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Welche der folgenden Aussagen ist wahr?
Welche der folgenden Aussagen ist nicht richtig?
Was ist eine Enumeration?
Wie werden Enumerationen erstellt?
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Welche der folgenden Aussagen ist wahr?
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Study Notes
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An enumeration is a collection of similar items that can be accessed by name.
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Enumerations can be created in two different ways--one with a static initializer and one with a constructor.
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Every enumeration has a name and an integer value that represents that enumeration.
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Enumerations can be used to group together a set of related constants.
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Enumerations can be used to store information about the status of objects.
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Enumerations can have values that are defined only in certain ranges.
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An enumeration can have values that are defined by an interface.
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Enumerations can be inherited by other classes or modules.
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Enums are reference types
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Every value is possible to compare with ==, but not all values can be used in a text representation.
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Enums are an extension of the java.lang.Enum class.
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The constructor is private, and users cannot create their own elements.
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Each enum constant has a name, a ordinal, and a toString() method.
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Enums are classes, and can contain additional fields and methods.
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Enums can also have constructors, just like other classes.
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In a switch statement, you can use an enum type or a datatype that has the equals() method.
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You can use a switch statement to select one of several code blocks depending on the value of a variable.
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The code block that is selected is assigned to the variable that was used in the switch statement.
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You can also use a switch statement to select one of several values for a variable.
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The code block that is selected is executed.
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