (the bean). They are serializable, have a zero-argument constructor, and allow access to properties using getter and setter methods. The name “Bean” was given ...

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Timestamp Java Example

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In this article we will create a Timestamp Java Example and Timestamp sql. 1. Introduction In a typical application, there are a lot of events like orders receipt, payment request sent, users logging in, orders shipping to name a few. The events may also be negative such as network failure, invalid user login, product failure so on. To answer questions ...

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How to create an Array in Java

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In this article, we will see How to create an Array in Java. You can check how to use arrays in Java in the following video: Java Array Example – How to use Arrays in Java 1. What is an array? An array is a data structure used as a container to store a collection of elements with the same ...

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Copy Constructor Java Example

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In this tutorial, we shall discuss the Copy Constructor in Java. In the world of object-oriented programming, a copy constructor is a special type of constructor that takes an object of the same class as an argument and returns a duplicate or a copied instance of the input object initialized with the values of the member variables of the passed ...

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Serializable Java Example – How to serialize and deserialize objects

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In this article, we will discuss what is Serializable in Java using examples and how to serialize and deserialize objects. Serialization in java is the process of converting an object into a stream of bytes. You can also check this tutorial in the following video: Java Serialization Tutorial – video 1. Introduction De-serialization is the reverse process which converts a ...

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PriorityQueue Java Example

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In this article, we will discuss what is the PriorityQueue in Java – , we will create a java priorityqueue example , and we will analyze java.util.PriorityQueue which extends the java.util.AbstractQueue class and implements the Serializable interface. You can also check the Java Queue Example in the following video: Java Queue Example – Video 1. Introduction An unbounded priority queue ...

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ArrayList to Array Java Example

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In this tutorial, we will look at various ways to convert ArrayList to array java and we will discuss the efficient approach for it. 1. ArrayList to Array in Java The first step for our example is to create an ArrayList List numbers = new ArrayList(); final int endRange = 100000000; IntStream.range(0, endRange).forEach(value -> { numbers.add(value + 1); }); We ...

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Java Import Keyword Example

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In this example, we will learn about the Java Import keyword. We will talk about Java packages and their types and what problems an import keyword solves when programming in Java. TipYou may skip the packages section and jump directly to the Import keyword section below. 1. Packages A java package is used to group related types(classes, interfaces, enumerations, and ...

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