https://itnext.io/more-about-java-data-type-and-operators-ed8f649a2491

This article returns to the subject of Java’s data type and operators. It discuss arrays, the String type, the bitwise operator, and the ? ternary operator. It also covers Java’s for-each style for loop. Along the way, command line arguments are described!

An array is a collection of variables of the same type, referred to by a common name. In Java, arrays can have one or more dimensions, although the one-dimensional array is the most common. Arrays are used for a variety of purposes because they offer a convenient means of grouping together related variables. For example, you might use an array to hold a record of the daily high temperature for a month, a list of stock price average, or a list of your collection of programming books.