Tribute Bi Xiangdong Java Video

Freshman:

Before turning to professional in the NetEase cloud Open class to see MIT's line generation revenue is quite a lot,

Sophomore last semester:

NetEase Cloud on the AFA of C, repeatedly looked at five or six times, feel not difficult and always feel less what, later looked good bin (excellent specialist teacher) enlightened, saw two times. Good bin data structure is also good, because no such training institutions

Behind in the group of good Friends Bin Bin (specialist teacher, life first master) there got Baoming (Preach Wisdom podcast C) video, unsanitary environment. Look at both sides, the pointer behind the hasty end, but this time half a year has gone.

Sophomore Next semester:

Start the week before the beginning with the Java environment, a deep understanding of what time to do what, the world video a big copy, but good or bad, from the C time Allocation failure experience first selected the Preach Wisdom Podcast, salute Bi Xiangdong, repeated read four or five times

An operating system in Peking University is good, but a bit dull, the style of training institutions may be more suitable for newcomers and network video

Juniors last semester:

Turn JSP after style does not like, total feeling and C as pure programming difference is too big. In the group to meet the NG Ian (and gold medal together is the second master), get Elina Web video, put it down, perhaps the Northeast dialect sounds good. Repeated several times

Next semester:

Servlet things a bit more, also their own time distribution problems, skipped some into the framework, in the group to meet the Fuzhou Seniors (third master), combined with network video, the beginning of knowledge Struct2 spring hibernate.

Senior:

Proud to have found a job on July 8 before the end of the junior years, and although it is now almost 0 basic, it was even worse at the time, thanks to the first company and Hu Xiaoliang (fourth master), who, behind this group of like-minded people, knew that their previous non-gregarious was right. All the colleagues you know are counted as the last master.

In the blink of an eye half a year elapsed, self-think and school as not work hard, good, this atmosphere often overtime or harvest a lot.

Today bored on YouTube watched a few episodes Bi Xiangdong video, want to write some notes, really not fit, or bite the Java programming idea, did not expect to write in passing the university time. Thank you, Lee, in silence.

Chapter One: Computer language overview

Software: A collection of computer data and instructions that follow a specific organization

Main sub-system software and application software

Software is better for people and computers to interact

Interactive mode: graphical, command line

Getting up early only command line, such as dos

Language Chinese and Americans communicate to learn English

Let the computer do things to learn computer language

Internet-oriented object-oriented language introduced in 95

Java is currently the most demanding

Three Technologies for Java

Java EE Enterprise. Javase Desktop. Javame embedded

Operating system is now mostly Mac Windows android iOS

Our job is to develop application software on these mainstream systems.

Oracl now acquires Sun , it is easier to seamlessly connect Java and Oracl in the future

Chapter Two:the cross-platform principle of the Java language JVM

Cross-platform

Less software development work, such as now WebApp

Language platform, virtual machine is not cross-platform. The virtual machine is responsible for running Java on the operating system

Windows built-in C + + virtual machines (language interpreter)

One compilation, running anywhere. Developing virtual machines is more difficult than Java

Recommended "in-depth understanding of the JVM principle"

Chapter III: Java language Jdk&jre

Run environment Jre= class library +JVM

JDK =jre+ Compilation tool (Javac.exe) + Packaging tool (Jar.exe)

Developers need JDK, installing Java- developed applications such as Elcipse requires JRE

Fourth chapter:java language jdk Download and installation

Download website

Google browser comes with translation to see the number of requirements and version high and low fool (next) installation

The JDK contains the JRE, but sometimes Elispe will find a separate JRE path installed by default.

Fifth: command-line tools in the Java language JDK

JDK/bin directory

Javac.exe Double-click when a flash, there is no graphical interface to prove that it is the command line execution program, under the doc Use this tool

Cd Directory Enter this directory

Chapter Sixth: Introduction to theJava language command line

Graphical interface is the command line package and mouse operation, all the graphical operation of the command line can almost

Dir Look at the file under the directory, define the time is to expand the English abbreviation of the directory

Cd jdk* * match, default is match first, general copy under Path, right-click Paste

C: Toggle Drive letter

Md Create directory equals right-click New Folder

Tribute Bi Xiangdong Java Video