1、 问题所示，主要因未安装JDK或未配置环境变量所致。 2、 右键点击电脑图标，选择属性即可查看系统信息。 3、 在左侧菜单中点击高级系统设置，然后打开环境变量选项。 4、 在系统变量中找到Path，点击编辑即可。 5、 进入JDK安装路径中的bin文件夹，复制该目录地址。 6、 将内容粘贴至系统变量Path末尾，需用英文分号与原变量隔开。 7、 保存新编辑的变量即可。

I'm in a Java class that requires us to use JDK1.3.1. The way that we are suppossed to compile is to use the command line and type: javac *.java within the C:\\jdk1.3.1_01\\bin directory. I'm ...

If the \bin directory of the JDK or JRE is not added to the Windows or Linux PATH variable, programs may not be able to find it at runtime. This would certainly cause the “Java not recognized” error, ...

JDK 23 also includes module import declarations, Markdown documentation comments, an eighth incubation of a vector API, and a preview of primitive types in patterns, instanceof, and switch.

Open this file and update the path to point to the newly downloaded JDK. Next, delete the other SQL Developer folder in AppData that contains the “tmp” and “systemXX.XX…” directories.