Add .form-inline for left-aligned and inline-block controls for a compact layout.
<!DOCTYPE HTML>
<html>
<head>
<link href="http://java2s.com/style/bootstrap.min.css" rel="stylesheet">
</head><!--from w w w . ja v a2 s.c om-->
<body style='margin:20px;'>
<form class="form-inline">
<input type="text" class="form-control" placeholder="Email">
<input type="password" class="form-control" placeholder="Password">
<div class="checkbox">
<label>
<input type="checkbox"> Remember me
</label>
</div>
<button type="submit" class="btn btn-default">Sign in</button>
</form>
</body>
</html>