First day of Java--configuration and crack of environment variables myeclipse2013

I. Configuration of the JDK environment variables

1, download the JDK and install (the official website javase,64 bit (depends on how many bits of computer))
Official website http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

2. Click Jdk-8u91-windows-x64.exe to install after the download is complete.
After successful installation, you can see it in the installation location (e.g. C:\Program Files\java) with JDK and jar

3. JDK environment variable Configuration
First step: Right click on the computer (or My Computer), select Properties, click "Advanced System Settings"
Step Two: Select "Advanced"-"Environment variable" (temp is user variable, TMP is System variable) in System Properties
Step three: Select "System Variables"--Find "path" in the system variable, click "Edit"
Fourth step: Find the path to install Java inside the JDK, copy its path: C:\Program files\java\jdk1.8.0_91\bin, and then paste the path to the location of path (both front and back), it is important to follow the other path to ";" Semicolon separated
Fifth step: Determine whether the installation is successful, not installed before the CMD console input Java is no information, after successful installation, the input Java will display as

Attention:
If the installation is successful, the following information is displayed:

C:\users\administrator>java-version
Java Version "1.8.0_91"
Java (TM) SE Runtime Environment (build 1.8.0_91-b15)
Java HotSpot (TM) 64-bit Server VM (build 25.91-b15, Mixed mode)

C:\users\administrator>javac-version
Javac 1.8.0_91

Second, console cmd some simple commands

1. Switch between directories command: Directory name + ":", then enter (such as: D:)
2. Commands for viewing content in this directory: Dir
3. Enter a directory command: CD directory name (for example: CD D:\JAVA\JAVA1)
4, Command completion: Enter some folder name, and then press "tab" key to complete
5. View commands that have been entered in the console: press the keyboard up/down ARROW key
6. cd. Return to previous level directory

Third, crack myeclipse2013

Can only be used for 30 days before it is cracked

After cracking:

The steps are as follows:

1, in the download good Activation patch directory, double-click Run, pop up the following interface

2, enter your registered users in the Usercode column, click the Generate SystemID button, such as

3. Then click on the action button such as:

The following steps if you cannot find the path proof to set the hidden folder: Open a folder--organization--folders and search options--check Show hidden files, folders, and drives so that you can find the appropriate path

That's how we cracked the myeclipse2013.

Iv. Knowledge points learned today

Knowledge Points:
1. The Java language is a free-form language
2. The Java language is composed of two statements: Structure definition statement and Function execution statement
Structure Definition statement:
A statement enclosed in curly braces
Function Execution Statement:
Statements that implement specific functions

3. Change myeclipse font size and color
Window-->preferences--> search font--> Click Colors and Fonts-->java-java Editor Text Font

4, MyEclipse fast Input Method:
System.out.println ();
Enter syso and press "ALT" + "/" to show the whole sentence.

First day of Java--configuration and crack of environment variables myeclipse2013