A more detailed graphic tutorial for learning Java Xiaobai in 2023 . More personal records.
Step 1: Install JDK
http://www.oracle.com/technetwork/java/javase/downloads/index.html
Open the website, the default is the download package of the Linux system, select the appropriate version according to the respective system requirements (Linux/mac/win), this tutorial takes the mainstream win10 64-bit as an example:
Select the x64 Installer . (exe ending) file to download and open:
Choose a good path during installation ( be sure to remember the path !!! It will affect the configuration efficiency of subsequent environment variables )
Step 2: Configure environment variables
After the installation is complete, right-click My Computer--Properties--Advanced System Settings--Environment Variables ;
Set variable parameters
In " System Variables " , you need to set 2 properties (the older version says 3 items: JAVA_HOME PATH CLASSPATH )
However, CLASSPATH is not required to be configured . Versions after jdk6 do not need to be reconfigured and are not recommended . Java can still be used normally and can be practiced by yourself.
Variable name 1 : JAVA_HOME
The selected document path contains the above.
Variable value: C:\Program Files (x86)\Java\... (If it is the default path, it is likely to be in the location of the C drive) // Configure according to your actual path (remember the importance of the path! Don’t make a mistake !)
Variable name 2 : CLASSPATH (old version needs to be configured, can be ignored)
variable:
.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar
(can be copied directly)
Variable name 3 : PATH ( PATH not in the system variable needs to be created manually )
variable:
%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;
(can be copied directly)
Note: In Windows 10 , the Path variable is displayed in sections. We need to add %JAVA_HOME%\bin %JAVA_HOME%\ jre \bin separately, otherwise it will not be recognized:
Step Three: Test
Press win+R on the keyboard to invoke the command character, enter cmd and press Enter;
Enter javac and press Enter,
And java , java -version ( note that there is a space after java in java -version )
The above pop-up indicates that the JDK environment configuration is complete . (you can exit here)
If popup' is not recognized as an internal or external command, operable program
or batch file. ' means that the installation of the environment failed, and it is necessary to recheck the steps or the configuration of the environment variables for errors.
Next: Open source, Java-based extensible development platform Eclipse installation tutorial [Java] Development environment configuration: JDK configuration and Eclipse installation (2)_This blog I don't know-CSDN blog