collections - Compare each records of list to others (based on some parameters ) in java 8 -

i having 1 list of custom objects (around 20,000 or 30,000 records), -> need compare records subsequent records based on 3 parameters(type, name , country )and -> if records find equal, have check date these 2 records -> , have keep record recent date validated status , marking other record old status.

note- max 1 record can equal 1 record / @ time not 3 or more records can equal

right now, using arraylist , implemented equals method in domain class based on 3 parameter. checking each record other records , if found equal -> doing date check , marking status accordingly , breaking , continuing other records -> @ end removing d records status 'old'

can achieve in java 8 or other apis apache commons, in effective way?

code snippet-

`public class domain implements comparable<domain> {  private string type;     private string name;     private string country;     private date vailddate;     private string staus;      getter setter      equals method based on type, name , country      public int compareto(domain domain) {             return (this.vailddate).compareto(domain.getvailddate());      }   }       in spring service class       public void savevalidatedrecords() throws ioexception {          list<domain> validatedrecordsinfile = processexternalftpfile();         list<domain> dbrecords = dao.findrec(integer id);         //i have compare db rec , file records , process according question , merging both list , processing         list<domain> listtobesaved = new arraylist<domain>(dbrecords.size()+validatedrecordsinfile.size());         listtobesaved.addall(validatedrecordsinfile);         listtobesaved.addall(dbrecords);         (int i= 0; i< listtobesaved.size(); i++) {             (int j= i+1;j< listtobesaved.size() ;j++) {              if (listtobesaved.get(i).equals(listtobesaved.get(j)) ) {                 if(listtobesaved.get(i).getvaliddate().after(listtobesaved.get(j).getvaliddate()) {                     listtobesaved.get(i).getstatus("valid");                      listtobesaved.get(j).getstatus("old");                      break; //since 1 record equal , control goes outer                 }             }          }     }` 

i can use 2 list here, no need merge.

thanks