"Java 0 Basic Starter Series" DAY1 development environment Building

First, install the JDK

Java's SDK is referred to as the JDK, to its official website to download the nearest JDK.

Http://www.oracle.com/technetwork/java/javase/downloads/jdk9-downloads-3848520.html

Second, configure environment variables

Java_home Configuring the JDK installation path

PATH to configure the location of the JDK command file

CLASSPATH Configuring the location of a class library file

1. My Computer (right-click)--Properties--Advanced system settings

2. Environment variables--NEW

(1) New variable name "Java_home", Variable Value "C:\Java\jdk1.8.0_144" (that is, the JDK installation path)
(2) Edit, variable name "Path", at the end of the value of the original variable, add ";%java_home%\bin;%java_home%\jre\bin"
(3) New variable name "CLASSPATH", Variable Value ".; %java_home%\lib;%java_home%\lib\dt.jar;%java_home%\lib\tools.jar "

3. Confirm the environment configuration is correct:

In the console, enter the java,javac,java-version command separately, with the compiler information for the JDK as shown below, including information such as modifying the syntax and parameter options for the command.

Java command:

Javac command:

Java-version command:

4. Verify the first Java program under the console:

public class Test {public    static void main (string[] args) {        System.out.println ("Hello world!" );    }}

Write in Notepad, click "Save", and deposit the C packing directory, enter Javac Test.java and Java Test command, you can run the program (print out the result "Hello Java"). Note: Use the cmd command to set the current directory to the Java file directory, for example: CD C:\Users\Administrator\Desktop

At this point, the Java development environment was built successfully.

"Java 0 Basic Starter Series" DAY1 development environment Building