Java Get operating system path

Package com.kun.util;

Import Java.io.BufferedReader;
Import Java.io.InputStreamReader;

public class Testospath {static process process;

public static void Main (string[] args) {
try {
string[] cmd = new string[] {"cmd.exe", "/C", "Path"};
Process = Runtime.getruntime (). exec (CMD);
InputStreamReader ir = new InputStreamReader (process
. getInputStream ());
BufferedReader br = new BufferedReader (IR);
String Line;
String path= "";
while (line = Br.readline ())!= null) {
Path+=line;
}
SYSTEM.OUT.PRINTLN (path);
Path=path.substring (path.indexof ("=") +1). toLowerCase ();

String[] Temp=path.split (";");
for (int i=0;i<temp.length;i++) {
if (Temp[i].indexof ("Windows")!=-1) {
Path=path.substring (0,temp[i].indexof (":"));
Break
}
}
SYSTEM.OUT.PRINTLN (path);
}

            catch   (java.io.IOException    e)    {  
                     System.err.println ("ioexception  "    +    e.getmessage ());  
                     e.printstacktrace ();  
            }  
   }
}