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JAVA Environment Configuration

Speaking of Java environments, first we need to know what environment variables are

An environment variable is an object with a specific name in the operating system that contains information that will be used by one or more applications. For example, the path environment variable in Windows and DOS operating systems, when the system is asked to run a program without telling it the full path of the program, the system should not only look for the program in the current directory, but also look for the path specified in the path. Users can set environment variables to better run the process.

Configure the environment variables in the process of we need to use the JDK, JDK download address for www.oracle.com/technetwork…

Open the environment variables screen and click New below

JAVA_HOME variable Create a JAVA_HOME variable

Click Browse Directory, variable value is JDK installation directory, and then click OK.

The Path variable

Find the path variable in the system variable, select it, and click Edit

To make sure the JRE doesn’t cause problems when you use javaIDE, create a new variable

Note again: all characters must be in The English state.

Click OK, and then OK. Open the path variable to verify that the variable has been saved successfully.

The ClassPath variable

The input. %JAVA_HOME%\lib\dt.jar; %JAVA_HOME%\lib\tools.jar;

Click OK, close and re-open to verify that the installation was successful.

Validation of the Java runtime environment

Press the Windows + R key on the keyboard to open the run prompt box, enter CMD (short for “command”)

Type Java to verify that the Java installation is successful.

Input javac

Verified!

Eclipse develops JavaWeb projects to configure Tomcat

First we need to know what is Tomcat

Tomcat is an open source project of Apache. Tomcat server is a free and open source Web application server, which is a lightweight application server. It is widely used in small and medium-sized systems and not many concurrent users, and is the first choice for developing and debugging JSP programs. For starters, you can assume that when the Apache server is configured on a machine, you can use it to respond to requests for HTML (an application in standard Common Markup Language) pages. Tomcat is actually an extension of the Apache server, but at runtime it runs on its own, so when you run Tomcat, it actually runs as a separate process from Apache.

The tomcat download address is tomcat.apache.org

The eclipse download address to www.eclipse.org/downloads/

Open it when the download is complete