I'm using JDBC to execute "select customer_name from customer where customer_num = ? " in database by calling prepareStatement->setInt(1,n)->executeQuery->getString.
But the result is correct for the first attempt only. When I using a for-loop to change variable n and all of the results will become the same as the first record I retrieved! Please give me some advice on how to use prepareStatement correctly! Thank you for your help!
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Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects.
Interface Comparable is used to allow objects of a cl…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop.
Define While Loop: