ubantu 安装 Maven 和 jdk 步骤

To install Maven and JDK (Java Development Kit) on Ubuntu, you can follow these steps:

Open a terminal on your Ubuntu system.

Update the package lists by running the following command:

sudo apt update
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Install Maven by running the following command:

sudo apt install maven
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This will install Maven and its dependencies.

Verify the installation by running the following command:

mvn --version
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This should display the version of Maven installed on your system.

Install JDK (Java Development Kit) using the following steps:

a. Check if Java is already installed on your system by running the following command:

yum list installed | grep java
或者
java -version
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If Java is not installed, you will see an error message.

b. select yum list package version

yum search java | grep -i --color jdk
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c. Install the default JDK package by running the following command:

yum install java-1.8.0-openjdk.x86_64
or
sudo apt install default-jdk
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This will install the default JDK package available in the Ubuntu package repository.

d. Verify the installation by running the following command:

javac -version
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This should display the version of the JDK installed on your system.

Additionally, you can also run the following command to check the Java Runtime Environment (JRE) version:

java -version
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This will display the JRE version.

e. jdk checkout version link

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-1.8.0-openjdk-amd64/bin/java 1
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java-1.8.0-openjdk-amd64/bin/javac 1
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f. use shell checkout version

sudo update-alternatives --config java
有 3 个候选项可用于替换 java (提供 /usr/bin/java)。

选择       路径                                          优先级  状态
------------------------------------------------------------
* 0            /usr/lib/jvm/java-17-openjdk-amd64/bin/java      1711      自动模式
1            /usr/lib/jvm/java-1.8.0-openjdk-amd64/bin/java   1         手动模式
2            /usr/lib/jvm/java-17-openjdk-amd64/bin/java      1711      手动模式
3            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      手动模式

要维持当前值[*]请按<回车键>，或者键入选择的编号：1
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That’s it! You have now installed Maven and JDK on your Ubuntu system. You can use Maven for building projects and the JDK for developing and running Java applications.

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