Java Programming Overview

<p>JavaFX</p> Signup and view all the answers

<p>It provides essential APIs for fundamental Java functionalities.</p> Signup and view all the answers

<p>It defaults to the default access modifier, providing access only within the same package.</p> Signup and view all the answers

<p>Methods declared as private are accessible only within the class they are defined in.</p> Signup and view all the answers

<p>They can be accessed within the same package or by subclasses in different packages.</p> Signup and view all the answers

<p>It allows classes, methods, or data members to be accessed from anywhere in the program.</p> Signup and view all the answers

<p>Dynamic binding refers to linking a procedure call to code only at runtime, which is crucial for polymorphism.</p> Signup and view all the answers

<p>It establishes communication by creating classes that define objects and their behaviors.</p> Signup and view all the answers

<p>Polymorphism allows different classes to be treated as instances of the same class through a common interface.</p> Signup and view all the answers

<p>Understanding access modifiers is crucial for managing the visibility and encapsulation of classes and their members.</p> Signup and view all the answers

<p>Java supports key OOP concepts such as classes, inheritance, abstraction, encapsulation, and polymorphism.</p> Signup and view all the answers

<p>Java achieves platform independence through the use of bytecode, which can be executed on any system with a Java Virtual Machine (JVM).</p> Signup and view all the answers

<p>Java handles memory management automatically through garbage collection, while C++ requires manual memory management using pointers.</p> Signup and view all the answers

<p>Java supports one-dimensional arrays and two-dimensional arrays; for example, <code>int[] arr = {1, 2, 3}</code> for one-dimensional and <code>int[][] arr2D = {{1, 2}, {3, 4}}</code> for two-dimensional.</p> Signup and view all the answers

<p>The JDK provides tools necessary for developing Java applications, including the Java compiler (<code>javac</code>) and the runtime environment.</p> Signup and view all the answers

<p>The 'main' method serves as the entry point for Java applications, where execution begins.</p> Signup and view all the answers

<p>Encapsulation restricts direct access to an object's data and allows it to be modified only through methods, enhancing security and maintainability.</p> Signup and view all the answers

<p>Multithreading allows concurrent execution of two or more threads, improving application performance and resource utilization.</p> Signup and view all the answers

<p>The JVM interprets the bytecode, which is the intermediate machine language generated by the Java compiler, and executes it on a specific platform.</p> Signup and view all the answers

<p>Java API packages provide a collection of tools and utilities, such as classes and interfaces, to facilitate various programming tasks, including input/output operations and data structure management.</p> Signup and view all the answers

<p>Java EE extends Java SE by incorporating specifications for features commonly used in large-scale commercial applications, such as web services and enterprise-level security.</p> Signup and view all the answers

<p>The java.applet package contains classes necessary for creating applets, which are small applications that run in a web browser.</p> Signup and view all the answers

<p>Java SE is designed for general-purpose computing, while Java ME is tailored for mobile and embedded devices with limited resources.</p> Signup and view all the answers

<p>The java.util package provides collection classes, event models, date and time handling, and utility classes such as string tokenizers.</p> Signup and view all the answers

<p>The Java compiler translates Java source code into intermediate bytecode, which is then executed by the JVM.</p> Signup and view all the answers

<p>Platform independence means that Java applications can run on any operating system that has a compatible JVM without needing recompilation.</p> Signup and view all the answers

<p>Documentation comments are used to provide descriptions and explanations for classes, methods, and fields in Java code.</p> Signup and view all the answers

<p>The package declaration is optional because a Java program can exist without specifying a package, though it helps in organizing classes.</p> Signup and view all the answers

<p>Import statements are used to bring other classes or entire packages into visibility within a Java program.</p> Signup and view all the answers

<p>An interface in Java is a collection of method declarations without implementations, defined using the <code>interface</code> keyword.</p> Signup and view all the answers

<p>The class definition is mandatory because all Java code must reside within a class structure.</p> Signup and view all the answers

<p>The main method serves as the entry point of execution for a Java program and is required for the program to run.</p> Signup and view all the answers

<p>'Static' means that the main method can be called without creating an instance of the class.</p> Signup and view all the answers

<p>Tokens are the smallest individual units in a program, including keywords, operators, separators, and literals.</p> Signup and view all the answers

<p>In C++, memory management is manual, requiring the use of operators like <code>delete</code>, while Java uses automatic garbage collection for memory management.</p> Signup and view all the answers

<p>C++ is platform-dependent as its code is compiled for a specific machine, whereas Java is platform-independent, allowing its bytecode to run on any machine with a Java Virtual Machine.</p> Signup and view all the answers

<p>Java comments include single-line comments starting with <code>//</code>, multi-line comments enclosed by <code>/*...*/</code>, and documentation comments, which also start with <code>/**...*/</code>.</p> Signup and view all the answers

<p>A Java program typically consists of a Documentation Section, Package Declaration, Import Statements, Interface Section, Class Definition, and a Main Method Class.</p> Signup and view all the answers

<p>Comments improve the readability of the code and serve as documentation for others and future reference.</p> Signup and view all the answers

<p>If memory is not properly managed in C++, it could lead to memory leaks, where memory remains allocated but is no longer used.</p> Signup and view all the answers

<p>Java's garbage collection automatically frees memory by handling objects that are no longer in use, reducing the risk of memory leaks.</p> Signup and view all the answers

<p>A developer might prefer C++ over Java for applications that require direct memory management or where performance optimization is critical.</p> Signup and view all the answers