Java Learning Path (environment configuration,)

Recently the past winter vacation I began to read some Java learning video, the video is Bi Xiangdong teacher, speak well, the Northeast accent, Europe did not?

First, there are some basic concepts.

1. Three technical architectures of Java

• Enterprise Edition Java EE
• Standard Edition J2SE
• Mini version J2ME

2. Features of the Java language: cross-platform

In short, different platforms have a corresponding JVM. That is, the Windows system has a win version of the Jvm,linux system has a Linux version of the JVM,MAC system has a Mac version of the JVM, and Java programs are developed on these virtual machines.

3, the Java language environment construction

Since the Sun company was acquired by Oracle, download the JDK on the Oracle website (www.oracle.com), it is best not to go to a small website to download, I ate a loss, has been the advertising software loaded into my computer, finally unplug the cable one by one uninstall, Avira.

Main steps: Download jdk-install jdk-Configure environment variables-Verify success

Download installation is a trivial matter, mainly to configure environment variables

The so-called configuration environment variable is to tell the Windows system where Java is located, right-click My Computer-Properties-advanced-environment variables-Modify path (add Java path)

Verify: Turn on DOS, enter JAVAC for verification

4, here need the computer DOS interface to help, and DOS-related command line operation as follows:

Dir: Lists the files and folders in the current directory

MD: Creating a Directory

RD: Deleting a directory

CD: Enter the specified directory

CD: Back to top level directory

Cd\: Go back to the root directory

Del: Delete Files

Exit: Exit DOS command line

Help CD can use this when not remembering commands

Java Learning Path (environment configuration,)