使用ProcessBuilder启动CMD [英] Start CMD by using ProcessBuilder

问题描述

我试图通过使用以下代码在Windows中启动CMD应用程序，但它不能按预期工作。来自不同网站的几个示例显示，cmd作为ProcessBuilder构造中的参数应该可以工作。

我必须做什么才能使我的Java应用程序打开CMD应用程序在窗口中？

  public class JavaTest 
 {
 public static void main（String [] args）
 {
 ProcessBuilder pb = new ProcessBuilder（cmd）; 
 
 try 
 {
 pb.start（）; 
 System.out.println（cmd started）; 
} 
 catch（IOexception e）
 {
 System.out.println（e.getMessage（））; 
} 
} 
} 
  

不存在的应用程序实际上打印出一个错误，这意味着它实际上运行CMD。但是CMD应用程序没有按预期弹出？

解决方案

您需要使用 start 命令。实际上，即使我没有看到一个新的命令提示符弹出，但你可以检查一个新的 cmd.exe 是绝对开始使用您的任务ProcessBuilder pb = new ProcessBuilder（cmd.exe，/ C，C：\\ Program Files \\ ProcessBuilder \\ ProcessBuilder \\）。

  开始）;但是，使用 Runtime.exec（）可以实现相同的功能  / code>，这实际上弹出一个新的命令提示符。
  Runtime.getRuntime cmd.exe / C start）; 
  
 
I am trying to start the CMD application in windows by using the following code, but it doesn't work as expected. Several examples from different websites shows that "cmd" as an argument in the ProcessBuilder construct should work.

What do I have to do to make my Java app open the CMD application in windows?
 public class JavaTest
 {
     public static void main(String[] args) 
     {
         ProcessBuilder pb = new ProcessBuilder("cmd");

         try 
         {
             pb.start();
             System.out.println("cmd started");
         } 
         catch (IOException e) 
         {
             System.out.println(e.getMessage());
         }  
     }
 }
When I try to use a non-existing application it actually prints out an error, so that means it actually runs "CMD". But the CMD application doesn't pop up as expected?
解决方案
You need to use the start command. Actually, even I don't see a new command prompt popping up, but you can check that a new cmd.exe is definitely started using your task manager.
ProcessBuilder pb = new ProcessBuilder("cmd.exe", "/C", "start");
Though, the same functionality can be achieved using Runtime.exec(), and this actually pops up a new command prompt.
Runtime.getRuntime().exec("cmd.exe /C start");


                        
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