search
HomeOperation and MaintenanceDockerDoes docker need to install jdk?

The docker service itself does not need to install jdk. If the java application container is used, jdk needs to be installed in the container; the docker container does not have jdk by default. If you need to run the java program, install jdk in the host machine and install it in the container. jdk, the full name of jdk is "Java Development Kit", which refers to the software development tool kit of Java language. It is mainly used for the development of java applications on mobile devices and embedded devices.

Does docker need to install jdk?

The operating environment of this tutorial: linux7.3 system, docker version 19.03, Dell G3 computer.

Docker needs to install jdk

The docker service itself does not require it.

jdk is required for java applications, and docker is written in go. If your java application container is behind, you need to install jdk in the container.

Docker containers do not have JDK by default. If you need to run a Java program, you must either install JDK in the host machine or install JDK in the container. The following is how to install JDK in the container

What is jdk

jdk (full name is Java Development Kit) is a product of SunMicrosystems for Java developers. It is a software development tool kit for the Java language, mainly used for mobile devices, embedded java application on the device.

JDK is the core of the entire JAVA, including Java Runtime Envirnment, a bunch of Java tools (javac/java/jdb, etc.) and Java basic class libraries (i.e. Java API including rt.jar ).

The most mainstream JDK is the JDK released by Sun. In addition to Sun, there are many companies and organizations that have developed their own JDK. IBM has developed its own JDK, and domestic Taobao has also developed its own JDK. Each organization develops its own JDK in order to improve certain aspects to meet its own needs.

JDK is a development environment for building applications, applets, and components published on the Java platform. It does not provide specific development software. What it provides is the class library and Java language specification that must be used no matter what kind of development software you use to write Java programs.

Docker needs to install jdk separately?

The docker container does not have JDK by default. If you need to run a Java program, you must either install JDK in the host machine or install JDK in the container. Here's how to install JDK in a container.

1. Download the gz file of the required jdk version in the host system

         http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

2. Copy the gz file to the root user directory in the container

docker cp <path to jdk gz file>/jdk-8u121-linux-x64.tar.gz <容器名称或者ID>:/root

3. Enter the container

docker exec -it <容器名称或者ID> bash

4. Unzip the gz file in the container

cd ~
tar -zxvf jdk-8u121-linux-x64.tar.gz
chown root:root ~/jdk1.8.0_121 -R

5. Create the JAVA_HOME directory of the container system

mkdir /usr/lib/jvm

6. Move the jdk directory to the JAVA_HOME directory

mv ~/jdk1.8.0_121 /usr/lib/jvm

7. Install vim

yum update
yum -y install vim*

8. Set environment variables

vim ~/.bashrc
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_121 ## 这里要注意目录要换成自己解压的jdk 目录
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

9. Make environment variables take effect immediately

source ~/.bashrc

10. Verify JDK version

java -version

Recommended learning: "docker video tutorial"

The above is the detailed content of Does docker need to install jdk?. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Docker vs. Kubernetes: Use Cases and ScenariosDocker vs. Kubernetes: Use Cases and ScenariosApr 23, 2025 am 12:11 AM

Select Docker in a small project or development environment, and Kubernetes in a large project or production environment. 1.Docker is suitable for rapid iteration and testing, 2. Kubernetes provides powerful container orchestration capabilities, suitable for managing and expanding large applications.

Docker on Linux: Containerization for Linux SystemsDocker on Linux: Containerization for Linux SystemsApr 22, 2025 am 12:03 AM

Docker is important on Linux because Linux is its native platform that provides rich tools and community support. 1. Install Docker: Use sudoapt-getupdate and sudoapt-getinstalldocker-cedocker-ce-clicotainerd.io. 2. Create and manage containers: Use dockerrun commands, such as dockerrun-d--namemynginx-p80:80nginx. 3. Write Dockerfile: Optimize the image size and use multi-stage construction. 4. Optimization and debugging: Use dockerlogs and dockerex

Docker: The Containerization Tool, Kubernetes: The OrchestratorDocker: The Containerization Tool, Kubernetes: The OrchestratorApr 21, 2025 am 12:01 AM

Docker is a containerization tool, and Kubernetes is a container orchestration tool. 1. Docker packages applications and their dependencies into containers that can run in any Docker-enabled environment. 2. Kubernetes manages these containers, implementing automated deployment, scaling and management, and making applications run efficiently.

Docker's Purpose: Simplifying Application DeploymentDocker's Purpose: Simplifying Application DeploymentApr 20, 2025 am 12:09 AM

The purpose of Docker is to simplify application deployment and ensure that applications run consistently in different environments through containerization technology. 1) Docker solves the environmental differences problem by packaging applications and dependencies into containers. 2) Create images using Dockerfile to ensure that the application runs consistently anywhere. 3) Docker's working principle is based on images and containers, and uses the namespace and control groups of the Linux kernel to achieve isolation and resource management. 4) The basic usage includes pulling and running images from DockerHub, and the advanced usage involves managing multi-container applications using DockerCompose. 5) Common errors such as image building failure and container failure to start, you can debug through logs and network configuration. 6) Performance optimization construction

Linux and Docker: Docker on Different Linux DistributionsLinux and Docker: Docker on Different Linux DistributionsApr 19, 2025 am 12:10 AM

The methods of installing and using Docker on Ubuntu, CentOS, and Debian are different. 1) Ubuntu: Use the apt package manager, the command is sudoapt-getupdate&&sudoapt-getinstalldocker.io. 2) CentOS: Use the yum package manager and you need to add the Docker repository. The command is sudoyumininstall-yyum-utils&&sudoyum-config-manager--add-repohttps://download.docker.com/lin

Mastering Docker: A Guide for Linux UsersMastering Docker: A Guide for Linux UsersApr 18, 2025 am 12:08 AM

Using Docker on Linux can improve development efficiency and simplify application deployment. 1) Pull Ubuntu image: dockerpullubuntu. 2) Run Ubuntu container: dockerrun-itubuntu/bin/bash. 3) Create Dockerfile containing nginx: FROMubuntu;RUNapt-getupdate&&apt-getinstall-ynginx;EXPOSE80. 4) Build the image: dockerbuild-tmy-nginx. 5) Run container: dockerrun-d-p8080:80

Docker on Linux: Applications and Use CasesDocker on Linux: Applications and Use CasesApr 17, 2025 am 12:10 AM

Docker simplifies application deployment and management on Linux. 1) Docker is a containerized platform that packages applications and their dependencies into lightweight and portable containers. 2) On Linux, Docker uses cgroups and namespaces to implement container isolation and resource management. 3) Basic usages include pulling images and running containers. Advanced usages such as DockerCompose can define multi-container applications. 4) Debug commonly used dockerlogs and dockerexec commands. 5) Performance optimization can reduce the image size through multi-stage construction, and keeping the Dockerfile simple is the best practice.

Docker: Containerizing Applications for Portability and ScalabilityDocker: Containerizing Applications for Portability and ScalabilityApr 16, 2025 am 12:09 AM

Docker is a Linux container technology-based tool used to package, distribute and run applications to improve application portability and scalability. 1) Dockerbuild and dockerrun commands can be used to build and run Docker containers. 2) DockerCompose is used to define and run multi-container Docker applications to simplify microservice management. 3) Using multi-stage construction can optimize the image size and improve the application startup speed. 4) Viewing container logs is an effective way to debug container problems.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version