Question

我正在尝试编写名为HelloWorld的第一个Java程序，但我遇到了以下错误：

javac：找不到文件：HelloWorld.java

用法：javac

我的系统：Windows 10, 64bit

档案路径：C:\ProgramFiles\Java\jdk9.0.4\bin;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\

我担心Java出了问题。当我在cmd中输入java时，我会收到以下错误：

C：\ Users \ Kamil＆gt; java用法：java [options] [args ...]              （执行一个类）或java [options] -jar [args ...]              （执行jar文件）或java [options] -m [/] [args ...]          java [options] --module [/] [args ...]              （执行模块中的主类）

主类-jar，-m或--module之后的参数   /作为主类的参数传递。

其中选项包括：

-d32          Deprecated, will be removed in a future release
-d64          Deprecated, will be removed in a future release
-cp <class search path of directories and zip/jar files>
-classpath <class search path of directories and zip/jar files>
--class-path <class search path of directories and zip/jar files>
              A ; separated list of directories, JAR archives,
              and ZIP archives to search for class files.
-p <module path>     A ; separated list of directories, each directory
              is a directory of modules.
--upgrade-module-path <module path>...
              A ; separated list of directories, each directory
              is a directory of modules that replace upgradeable
              modules in the runtime image
--add-modules <module name>[,<module name>...]
              root modules to resolve in addition to the initial module.
              <module name> can also be ALL-DEFAULT, ALL-SYSTEM,
              ALL-MODULE-PATH.
--list-modules
              list observable modules and exit
-d <module name>
--describe-module <module name>
              describe a module and exit
--dry-run     create VM and load main class but do not execute main method.
              The --dry-run option may be useful for validating the
              command-line options such as the module system configuration.
--validate-modules  validate all modules and exit
              The --validate-modules option may be useful for finding
              conflicts and other errors with modules on the module path.
-D<name>=<value>
              set a system property
-verbose:[class|module|gc|jni]
              enable verbose output
-version      print product version to the error stream and exit
--version     print product version to the output stream and exit
-showversion  print product version to the error stream and continue
--show-version
              print product version to the output stream and continue
--show-module-resolution
              show module resolution output during startup
-? -h -help
              print this help message to the error stream
--help        print this help message to the output stream
-X            print help on extra options to the error stream

有人可以帮助识别它的含义吗？我重新安装了它，但它仍然是一样的。

Answer 1

打开cmd。每行输入后输入：

D:
cd practice
javac HelloWorld.java

java安装问题

1 个答案: