Java applications process data by evaluating expressions, which are combinations of literals, method calls, variable names, and operators. Expression evaluation typically produces a new value, which can be stored in a variable, used to make a decision, and so on. In this second article in the Java 101: Foundations mini-series, I'll show you how to create expressions for your programs. Many expressions involve operators, including additive, array-index, bitwise, conditional, and equality types. I'll introduce each operator and its operands, and also discuss important concepts such as operator overloading and operator precedence. We'll conclude with a primer on operator type conversion, including a small program that you can use to practice type conversions on your own. Note that examples in this article are based on Java 8.
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