ProcessBuilder 的问题 [英] trouble with ProcessBuilder

问题描述

// following code works fine n open notepad...   
class demo
{
public static void main(String args[])
{
    try{
    ProcessBuilder pb=new ProcessBuilder("notepad");
    pb.start();
    }catch(Exception e)
    {System.out.print(e);}
}
}
 //however the above code throws an exception when any other system program is executed
class demo
{
public static void main(String args[])
{
    try{
    ProcessBuilder pb=new ProcessBuilder("calculator");
    pb.start();
    }catch(Exception e)
    {System.out.print(e);}
}
}

上面的程序抛出以下异常:

the above program throws following exception:

java.io.IOException: Cannot run program "Calculator": CreateProcess error=2, The system cannot find the file specified

推荐答案

您应该包含可执行文件的完整路径(包括目录和 .exe 扩展名).

You should include the full path to the executable (including the directories and the .exe extension).

实际上应该可以从您收到的错误消息中看出:-)

Should actually be apparent from the error message you got :-)

("notepad" 工作的原因表明它将搜索 %PATH% 并在必要时尝试附加 .exe.这导致我相信 "calc" 也可以工作:-)

(The reason "notepad" worked indicates that it will search %PATH% and try to append .exe if necessary. This leads me to believe that "calc" may also work :-)

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