计算机代写|Java代写|The Evolution of Java

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Java是一种广泛使用的计算机编程语言,拥有跨平台、面向对象、泛型编程的特性,广泛应用于企业级Web应用开发和移动应用开发。

statistics-lab™ 为您的留学生涯保驾护航 在代写Java方面已经树立了自己的口碑, 保证靠谱, 高质且原创的统计Statistics代写服务。我们的专家在代写Java代写方面经验极为丰富,各种代写Java相关的作业也就用不着说。

我们提供的Java及其相关学科的代写,服务范围广, 其中包括但不限于:

  • Statistical Inference 统计推断
  • Statistical Computing 统计计算
  • Advanced Probability Theory 高等概率论
  • Advanced Mathematical Statistics 高等数理统计学
  • (Generalized) Linear Models 广义线性模型
  • Statistical Machine Learning 统计机器学习
  • Longitudinal Data Analysis 纵向数据分析
  • Foundations of Data Science 数据科学基础
计算机代写|Java代写|The Evolution of Java

计算机代写|Java代写|The Evolution of Java

Only a few languages have fundamentally reshaped the very essence of programming. In this elite group, one stands out because its impact was both rapid and widespread. This language is, of course, Java. It is not an overstatement to say that the original release of Java $1.0$ in 1995 by Sun Microsystems, Inc., caused a revolution in programming. This revolution radically transformed the Web into a highly interactive environment. In the process, Java set a new standard in computer language design.

Over the years, Java has continued to grow, evolve, and otherwise redefine itself. Unlike many other languages, which are slow to incorporate new features, Java has often been at the forefront of computer language development. One reason for this is the culture of innovation and change that came to surround Java. As a result, Java has gone through several upgradessome relatively small, others more significant.
The first major update to Java was version 1.1. The features added by Java $1.1$ were more substantial than the increase in the minor revision number would have you think. For example, Java $1.1$ added many new library elements, redefined the way events are handled, and reconfigured many features of the original $1.0$ library.

The next major release of Java was Java 2, where the 2 indicates “second generation.” The creation of Java 2 was a watershed event, marking the beginning of Java’s “modern age.” The first release of Java 2 carried the version number 1.2. It may seem odd that the first release of Java 2 used the $1.2$ version number. The reason is that it originally referred to the internal version number of the Java libraries but then was generalized to refer to the entire release itself. With Java 2, Sun repackaged the Java product as J2SE (Java 2 Platform Standard Edition), and the version numbers began to be applied to that product.

The next upgrade of Java was J2SE 1.3. This version of Java was the first major upgrade to the original Java 2 release. For the most part, it added to existing functionality and “tightened up” the development environment. The release of J2SE $1.4$ further enhanced Java. This release contained several important new features, including chained exceptions, channel-based I/O, and the assert keyword.

计算机代写|Java代写|Key Skills & Concepts

n computing, few technologies have had the impact of Java. Its creation in the early days of the Web helped shape the modern form of the Internet, including both the client and server sides. Its innovative features advanced the art and science of programming, setting a new standard in computer language design. The forward-thinking culture that grew up around Java ensured it would remain vibrant and alive, adapting to the often rapid and varied changes in the computing landscape. Simply put: not only is Java one of the world’s most important computer languages, it is a force that revolutionized programming and, in the process, changed the world.
Although Java is a language often associated with Internet programming, it is by no means limited in that regard. Java is a powerful, full-featured, general-purpose programming language. Thus, if you are new to programming, Java is an excellent language to learn. Moreover, to be a professional programmer today implies the ability to program in Java-it is that important. In the course of this book, you will learn the basic skills that will help you master it.
The purpose of this chapter is to introduce you to Java, beginning with its history, its design philosophy, and several of its most important features. By far, the hardest thing about learning a programming language is the fact that no element exists in isolation. Instead, the components of the language work in conjunction with each other. This interrelatedness is especially pronounced in Java. In fact, it is difficult to discuss one aspect of Java without involving others. To help overcome this problem, this chapter provides a brief overview of several Java features, including the general form of a Java program, some basic control structures, and simple operators. It does not go into too many details, but, rather, concentrates on general concepts common to any Java program.

计算机代写|Java代写|The Origins of Java

Java was conceived by James Gosling, Patrick Naughton, Chris Warth, Ed Frank, and Mike Sheridan at Sun Microsystems in 1991 . This language was initially called “Oak” but was renamed “Java” in 1995 . Somewhat surprisingly, the original impetus for Java was not the Internet! Instead, the primary motivation was the need for a platform-independent language that could be used to create software to be embedded in various consumer electronic devices, such as toasters, microwave ovens, and remote controls. As you can probably guess, many different types of CPUs are used as controllers. The trouble was that (at the time) most computer languages were designed to be compiled into machine code that was targeted for a specific type of CPU. For example, consider the $\mathrm{C}++$ language.

Although it was possible to compile a $\mathrm{C}++$ program for just about any type of CPU, to do so required a full $\mathrm{C}++$ compiler targeted for that CPU. The problem, however, is that compilers are expensive and time consuming to create. In an attempt to find a better solution, Gosling and the others worked on a portable, cross-platform language that could produce code that would run on a variety of CPUs under differing environments. This effort ultimately led to the creation of Java.
About the time that the details of Java were being worked out, a second, and ultimately more important, factor emerged that would play a crucial role in the future of Java. This second force was, of course, the World Wide Web. Had the Web not taken shape at about the same time that Java was being implemented, Java might have remained a useful but obscure language for programming consumer electronics. However, with the emergence of the Web, Java was propelled to the forefront of computer language design, because the Web, too, demanded portable programs.
Most programmers learn early in their careers that portable programs are as elusive as they are desirable. While the quest for a way to create efficient, portable (platform-independent) programs is nearly as old as the discipline of programming itself, it had taken a back seat to other, more pressing problems. However, with the advent of the Internet and the Web, the old problem of portability returned with a vengeance. After all, the Internet consisted of a diverse, distributed universe populated with many types of computers, operating systems, and CPUs.
What was once an irritating but low-priority problem had become a high-profile necessity. By 1993 it became obvious to members of the Java design team that the problems of portability frequently encountered when creating code for embedded controllers are also found when attempting to create code for the Internet. This realization caused the focus of Java to switch from consumer electronics to Internet programming. So, although it was the desire for an architecture-neutral programming language that provided the initial spark, it was the Internet that ultimately led to Java’s large-scale success.

计算机代写|Java代写|The Evolution of Java

Java代考

计算机代写|Java代写|The Evolution of Java

只有少数几种语言从根本上重塑了编程的本质。在这个精英群体中,有一个脱颖而出,因为它的影响既迅速又广泛。这种语言当然是 Java。毫不夸张地说,Java 的原始版本1.01995 年由 Sun Microsystems, Inc. 引起了编程革命。这场革命从根本上将 Web 转变为一个高度交互的环境。在此过程中,Java 为计算机语言设计树立了新标准。

多年来,Java 一直在不断发展、发展和重新定义自己。与许多其他语言融入新特性的速度很慢不同,Java 通常处于计算机语言开发的最前沿。原因之一是围绕 Java 的创新和变革文化。因此,Java 经历了几次升级,有些相对较小,有些则比较显着。
Java 的第一个主要更新是 1.1 版。Java添加的功能1.1比您认为的次要修订号的增加要大得多。例如,Java1.1添加了许多新的库元素,重新定义了处理事件的方式,并重新配置了原始库的许多功能1.0图书馆。

Java 的下一个主要版本是 Java 2,其中 2 表示“第二代”。Java 2 的创建是一个分水岭事件,标志着 Java “现代时代”的开始。Java 2 的第一个版本带有版本号 1.2。Java 2 的第一个版本使用1.2版本号。原因是它最初是指 Java 库的内部版本号,但后来被概括为指整个版本本身。在 Java 2 中,Sun 将 Java 产品重新打包为 J2SE(Java 2 平台标准版),并且版本号开始应用于该产品。

Java 的下一个升级是 J2SE 1.3。此版本的 Java 是对原始 Java 2 版本的第一次重大升级。在大多数情况下,它增加了现有功能并“收紧”了开发环境。J2SE的发布1.4进一步增强了Java。此版本包含几个重要的新特性,包括链式异常、基于通道的 I/O 和 assert 关键字。

计算机代写|Java代写|Key Skills & Concepts

在计算方面,很少有技术对 Java 产生过影响。它在 Web 早期的创建帮助塑造了 Internet 的现代形式,包括客户端和服务器端。它的创新功能提升了编程的艺术和科学,为计算机语言设计树立了新标准。围绕 Java 发展起来的具有前瞻性的文化确保了它能够保持活力和活力,以适应计算领域中经常快速而多变的变化。简而言之:Java 不仅是世界上最重要的计算机语言之一,它还是一股彻底改变了编程并在此过程中改变了世界的力量。
尽管 Java 是一种经常与 Internet 编程相关联的语言,但它在这方面绝不是受限的。Java 是一种功能强大、功能齐全的通用编程语言。因此,如果您是编程新手,Java 是一门极好的学​​习语言。此外,今天成为一名专业程序员意味着能够使用 Java 进行编程——这很重要。在本书的课程中,您将学习有助于掌握它的基本技能。
本章的目的是向您介绍 Java,从它的历史、它的设计理念以及它的几个最重要的特性开始。到目前为止,学习编程语言最困难的事情是没有元素是孤立存在的。相反,语言的组成部分相互配合。这种相互关联性在 Java 中尤为明显。事实上,很难在不涉及其他方面的情况下讨论 Java 的一个方面。为了帮助克服这个问题,本章提供了几个 Java 特性的简要概述,包括 Java 程序的一般形式、一些基本的控制结构和简单的运算符。它没有涉及太多细节,而是专注于任何 Java 程序共有的一般概念。

计算机代写|Java代写|The Origins of Java

Java 由 Sun Microsystems 的 James Gosling、Patrick Naughton、Chris Warth、Ed Frank 和 Mike Sheridan 于 1991 年构思。这种语言最初被称为“Oak”,但在 1995 年更名为“Java”。有点令人惊讶的是,Java 最初的动力并不是互联网!相反,主要动机是需要一种独立于平台的语言,该语言可用于创建嵌入各种消费电子设备(如烤面包机、微波炉和遥控器)的软件。您可能会猜到,许多不同类型的 CPU 都用作控制器。问题在于(当时)大多数计算机语言都被设计为编译成针对特定类型 CPU 的机器代码。例如,考虑C++语。

虽然可以编译一个C++几乎适用于任何类型 CPU 的程序,为此需要完整的C++针对该 CPU 的编译器。然而,问题在于编译器的创建既昂贵又耗时。为了找到更好的解决方案,Gosling 和其他人研究了一种可移植的跨平台语言,该语言可以生成可在不同环境下的各种 CPU 上运行的代码。这种努力最终导致了 Java 的诞生。
大约在制定 Java 细节的时候,出现了第二个,也是最终更重要的因素,它将在 Java 的未来发挥关键作用。这第二种力量当然是万维网。如果 Web 没有在 Java 实现的同时形成,Java 可能仍然是一种有用但晦涩的消费电子编程语言。然而,随着 Web 的出现,Java 被推到了计算机语言设计的前沿,因为 Web 也需要可移植的程序。
大多数程序员在他们职业生涯的早期就知道可移植程序是难以捉摸的,因为它们是可取的。虽然寻求一种创建高效、可移植(独立于平台)程序的方法几乎与编程本身的学科一样古老,但它已经让位给了其他更紧迫的问题。然而,随着 Internet 和 Web 的出现,旧的可移植性问题又卷土重来。毕竟,Internet 由一个多样化的分布式宇宙组成,其中包含多种类型的计算机、操作系统和 CPU。
曾经令人恼火但优先级较低的问题已成为备受瞩目的必需品。到 1993 年,Java 设计团队的成员发现,在为嵌入式控制器创建代码时经常遇到的可移植性问题在尝试为 Internet 创建代码时也很明显。这种认识导致 Java 的关注点从消费电子转向 Internet 编程。因此,尽管最初产生火花的是对一种架构中立的编程语言的渴望,但最终导致 Java 大规模成功的是互联网。

计算机代写|Java代写 请认准statistics-lab™

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金融工程代写

金融工程是使用数学技术来解决金融问题。金融工程使用计算机科学、统计学、经济学和应用数学领域的工具和知识来解决当前的金融问题,以及设计新的和创新的金融产品。

非参数统计代写

非参数统计指的是一种统计方法,其中不假设数据来自于由少数参数决定的规定模型;这种模型的例子包括正态分布模型和线性回归模型。

广义线性模型代考

广义线性模型(GLM)归属统计学领域,是一种应用灵活的线性回归模型。该模型允许因变量的偏差分布有除了正态分布之外的其它分布。

术语 广义线性模型(GLM)通常是指给定连续和/或分类预测因素的连续响应变量的常规线性回归模型。它包括多元线性回归,以及方差分析和方差分析(仅含固定效应)。

有限元方法代写

有限元方法(FEM)是一种流行的方法,用于数值解决工程和数学建模中出现的微分方程。典型的问题领域包括结构分析、传热、流体流动、质量运输和电磁势等传统领域。

有限元是一种通用的数值方法,用于解决两个或三个空间变量的偏微分方程(即一些边界值问题)。为了解决一个问题,有限元将一个大系统细分为更小、更简单的部分,称为有限元。这是通过在空间维度上的特定空间离散化来实现的,它是通过构建对象的网格来实现的:用于求解的数值域,它有有限数量的点。边界值问题的有限元方法表述最终导致一个代数方程组。该方法在域上对未知函数进行逼近。[1] 然后将模拟这些有限元的简单方程组合成一个更大的方程系统,以模拟整个问题。然后,有限元通过变化微积分使相关的误差函数最小化来逼近一个解决方案。

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随机分析代写


随机微积分是数学的一个分支,对随机过程进行操作。它允许为随机过程的积分定义一个关于随机过程的一致的积分理论。这个领域是由日本数学家伊藤清在第二次世界大战期间创建并开始的。

时间序列分析代写

随机过程,是依赖于参数的一组随机变量的全体,参数通常是时间。 随机变量是随机现象的数量表现,其时间序列是一组按照时间发生先后顺序进行排列的数据点序列。通常一组时间序列的时间间隔为一恒定值(如1秒,5分钟,12小时,7天,1年),因此时间序列可以作为离散时间数据进行分析处理。研究时间序列数据的意义在于现实中,往往需要研究某个事物其随时间发展变化的规律。这就需要通过研究该事物过去发展的历史记录,以得到其自身发展的规律。

回归分析代写

多元回归分析渐进(Multiple Regression Analysis Asymptotics)属于计量经济学领域,主要是一种数学上的统计分析方法,可以分析复杂情况下各影响因素的数学关系,在自然科学、社会和经济学等多个领域内应用广泛。

MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中,其中问题和解决方案以熟悉的数学符号表示。典型用途包括:数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发,包括图形用户界面构建MATLAB 是一个交互式系统,其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题,尤其是那些具有矩阵和向量公式的问题,而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问,这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展,得到了许多用户的投入。在大学环境中,它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域,MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要,工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数(M 文件)的综合集合,可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。

R语言代写问卷设计与分析代写
PYTHON代写回归分析与线性模型代写
MATLAB代写方差分析与试验设计代写
STATA代写机器学习/统计学习代写
SPSS代写计量经济学代写
EVIEWS代写时间序列分析代写
EXCEL代写深度学习代写
SQL代写各种数据建模与可视化代写

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