java擷取作業系統路徑

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();  
            }  
    }
}