Java 路径设置问题（无法在CMD中编译java）

Question

我尝试通过输入javac来编译java，即使在设置路径之后，它也给了我下面的响应，如果你能帮助我那就太好了，谢谢！

C:\Users\Hp>set path="C:\Program Files\Java\jdk1.8.0_333\bin"

C:\Users\Hp>javac
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compiler is doing
  -deprecation               Output source locations where deprecated APIs are used
  -classpath <path>          Specify where to find user class files and annotation processors
  -cp <path>                 Specify where to find user class files and annotation processors
  -sourcepath <path>         Specify where to find input source files
  -bootclasspath <path>      Override location of bootstrap class files
  -extdirs <dirs>            Override location of installed extensions
  -endorseddirs <dirs>       Override location of endorsed standards path
  -proc:{none,only}          Control whether annotation processing and/or compilation is done.
  -processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery process
  -processorpath <path>      Specify where to find annotation processors
  -parameters                Generate metadata for reflection on method parameters
  -d <directory>             Specify where to place generated class files
  -s <directory>             Specify where to place generated source files
  -h <directory>             Specify where to place generated native header files
  -implicit:{none,class}     Specify whether or not to generate class files for implicitly referenced files
  -encoding <encoding>       Specify character encoding used by source files
  -source <release>          Provide source compatibility with specified release
  -target <release>          Generate class files for specific VM version
  -profile <profile>         Check that API used is available in the specified profile
  -version                   Version information
  -help                      Print a synopsis of standard options
  -Akey[=value]              Options to pass to annotation processors
  -X                         Print a synopsis of nonstandard options
  -J<flag>                   Pass <flag> directly to the runtime system
  -Werror                    Terminate compilation if warnings occur
  @<filename>                Read options and filenames from file

Answer 1

您需要填写 javac 选项。这意味着您不能在没有要编译的文件的情况下只调用 javac。当您在没有任何参数的情况下在终端中编写 javac 时，默认情况下它将运行 javac -help 并显示您看到的选项。

要真正看看它是否有效：创建一个新的 java 文件。编译（在同一目录）：javac <java_file_name>.java 致运行：java <java_file_name>

Java 路径设置问题（无法在CMD中编译java）

Java Problem in setting path (can't compile java in CMD)

java

cmd

path

javac