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Java Data Structures Tutorial

In this post, we feature a comprehensive tutorial on Java Data Structures. 1. What is a Data Structure? A data structure is a particular way of organising data in a computer so that it can be used effectively. The idea is to reduce the space and time complexities of different tasks.  Table Of Contents 1. What is a Data Structure? ...

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Basic Operators – OR in Java

Hello readers, in this tutorial, we will learn the operator OR in Java programming language. 1. Introduction Java programming offer Operators that are used to perform various operations . In this tutorial, we’ll only cover the OR operator that falls under the Conditional and Bitwise category. 1.1 Conditional operators in Java Following table list the different conditional operators. Operator Description ...

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Java Capitalize First Letter Example

In this post, we feature a comprehensive Java Capitalize First Letter Example. We want to write a Java program to convert first character uppercase in a sentence and if any character apart from the first one is in Uppercase then convert in into Lowercase. 1. Introduction Firstly, lets see how to capitalize the first letter of a single word, Example01: ...

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ADT Java Tutorial

This article will feature a comprehensive (Abstract Data Types) ADT Java Tutorial. Table Of Contents 1. What is Abstract Data Types (ADT) ? 2. Operations on ADT 3. ADTs in Java 3.1. List ADT 3.2. Stack ADT 3.3. Queue ADT 4. Which ADT to choose ? 5. Conclusion 6. References 1. What is Abstract Data Types (ADT) ? Let us ...

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Dynamic Array Java Example

An Array is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created. The length is fixed after creation. A dynamic array is a variable-size list data structure that allows elements to be added or removed. Dynamic arrays overcome a limit of static arrays, ...

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Big O Notation Java Example

In this post, we feature a comprehensive Big O Notation Java Example. 1. Introduction Asymptotic notations are used to analyze an algorithm’s running time by identifying its behavior as the input size for the algorithm increases. There are six symbols used to characterize the relative growth rates of functions: SymbolSummary f = Θ(g) f grows at the same rate as ...

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Char Array to String Java Example

Hello readers! In this tutorial we feature a comprehensive Char Array to String Java Example. We will learn different ways for this convertion. Meanwhile, you can also check the String to Char Array Example . 1. Introduction Java programming offers possible ways to convert a character array (char []) to String. A new String is allocated that represents the sequence ...

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Spring Boot Security and JWT Hello World Example

Hi Java Code Geeks. Come follow me as we create a Spring Boot Security and JWT (JSON Web Token) Hello World application. This article is best understood by following it from top to bottom. Concepts and definitions will be explained along the way. This article is not for the absolute beginner. It is assumed that you know your way around ...

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How to throw an exception in Java

In this article we will show How to throw an exception in Java. 1. What are Exceptions? Exceptions are events that occur during the execution of programs that disrupt the normal flow of instructions (e.g. divide by zero, array access out of bound, etc.). Exception objects can be thrown and caught. 2. Types of exceptions There are two types of exceptions in Java: checked ...

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Java Exceptions List Example

In this article we will discuss the Java exceptions list. We will discuss what are exceptions, when they occur and their types. 1. What is An Exception in Java? Exception is mechanism which Java uses to handle any unforeseen use-case/scenario. Basically an exception is thrown when either something unexpected happened during code execution which is not covered in any code ...

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