Java Installation Guide: Learn Quickly from the Basics

Start from scratch: Java installation tutorial to help you get started quickly, specific code examples are required

Introduction:
In the field of computer science, Java is a widely The programming language used. It is easy to learn, reliable and stable, and cross-platform, so it is very popular among developers. This article aims to provide beginners with a concise and easy-to-understand Java installation tutorial to help you get started quickly and start writing your own Java programs. The article will cover the installation steps for Windows, Mac and Linux operating systems, and provide some specific code examples.

1. Java installation steps under Windows operating system:

1. First, visit the Java download page of Oracle’s official website (https://www.oracle.com/java/technologies /javase-jdk11-downloads.html).
2. Select the Java Development Kit (JDK) for Windows download on the page. Select the appropriate version based on your operating system's bitrate and click the download button.
3. After the download is completed, find the downloaded installer and double-click to open it.
4. Follow the guidance of the installation wizard and select the installation path and other options. It is recommended to select the default settings and make sure the "Set environment variable (PATH)" option is checked.
5. Click "Next" and wait for the installation to complete.

2. Java installation steps under Mac operating system:

1. First, visit the Java download page of Oracle’s official website in the browser (https://www. oracle.com/java/technologies/javase-jdk11-downloads.html).
2. Find the Java Development Kit (JDK) download link for the MacOS system and click the download button.
3. After the download is completed, find the downloaded installer and double-click to open it.
4. Follow the installation wizard to install and select the installation path and other options. Again, it is recommended to select the default settings and make sure the "Set environment variable (PATH)" option is checked.
5. Click "Next" and wait for the installation to complete.

3. Java installation steps under Linux operating system:

1. First, enter the following command in the terminal to update the system:

   sudo apt update

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2. Then enter the following command to install the Java Development Kit (JDK):

   sudo apt install default-jdk

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3. During the installation process, the system will prompt you to confirm whether to continue. Type "Y" and press Enter.

4. After the installation is complete, you can use the following command to verify whether Java is installed successfully:

   java -version

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   If the Java version information is displayed, the installation is successful.

4. Java code example:
The following is a simple Java program example for printing "Hello, World!":

public class HelloWorld {
   public static void main(String[] args) {
      System.out.println("Hello, World!");
   }
}

Please note that, The above code examples must be properly installed and configured before running. Make sure the Java Development Kit (JDK) is properly installed before writing and running Java code.

Conclusion:
This article provides a simple and easy-to-understand Java installation tutorial for beginners, and provides some specific code examples. Whether you are using a Windows, Mac or Linux operating system, you can follow the steps in this tutorial to install it and start writing your first Java program. Hopefully this tutorial will help you get started quickly and make progress!

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