Java installation tutorial: detailed steps from download to configuration, specific code examples are required
Java is a cross-platform programming language that is widely used in the development of various types of applications. Before you start learning and using Java, you first need to install the Java development environment on your computer. This article will provide a detailed Java installation tutorial, all steps from download to configuration, and provide specific code examples.
Step 1: Download Java JDK
First, we need to download the Java Development Kit (JDK). JDK is a software package that contains a Java compiler, runtime environment, and other development tools. Through JDK, we can compile and run Java code.
We can download JDK through Oracle’s official website. On the download page of the website, select the version for your operating system and click the Download button. Once the download is complete, double-click the installer and follow the prompts to complete the installation.
Step 2: Configure environment variables
After the installation is complete, we need to configure the computer's environment variables so that we can use Java commands anywhere.
Step 3: Verify Java installation
After completing the configuration of environment variables, we can verify whether Java has been successfully installed. Open a command prompt (or terminal) window and enter the following command:
java -version
If you see that the version information of Java can be output, Java has been successfully installed.
Step 4: Write, compile and run Java programs
Now, we have successfully installed Java and configured the development environment. Next, we can write, compile, and run our first Java program.
public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } }
javac HelloWorld.java
If the compilation is successful, a file with the suffix .class will be generated in the current directory. document.
java HelloWorld
If everything is OK, you will be in the command prompt (or You can see the output "Hello, World!" in the terminal window.
Through the above steps, we have successfully installed Java and successfully written, compiled and run a simple Java program. Now, you can start learning other knowledge and technologies about Java and explore this powerful and flexible programming language in depth. I wish you success in learning and using Java!
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