java - Arraylist is not returning the object -

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i dunno missing concept, have coded small project maintains contacts using java arraylist , gui. there add, delete,seach,first,last,previous,next,exit,clear buttons in application. buttons except first , last working fine. problem getting in function displayfirst**()

here code

addressbookdemo.java

    public void actionperformed (actionevent e){          if (e.getsource () == jbbsave){              saveperson();              clear();          }          else if (e.getsource() == jbndelete){              deleteperson();              clear();         }          else if (e.getsource() == jbnfirst){              displayfirstrecord();                      clear();          }          else if (e.getsource() == jbnlast){              displaylastrecord();              clear();          }          else if (e.getsource() == jbnsearch){              searchperson();         }           else if (e.getsource() == jbnforward){              displaynextrecord();          }          else if (e.getsource() == jbnback){             displaypreviousrecord();         }          else if (e.getsource() == jbnclear){             clear();         }          else if (e.getsource() == jbnexit){                      system.exit(0);         }      }       public void searchperson() {          name = jtfname.gettext();         name = name.touppercase();         /*clear contents of arraylist if there previous search*/         personslist.clear();            if(name.equals("")){             joptionpane.showmessagedialog(null,"please enter person name search.");         }         else{             /*get array list of searched persons using persondao*/             personslist = pdao.searchperson(name);              if(personslist.size() == 0){                 joptionpane.showmessagedialog(null, "no records found.");                 //perform clear if no records found.                 clear();             }             else             {                 /*downcast object array list personinfo*/                 personinfo person = (personinfo) personslist.get(0);                   // displaying search record in text fields                  jtfname.settext(person.getname());                 jtfaddress.settext(person.getaddress());                 jtfphone.settext(""+person.getphone());                 jtfemail.settext(person.getemail());             }         }       } **** public void displayfirstrecord(){           // dec in recordnumber display previous person info,           //stored in personslist during search                             if(pdao.getpersonslist().size() == 0 ){             joptionpane.showmessagedialog(null, "there no records");               /*if user has reached begining of results, disable button*/             jbnforward.setenabled(true);             jbnback.setenabled(false);               // inc 1 counter last dec          }else{                          system.out.println(pdao.getpersonslist().size());        personslist = pdao.getpersonslist();      personinfo person=(personinfo)personslist.get(0);             // displaying search record in text fields              jtfname.settext(person.getname());             jtfaddress.settext(person.getaddress());             jtfphone.settext(""+person.getphone());             jtfemail.settext(person.getemail());                         //jbnfirst.setenabled(false);         }       }  public void displaylastrecord(){           // dec in recordnumber display previous person info,           //stored in personslist during search                             if(pdao.getpersonslist().size()== 0 ){             joptionpane.showmessagedialog(null, "there no records");               /*if user has reached begining of results, disable button*/             jbnforward.setenabled(true);             jbnback.setenabled(false);               // inc 1 counter last dec                     }else{             jbnforward.setenabled(true);             personinfo person = (personinfo) pdao.getpersonslist().get(pdao.getpersonslist().size()-1);              // displaying search record in text fields              jtfname.settext(person.getname());             jtfaddress.settext(person.getaddress());             jtfphone.settext(""+person.getphone());             jtfemail.settext(person.getemail());         }       }  ********************

persondao.java

public class persondao{             private arraylist<personinfo> personslist;  *******************************       public arraylist searchperson(string name)     {             arraylist<personinfo> personslist1=new arraylist<>();              (personinfo personslist2 : personslist) {                 personinfo p = (personinfo) personslist2;                 if(p.getname() == null ? name == null : p.getname().equals(name)){                     personslist1.add(p);                     break;                 }             }          return personslist1;             }

personinfo.java

contains person class.

you're calling clear() method clears text of jlables 

else if (e.getsource() == jbnfirst){     displayfirstrecord();     clear();  } else if (e.getsource() == jbnlast){     displaylastrecord();     clear();  }

....

public void displayfirstrecord(){      ....      jtfname.settext(person.getname());     jtfaddress.settext(person.getaddress());     jtfphone.settext(""+person.getphone());     jtfemail.settext(person.getemail());      ....  }

.... displaylastrecord() method same thing.

public void clear(){     jtfname.settext("");     jtfaddress.settext("");     jtfphone.settext("");     jtfemail.settext("");      ....  }

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