If you are using JPA or Hibernate directly and got that exception while starting your application, there is one obvious reason for that. You forgot to add that table in MySQL database or any other database that you are using. But if the table is present, then most likely it is a database user permission … Read more
I have seen people getting confused about how a binary heap can be built in O(n) time complexity. There are online articles & videos regarding this. I will try to explain it in my own way as simply as possible. First thing first, a binary heap is a complete binary tree. All levels of complete … Read more
Well, practically there is not much difference. If you check Java doc, you will notice that Closeable interface extends AutoCloseable interface. But there is one difference & that explains the reason why AutoCloseable interface was introduced in Java 7. Closeable close() method can throw IOException only. And that made sense as you will be using … Read more