类型参数类型为 Enum 的java.lang 中的类 class Enum<E extends Enum<E>> 这是所有 Java 语言枚举类型的公共基本类。类型参数类型为 Enum 的java.lang 中的方法 static <T extends Enum<T>> T Enum.valueOf(Class<T> enumType, String name) 返回带指定名称的指定枚举类型的枚举常量。返回变量类型为...
publicclassSimpleEnumUse{publicstaticvoidmain(String[] args){ Spiciness howHot = Spiciness.MEDIUM; System.out.println(howHot); } }// 输出:MEDIUM 在switch 中使用 enum,是 enum 提供的一项非常便利的功能。一般来说,在 switch 中只能使用整数值,而枚举实例天生就具备整数值的次序,并且可以通过 ordinal()...
// Enum that switches on its value to share code - questionableenumPayrollDay{MONDAY,TUESDAY,WEDNESDAY,THURSDAY,FRIDAY,SATURDAY,SUNDAY;privatestaticfinalintMINS_PER_SHIFT=8*60;intpay(intminutesWorked,intpayRate){intbasePay=minutesWorked*payRate;intovertimePay;switch(this){caseSATURDAY:caseSUNDAY://...
called EnumDemo$Seasons.class*/public class EnumDemo{/*declare the enum and add values to it.note that,like in#,we don't sea‘;’toend this statement and we use commas to separate the values*/private enum Seasons{winter,spring,summer,fall}//listthevaluespublic static void main...
public class SimpleEnumUse { public static void main(String[] args) { Spiciness howHot = Spiciness.MEDIUM; System.out.println(howHot); } } // 输出:MEDIUM 在switch 中使用 enum,是 enum 提供的一项非常便利的功能。一般来说,在 switch 中只能使用整数值,而枚举实例天生就具备整数值的次序,并且可以...
Array does not know what its index represents, it has to be labeled to the output manually. You have to be responsible to use the correct int value of an array; ints do not provide the type safety of enums. Advantages of using EnumMap for multidimensional sets. ...
Exclusion mode— Any top-level window can be marked not to be blocked by modal dialogs. This property enables you to set up themodal exclusionmode. TheDialog.ModalExclusionTypeenum specifies the possible modal exclusion types. Note :The new modality model does not implement a system modality, ...
Using the New Enum Once the enum class is defined, you can use it in your Java code to represent and work with the predefined constants. Here’s an example of how to use theDayenum: publicclassEnumExample{publicstaticvoidmain(String[]args){Daytoday=Day.MONDAY;System.out.println("Today is...
Returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero). Most programmers will have no use for this method. It is designed for use by sophisticated enum-based data structures, such as java.util.EnumSet ...
Here is some code that shows you how to use theDayenum defined above: public class EnumTest { Day day; public EnumTest(Day day) { this.day = day; } public void tellItLikeItIs() { switch (day) { case MONDAY: System.out.println("Mondays are bad."); ...