How to integrate java web app in okta

I want to create some visible widget in okta interface, on which i can click and it will redirect to my web app page and works as it is working already.
only change will be to add extra authentication of okta.
Flow–> Okta login–>click on my web app–> my app page opens.

Please help on this. whatever information i got was like hit on web app link then okta authenticate but i need first okta login then i can click on my app showing in okta dashboard.

What type of Java app are you building? (Spring?)

everything is there spring MVC, struts, hibernate, servlet

Actually i need SWA app wizard to add my app, but it is not showing, Only SAML, oauth and openID connect is showing.