<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Giriş</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
</head>
<body>
<nav class="navbar navbar-expand-lg bg-body-tertiary">
<div class="container-fluid">
<a class="navbar-brand" href="#">Menü</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Anasayfa</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">İletişim</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Uygulamalar
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Yazılım</a></li>
<li><a class="dropdown-item" href="#">Hack</a></li>
<li><hr class="dropdown-divider"></li>
<li><a class="dropdown-item" href="#">Program</a></li>
<li><a class="dropdown-item" href="#">Kayıt</a></li>
<li><a class="dropdown-item" href="#">Giriş</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link disabled" aria-disabled="true">Disabled</a>
</li>
</ul>
<form class="d-flex" role="search">
<input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success" type="submit">ara</button>
</form>
</div>
</div>
</nav>
<div class="container">
<form>
<div class="mb-3">
<label for="exampleInputEmail1" class="form-label">Email addresi</label>
<input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
<div id="emailHelp" class="form-text">Email adresini kimseyle paylaşma.</div>
<div class="mb-3">
<label for="exampleInputPassword1" class="form-label">Şifre</label>
<input type="password" class="form-control" id="exampleInputPassword1">
</div>
<div class="mb-3 form-check">
<input type="checkbox" class="form-check-input" id="exampleCheck1">
<label class="form-check-label" for="exampleCheck1">18 den büyügüm</label>
</div>
<button type="submit" class="btn btn-primary">Giriş</button>
</form>
<button type="submit" class="btn btn-secondary"><a href="#">Kayıt ol</a></button>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script></body>
</html>
formları navbarda istediğiniz gibi yerleştirebilirsiniz form ve dropdown eklerken ordaki sayıyı arttırmanız lazım Herhangi bir hata alıyorsanız bootstrap ın java ve css kütüphanelerini indirin