public static void main(String[] args) throws Exception {
        String str = "E4B88B";
        //String str = "E38082";
        int len = str.length()/2;
        byte[]data = new byte[len];
        
        for(int i = 0;i < len;i++){
            String temp = str.substring(2*i,2*(i+1));
            data[i]=(byte)Integer.parseInt(temp,16);
        }

        String newstr = new String(data); 
        System.out.println(newstr);
    }