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JAVA introductory system tutorial (1) Configuring JAVA development environment

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Release: 2018-08-10 10:02:41
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Configuring the JAVA development environment

1. Download and install the JDKDownload the JDK through the www.oracle.com

website ( Java develop kit) JAVA development kit

JAVA introductory system tutorial (1) Configuring JAVA development environment

Install the downloaded jdk in a fool-proof way

Note: The installation path cannot contain Chinese characters

2. Configure environment variables

Right-click My Computer--> Properties --> Advanced system settings--> Environment variables

JAVA introductory system tutorial (1) Configuring JAVA development environment

##Click New under System Variables--> Set the variable name: JAVA_HOME --> The variable value is the path where the JDK is installed --> Confirm

JAVA introductory system tutorial (1) Configuring JAVA development environment

## in Find Path under System Variables and double-click --> Click New under win10 (enter directly at the front under win7) %JAVA_HOME%\bin --> Confirm

JAVA introductory system tutorial (1) Configuring JAVA development environment

3. Verify whether the configuration is successful

Click on the keyboard win R --> Enter cmd --> Enter java -version

JAVA introductory system tutorial (1) Configuring JAVA development environment

##This means that we have successfully matched it. Next, let’s complete the first program "Hello" World”

1) Create a new text under the path

2) Enter the main program of HelloWorld

class helloworld{ public static void main(String[] args){
System.out.println("hello world");
}
}

After saving, change the extension to .java

4) Enter a certain disk in cmd: Set the path to the disk --> cd The file we just entered Path

JAVA introductory system tutorial (1) Configuring JAVA development environment

5) Use javac to compile the program into a class file

JAVA introductory system tutorial (1) Configuring JAVA development environment

After compilation, a file with a .class extension will appear

6) Execute the first program hello world

Enter java helloworld

JAVA introductory system tutorial (1) Configuring JAVA development environment

##Execution completed~

But we cannot execute code in this way every time we develop, so we must have a compiler

The compiler used in our development process is: eclipse


With this software we can start our java development journey

We will explain it first next time How to use eclipse

#END

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