java不同版本jdk切换
jdk环境搭建首先要有java环境，然后安装两个不同版本的jdk，我这里就使用java8和java15
CLASSPATH.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar
JAVA_HOME %JAVA_HOME8% //默认使用java8
JAVA_HOME8D:\jdk//这里工具你自己放的地方进行配置
JAVA_HOME15D:\jdk-15.0.2
Path中的
%JAVA_HOME%\BIN //这里我们先用java8来配置也就是JAVA_HOME呼应上面的JAVA_HOME
%JAVA_HOME%\jre\bin
D:\jdk\bin //jdk的bin目录跟%JAVA_HOME%\BIN呼应等会用于调用
D:\jdk-15.0.2\binhttps://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109180554124-1969474238.png
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109180620712-802870891.png
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109180640943-89802270.png
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109180804018-809268665.png
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109183824982-959693226.png
配置完之后，在jdk目录下新建一个script文件夹，里面用于放置切换java版本的程序
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109181707654-1283305911.png
文件 java8.bat
内容:
@echo off
set JAVA_HOME=D:\jdk # JAVA_HOME后面是 jdk1.8的安装路径
set Path=%JAVA_HOME8%\bin;%Path%
echo Java 8 activated.
这里%JAVA_HOME8%呼应前面的JAVA_HOME8https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109183508315-345579057.png
文件 java15.bat
内容:
@echo off
set JAVA_HOME=D:\jdk-15.0.2 # JAVA_HOME后面是 jdk15的安装路径
set Path=%JAVA_HOME15%\bin;%Path%
echo Java 15 activated.
//这里%JAVA_HOME15%呼应前面的JAVA_HOME15https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109182003027-254051946.png
紧接着将script的执行路径写入到环境变量，添加.bat文件类型
D:\jdk\script//我这里新建在jdk所以使用这个路径
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109182258414-561760048.png
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109183126598-644814207.png
配置完成后，win+R cmd查看java版本信息，java -version
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109182712191-706423523.png
切换java15 ，java15
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109182829621-188726157.png
切换回java8，java8
https://img2023.cnblogs.com/blog/2913000/202301/2913000-20230109183725081-803240850.png
免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！
页:
[1]