How To in Jdeveloper ADF Tutorials – Add Date based on another Date


How to calculate the datefield by considering another datefield that’s entered in by the user.
If you have entered a datefield “Today” as 12/04/2012
Now the requirement is to calculate another datefield’s date as 12/04/2012 + 30 days?


  • Have two fields in the page. inputDate1 and inputDate2 bounded to the value in the bean as date1 and date2.
  • set inputDate1 autosubmit=true, and inputDate2 partialTrigger is set to the id of the inputDate1

<af:inputDate label="Date 1" id="id1" value="#{bean.date1}" autoSubmit="true"/>
<af:inputDate label="Date 2" id="id2" value="#{bean.date2}" partialTriggers="id1"/>

in the bean for the date fields. have getter and setter

in the getter of the date2 field have the following code

private Date date1;
private Date date2;

public void setDate1(Date date1) {
this.date1 = date1;

public Date getDate1() {
return date1;

public void setDate2(Date date2) {
this.date2 = date2;

public Date getDate2() {
if(date1 != null){
Calendar cal =Calendar.getInstance();
cal.add(Calendar.DATE, 30);
date2 = cal.getTime();
return date2;

The source code is downloaded from here, for Jdeveloper


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