Java多版本安装

1、下载

Java8

https://www.oracle.com/java/technologies/downloads/#java8

Java11

https://www.oracle.com/java/technologies/downloads/#java11

Java17

https://www.oracle.com/java/technologies/downloads/#java17

Java21

https://www.oracle.com/cn/java/technologies/downloads/#jdk21-windows

2、安装

3、环境配置

JAVA_HOME

在系统变量中新建变量，变量名JAVA_HOME，JAVA_HOME8，JAVA_HOME17如图所示：

JAVA_HOME
JAVA8_HOME
JAVA11_HOME
JAVA17_HOME
JAVA21_HOME

%JAVA21_HOME%

path配置

%JAVA_HOME%\bin

3、切换JDK版本

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