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In Java, the this keyword is a reference variable that is used to refer to the current object within a method or constructor. It is particularly useful in situations where instance variables and parameters have the same names, helping to distinguish between the two and avoid naming conflicts. Key Uses of the this Keyword Distinguishing […]
Constructors in Java are special methods within a class that are used to initialize objects of that class. They have the same name as the class and do not have a return type, not even void. Constructors are automatically invoked when an object is created using the new keyword. Key Points about Constructors Name and
In Java, classes and objects are fundamental concepts of object-oriented programming (OOP). A class is a blueprint for creating objects, which are instances of that class. Objects, in turn, encapsulate data and behaviour associated with a specific entity. Class Definition in Java In Java, a class is defined using the class keyword, followed by the
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OOP Concepts Scenario from Banking System In a banking system, Object-Oriented Programming (OOP) concepts are crucial for modeling and managing various aspects of the system. Here are OOP concepts applied to a banking system: Classes and Objects Account Class: Represents customer bank accounts. Each account is an object of this class. Customer Class: Represents bank
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Object-Oriented Programming (OOP) is a fundamental programming paradigm that has revolutionized the way software is developed, designed, and maintained. OOP provides a structured and organized approach to modelling real-world entities, their behaviours, and their interactions within computer programs. In this introduction, we will explore the core principles and concepts of OOP, its benefits, and its
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1. Simple if Statement This program checks whether the entered number is positive. If the condition is true, it prints that the number is positive. 2.If-Else Statement This program determines whether the entered number is even or odd. It uses the if-else statement to display the appropriate result. 3. Nested If This program compares three
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The StringBuilder class in Java is a mutable sequence of characters. Unlike the String class, StringBuilder objects can be modified without creating new objects. It is similar to StringBuffer but is not synchronized, making it faster for use in single-threaded applications. Features of StringBuilder: Mutability: Modifying a StringBuilder object does not create a new object.
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The StringBuffer class is part of the java.lang package and is used to create and manipulate mutable (modifiable) strings in Java. Unlike the String class, which is immutable, the StringBuffer class allows you to modify the contents of a string without creating new objects each time, which improves performance when performing repeated string concatenation or
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The String class in Java is one of the most widely used and important classes in Java programming. It represents a sequence of characters and is used for storing and manipulating text. The String class is part of the java.lang package, which is automatically imported. In Java, strings are immutable, meaning once a String object
1. One-Dimensional Array practice program-1 This program stores elements in an array and displays them. It uses a for loop to access and print each array element. 2. One-Dimensional Array practice program-2 This program calculates the sum of all elements in an array. It traverses the array and adds each element to a sum variable.
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