Given a string, if the string "del" appears starting at inde

public String delDel(String str) {

  String name=new String();
  if(str.length()<3)
  {
    return str;
  }

if((str.charAt(1)=='d') && (str.charAt(2)=='e')&&(str.charAt(3)=='l'))
 {
 return str.replace("del","");
 }
 else{
   return str;
 }
}