Installation and configuration guide for Java and JDK under Debian system

php editor Apple brings you a concise and clear installation and configuration guide for Java and JDK under Debian system. As a popular programming language, Java plays an important role in development. This guide will help you easily install and configure Java and its Development Kit (JDK), allowing you to quickly start programming in Java. Whether you are a beginner or an experienced developer, you will get useful information and steps in this guide to successfully use Java on Debian systems. Let’s explore together!

Install Java

1. Open the terminal: You can open the terminal by pressing the Ctrl Alt T key combination.

2. Update the package list: Enter the following command in the terminal and press Enter to execute:

```sql

sudo apt-get update

```

3. Install Java Runtime Environment (JRE): Enter the following command in the terminal and press Enter to execute:

```arduino

sudo apt-get install default-jre

4. Verify Java installation: Enter the following command in the terminal and press Enter to execute:

java -version

If the installation is successful, you will see the version information of Java.

Install JDK

1. Enter the following command in the terminal and press Enter to install JDK:

sudo apt-get install default-jdk

2. Verify JDK installation: Enter the following command in the terminal and press Enter to execute:

javac -version

If the installation is successful, you will see the version information of javac.

Configure Java environment variables (optional)

If you need to switch between multiple Java versions, or want to simplify the use of Java commands, you can configure Java environment variables, edit ` ~/.bashrc` file and add the following lines at the end of the file:

```ruby

export JAVA_HOME=/usr/lib/jvm/java-x.x.x-openjdk-amd64 # will Replace x.x.x with your Java version

export PATH=$PATH:$JAVA_HOME/bin

After saving the file, run the following command to make the changes take effect:

```bash

source ~/.bashrc

Notes

1. Before installing Java and JDK, please make sure that your Debian system has been updated to the latest version.

2. If you do not need to develop Java applications, just install JRE.

3. When configuring Java environment variables, make sure to replace `java-x.x.x-openjdk-amd64` with the Java version you actually installed.

Share for you: In Linux systems, you can use the `man` command to view the man page of the command. For example, `man java` will display the man page of the Java command, which contains detailed options and usage instructions. .

I hope this article can help you successfully install Java and JDK in Debian system. If you have any questions, please feel free to leave a message in the comment area.

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