public void setJoinedTimestamp(java.util.Date joinedTimestamp) {
        this.joinedTimestamp = joinedTimestamp;
    }
<p>
The date when the delegated administrator's account became a part of the organization.
</p>

@param joinedTimestamp
       The date when the delegated administrator's account became a part of the organization.
aws-java-sdk-organizations/src/main/java/com/amazonaws/services/organizations/model/DelegatedAdministrator.java