I have faced a certain problem while writing the following code to
run a shell command through a Java Program....

The code is...

{    public  static void termFrequencyVector() throws IOException
        {
                //String str1 = "man ls>test.txt";
                //Process p = Runtime.getRuntime().exec(str1);
                Runtime rt = Runtime.getRuntime();
                String[] envp = { "PATH=/fs11/bt2003/ankans" };
                Process p = rt.exec("ls", envp);
                //String str1 = "ls>test.txt";
                //Process p = Runtime.getRuntime().exec(str1);
        }

        public static void main(String [] args) throws Exception
        {
            termFrequencyVector();
        }
    }

I get the following error after the code compiles correctly...

Exception in thread "main" java.io.IOException: No such file or
directory
  at java.lang.ConcreteProcess.startProcess(java.lang.String[],
java.lang.String[], java.io.File) (/usr/lib/libgcj.so.5.0.0)
  at java.lang.ConcreteProcess.ConcreteProcess(java.lang.String[],
java.lang.String[], java.io.File) (/usr/lib/libgcj.so.5.0.0)
  at java.lang.Runtime.execInternal(java.lang.String[],
java.lang.String[], java.io.File) (/usr/lib/libgcj.so.5.0.0)
  at java.lang.Runtime.exec(java.lang.String[], java.lang.String[],
java.io.File) (/usr/lib/libgcj.so.5.0.0)
  at java.lang.Runtime.exec(java.lang.String, java.lang.String[],
java.io.File) (/usr/lib/libgcj.so.5.0.0)
  at java.lang.Runtime.exec(java.lang.String, java.lang.String[])
(/usr/lib/libgcj.so.5.0.0)
  at TFIDF.termFrequencyVector() (Unknown Source)
  at TFIDF.main(java.lang.String[]) (Unknown Source)

Please tell me whether it is possible to run commands like ls in this
way or am I writing the path name environment or command name wrong? I
dont think there is any mistake in the syntax of the code.
 Rohit