Whenever I learn a new language I start with a Mandelbrot. Just to get the hang of loops, variables and drawing.
Many other simple learning progs are possible. For basic screen/key/mouse i/o and timers, try a Tetris, Breakout, or Clock/alarm clock. To learn audio interface make an Electric piano/synth. To learn maths/recursion/string manipulation i often write a quick expression parser + graphing prog. To learn sockets, you could try a simple p2p chat.
dont rush urself, get a good java book and study from the chapter 1st and make sure you solve all the exercises of each chapter. First get ur basic / foundation strong, then u can think about how to apply that knowledge in project. And make sure u also get a good book about algorithm. If you had an experiences in php for 4 years, you must developed something with php i can assume, so try to develop same application with Java now, it will give you good insight about Java. And one thing... try to focus on how you can write good quality code! Anybody can write code but good quality code is rare, focus there.
一般来说，我会说找到一个您感兴趣的网络应用程序。如果您熟悉 PHP，那么您可能也熟悉许多 Web 技术。服务器上的 Java 是 PHP 的一个很好的替代方案，并且部署 Java Web 应用程序非常简单。
while general, I would say find a web application that interests you. If you are familiar with PHP, you are probably familiar with many web technologies. Java on the server is a nice alternative to PHP, and deploying a Java web application is pretty simple.
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每当我学习一门新语言时，我都会从曼德尔布罗开始。只是为了掌握循环、变量和绘图的窍门。
许多其他简单的学习程序也是可能的。对于基本的屏幕/键/鼠标 I/O 和计时器，请尝试俄罗斯方块、Breakout 或时钟/闹钟。学习音频接口制作电钢琴/合成器。为了学习数学/递归/字符串操作，我经常编写一个快速表达式解析器+图形程序。要学习套接字，您可以尝试简单的 p2p 聊天。
Java是一个不错的选择，祝你好运！
Whenever I learn a new language I start with a Mandelbrot. Just to get the hang of loops, variables and drawing.
Many other simple learning progs are possible. For basic screen/key/mouse i/o and timers, try a Tetris, Breakout, or Clock/alarm clock. To learn audio interface make an Electric piano/synth. To learn maths/recursion/string manipulation i often write a quick expression parser + graphing prog. To learn sockets, you could try a simple p2p chat.
Java is a good choice, good luck!
我的建议是，参加一些大学开设的基于项目的课程。超过 COMP 101 的东西，但理论不算太重。
这就是我的大学如何打压二年级生的方式。它很有趣，并且需要您考虑设计和（一点）数据结构。良好的“地球之盐”编程：控制台、文件 IO、解析、集合等。没有 GUI，尽管有 另一个项目和线程。
My advice, take a project based course some university puts up. Something past COMP 101, but not too theory heavy.
This one's how my university breaks sophomores. Its fun, and requires you to think about design and (a little) about data structures. Good "salt of the earth" programming: consoles, file IO, parsing, collections, etc. No GUI, though there's another project for that and threading.
不要着急，找一本好的java书，从第一章开始学习，并确保解决每一章的所有练习。首先让你的基础打牢，然后你可以考虑如何在项目中应用这些知识。并确保你还得到一本关于算法的好书。如果你有 4 年的 php 经验，我可以假设你必须用 php 开发一些东西，所以现在尝试用 Java 开发相同的应用程序，它会让你对 Java 有很好的了解。还有一件事......尝试专注于如何编写高质量的代码！任何人都可以编写代码，但高质量的代码很少见，请重点关注。
dont rush urself, get a good java book and study from the chapter 1st and make sure you solve all the exercises of each chapter. First get ur basic / foundation strong, then u can think about how to apply that knowledge in project. And make sure u also get a good book about algorithm. If you had an experiences in php for 4 years, you must developed something with php i can assume, so try to develop same application with Java now, it will give you good insight about Java. And one thing... try to focus on how you can write good quality code! Anybody can write code but good quality code is rare, focus there.
一般来说，我会说找到一个您感兴趣的网络应用程序。如果您熟悉 PHP，那么您可能也熟悉许多 Web 技术。服务器上的 Java 是 PHP 的一个很好的替代方案，并且部署 Java Web 应用程序非常简单。
while general, I would say find a web application that interests you. If you are familiar with PHP, you are probably familiar with many web technologies. Java on the server is a nice alternative to PHP, and deploying a Java web application is pretty simple.