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Hibernate Tip: How to select a specific subclass from an inheritance hierarchy

Hi, I’m Thorben Janssen from thoughts-on-java.org with a new Hibernate Tip. When you model an inheritance hierarchy in your domain model, you sooner or later want to use it in a query. That’s when I often get a question like the following one: I have a many-to-many association to the superclass of an inheritance hierarchy. […]

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Polar Molecules Tutorial: How to determine polarity in a molecule

in which we will explore how bond polarity affects the polarity of a molecule so what is polarity? First molecules are neutral; the entire molecule has an equal amount of protons and electrons; with that in mind if the negative charge, the electrons in a molecule, are evenly distributed around the molecule, then it is […]

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