Difference between assigning a boolean variable a value and assigning a result of a comparison in Java

My collegues passed me some code, and there are problems when I run the code. Here is some part of it

boolean purchased = false;
conn = DriverManager.getConnection(connectionUrl, connectionUser, connectionPassword);
stmt = conn.createStatement();
String sql = new StringBuilder().... // some query

rs = stmt.executeQuery(sql);
while (rs.next()) {
    //some code
    purchased = rs.getInt("purchased") == 1;
    print(" purchased:" + purchased);
}

This always printed purchased as false. I changed that part to this:

while (rs.next()) {
    //some code
    if(rs.getInt("purchased") == 1) purchased = true;
    print(" purchased:" + purchased);
}

Now it works perfectly.

note: my ResultSet can have only 1 record. And in DB purchased is bit type, so there can be no other values than 0/1.

What is the difference between those two ways of writing ? as I know both should work the same way.