Backup postgre via java

try{  
ProcessBuilder pb;  
Process p;  
pb = new ProcessBuilder("C:/Program Files/PostgreSQL/8.4/bin/pg_dump.exe ", "-i", "-h", "localhost", "-p", "5432","-U", "seuusuario", "-F", "c", "-b", "-v" ,"-f", "C:\\Users\\MARK\\Desktop\\TesteBKP.sql", "teste");  
pb.environment().put("PGPASSWORD", "suasenha");  
pb.redirectErrorStream(true);  
p = pb.start();   
}catch(Exception ex){  
    JOptionPane.showMessageDialog(null, ex);  
}