安装JDK21

安装步骤:

1.在opt目录下建立一个jdk目录

 

sudo mkdir /opt/jdk
sudo chown -R hj:hj /opt/jdk/

 

2.下载传输

jdk下载地址: https://aka.ms/download-jdk/microsoft-jdk-21-linux-x64.tar.gz

打开cmd

 

scp D:\microsoft-jdk-21.0.11-linux-x64.tar hj@192.168.3.97:/opt/jdk

 

3.解压

cd /opt/jdk
sudo tar -zxvf microsoft-jdk-21.0.11-linux-x64.tar.gz

 

4.将解压之后的目录剪切到特定目录

sudo mkdir /usr/local/java
sudo mv /opt/jdk/jdk-21.0.11+10 /usr/local/java/

 

5.打开配置环境变量的配置文件

sudo nano /etc/profile
#加上下面两句话
export JAVA_HOME=/usr/local/java/jdk-21.0.11+10
export PATH=$JAVA_HOME/bin:$PATH

 

6.刷新profile

source /etc/profile

 

7.编写一个Hello.java文件测试

public class Hello
{
        public static void main(String[] args)
        {
              System.out.println(“Hello, java.”);
        }
}                    

javac Hello.java
java Hello.java