javac 版本和 java 版本在命令行上显示不同 [英] javac version and java version show different on command line

问题描述

之前，我有 java 8.我最近安装了 java 11.我将路径 Javajdk-11.0.7in 移到了环境变量的顶部.当我执行 javac -version 时，它给我版本 11.但是当我执行 java -version 时，它给我版本 8.我该如何解决这个问题?具体来说，我想运行一个使用 java 11 编译的 jar 文件.

Before, I had java 8. I recently installed java 11. I moved my path Javajdk-11.0.7in to the top of my environment variables. When I do javac -version it gives me version 11. But when I do java -version, it gives me version 8. How do I correct this? Specifically, I want to run a jar file that was compiled using java 11.

推荐答案

每当您安装 JDK 时，它也会询问 JRE 的路径.您可能提到了与 JAVA_HOME 不同的 JRE 路径或选择退出安装.如果发生这种情况，您应该卸载 Java 8 和 Java 11，然后再次安装 Java 11.但是，在执行此操作之前，您可以尝试/确保以下事项:

Whenever you install JDK, it asks for the path of JRE as well. There is a possibility that you mentioned a different path for JRE than the JAVA_HOME or opted out the installation. If that happened, you should uninstall both, Java 8 and Java 11 and then install Java 11 again. However, before you do this, you can try/ensure the following things:

1. 如果你把PATH设置为%JAVA_HOME%in，如果安装路径(即JAVA_HOME的路径)将不起作用代码>) 有空格.在这种情况下，您需要将绝对路径而不是 %JAVA_HOME%in 放在 PATH 环境变量中.
2. 在新的 cmd 窗口中尝试这些命令.
3. 重新启动系统.
4. 将 JDK bin 的路径移到用户变量和系统变量中的顶部.

1. If you have put the PATH as %JAVA_HOME%in, it won't work if the installation path (i.e. the path of JAVA_HOME) has space. In such a case, you need to put the absolute path instead of %JAVA_HOME%in in the PATH environment variable.
2. Try the commands in a new cmd window.
3. Restart the system.
4. Move the path of JDK bin to the top in both, User variables as well as System variables.

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