java - Object in arraylist printing null -

i'm trying make diary stores list of diary entries (diary) each title, date , entry. these added, deleted , displayed diarybook class. right i'm trying test printing out fields printing null. i've looked through similar questions , still can't work out why. i'm new java help/comments appreciated.

public class diarybook {  arraylist<diary> diarylist = new arraylist<diary>(); static scanner scanner = new scanner(system.in);  public void adddiary () {     string title;     string content;     calendar date;      string[] splitdate;      system.out.print("entry title: ");     title = scanner.nextline();      system.out.print("entry date (dd/mm/yyyy): ");     splitdate = scanner.next().split("/");     scanner.nextline();      int day = integer.parseint(splitdate[0]);     int month = integer.parseint(splitdate[1]);     int year = integer.parseint(splitdate[2]);      date = new gregoriancalendar(year,month-1,day);      system.out.print("entry: ");     content = scanner.nextline();      diary d = new diary (title, date, content);     diarylist.add(d);  }  public void printdiaries() {     (diary x:diarylist) {         x.gettitle();         x.getdate();         x.getcontent();     } } 

}

my diary class:

public class diary {

string title; calendar date; string content;  public diary (string title, calendar date, string content) {     title = this.title;     date = this.date;     content = this.content; }  public void gettitle() {     system.out.println(title); } public void getdate() {     system.out.println(date); } public void getcontent() {     system.out.println(content); } 

}

input:

entry title: blah entry date (dd/mm/yyyy): 22/12/1990 entry: 

output:

null null null 

thanks.

you've assigned wrong values wrong parameters...

public diary (string title, calendar date, string content) {     title = this.title;     date = this.date;     content = this.content; } 

this assigning values of instance variables parameters, has no effect...

instead, try assigning parameters instance variables...

public diary (string title, calendar date, string content) {     this.title = title;     this.date = date;     this.content = content; } 

also, get methods should return value, not print them...just saying...