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Last updated: January 2020
Although the snooze button is probably the most commonly used button on an alarm clock, even a simple
AlarmClock class needs a few more features. For instance, you might want to control how long the alarm clock will stay in snooze mode. In order to add such a feature, you need to understand how Java controls data.
Developers use variables in Java to hold data, with all variables having a data type and a name. The data type determines the values that a variable can hold. In this tutorial, you’ll learn how integral types hold whole numbers, floating point types hold real numbers, and string types hold character strings.