How can the current date be output and formatted? Up to Java 7, the classes Dateand represent GregorianCalendartwo options for displaying the current date. Formatting is done by the classes DateFormatand their derivation SimpleDateFormat. Starting with

What are inner classes? Java inner class In contrast to so-called top-level classes , which are defined as an independent compilation unit directly in their own *.javafiles, inner classes are those that lie

Java enumeration class With enums (short for enumeration) Java offers you as a programmer the possibility to define predefined constants for your variables. This is particularly useful when a variable

string in java A Java string is nothing more than a string like you’ve seen it countless times. In the most famous program in the world, you have e.g. the

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