java - How to set a value on a class using another class that is called/set in main class -

i have 3 classes, say: sharetype, sharetypestrue , main.

  public class sharetype {         public string sharetypename = "";         public string noofshare = "";         public string parvalue = "";          public void setsharetypename(string sharetypename) {             this.sharetypename = sharetypename;         }          public void setnoofshare(string noofshare) {             this.noofshare = noofshare;         }          public void setparvalue(string parvalue) {             this.parvalue = parvalue;         }      }      public class sharetypestrue {         public list<sharetype> sharetype;          public void setsharetype(list<sharetype> sharetype) {             this.sharetype = sharetype;         }      }      public class main {             sharetypestrue sharetypetrue = new  sharetypestrue();                 sharetypetrue.add(sharetypename);           } 

now problem need set sharetypename value under class sharetypestrue. meaning have use sharetypestrue call on sharetype class , set sharetypename.

anyone has idea?

note: cant change/add code in first 2 classes except in main. need find way around this. alot

please check below code main class.

import java.util.arraylist; import java.util.list;   public class main {   public static void main(string args[]){      sharetypestrue sharetypetrue = new  sharetypestrue();      //create object     sharetype sharetype = new sharetype();     sharetype.setsharetypename("original name");      //create list     list<sharetype> sharetypes=new arraylist<sharetype>();     sharetypes.add(sharetype);      //attach share     sharetypetrue.setsharetype(sharetypes);      //print     for(sharetype sharetypesmember:sharetypetrue.sharetype){         system.out.println(sharetypesmember.sharetypename);     }      //editing it.     for(sharetype sharetypesmember:sharetypetrue.sharetype){         sharetypesmember.sharetypename = "updated name";     }     //print     for(sharetype sharetypesmember:sharetypetrue.sharetype){         system.out.println(sharetypesmember.sharetypename);     }  } }