android - getStringArrayListExtra output with Square Brackets -

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i'm learning android intent. need show list of items when showlist button clicked, without using listview or spinner.here parts of code:

firstactivity class (main)

    // add item function     public void additem (view v){         if((textutils.isempty(item_in.gettext().tostring()))||(item_in.gettext().tostring().contains(" "))){         input_error_alert.setmessage("data not correct").setpositivebutton("edit data",null).show();         }          else{         confirm_alert.setmessage("data correct").setpositivebutton("ok",null).show();         itemlist.add(item_in.gettext().tostring());         item_in.settext("");         }     }       public void showlist (view v){     //create intent secondactivity      intent show = new intent(this,secondactivity.class);      bundle b = new bundle();      b.putstringarraylist("itemlist",itemlist);      show.putextras(b);      startactivity(show); }

secondactivity class

    protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_second);      list = (edittext)findviewbyid(r.id.shopping_list);      intent show = getintent();     arraylist<string> item_list = show.getstringarraylistextra("itemlist");     list.settext("your shopping list includes: "+item_list);      }

the output is: "your shoppping list includes: [item1, item2,...]. explain how brackets [] appear in output? how remove it?

thanks lot!

intent show = getintent(); arraylist<string> item_list = show.getstringarraylistextra("itemlist"); stringbuilder s = new stringbuilder(100);  for(int i=0; i<= item_list.size(); i++){      s.append(list.get(i) + ","); } list.settext("your shopping list includes: "+s.tostring());

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