publicstatic<TextendsEnum<T>>TvalueOf(Class<T>enumType,Stringname){returnEnum.valueOf(enumType,name);} 1. 2. 3. 上述代码通过反射的valueOf()方法来获取指定枚举类型的值。其中,enumType参数是枚举类型的Class对象,name参数是要获取的枚举值的名称。该方法会返回一个枚举值,如果找不到对应的值,则会抛...
除了使用Enum类的values()方法,我们还可以通过反射的方式动态获取枚举类型中的所有值。下面是一个示例代码: importjava.lang.reflect.Field;publicclassReflectionExample{publicstaticvoidmain(String[]args){try{Class<?>enumClass=Class.forName("Season");Field[]fields=enumClass.getDeclaredFields();for(Fieldfield:...
values() 返回枚举类的所有常量; ordinal() 返回枚举常量的序号 valueOf(String name) 返回名为name的枚举常量,如果存在。 //演示 values(), ordinal() 和 valueOf() 方法enumColor { RED, GREEN, BLUE; }publicclassTest {publicstaticvoidmain(String[] args) { Color arr[]=Color.values();for(Color ...
}//获取注解的信息AutoEnum anno2 = f.getAnnotation(AutoEnum.class);if(anno2!=null&&value!=null) {//注解的pathString path =anno2.path();//注解的fieldNameString fieldName =anno2.fieldName();//通过value过去枚举中对应的中文说明String enumValues =InterprectChineseUtils.enumExplain(path, value....
values()) { System.out.println(food); } } } interface Food { enum JapaneseFood implements Food { suse, fishpiece } } enum chineseFood implements Food { dumpling, tofu } 枚举类集合 java.util.EnumSet和java.util.EnumMap是两个枚举集合。EnumSet保证集合中的元素不重复;EnumMap中的 key是enum类型...
It can only be assigned with 4 values. pizzaSize = Size.SMALL; pizzaSize = Size.MEDIUM; pizzaSize = Size.LARGE; pizzaSize = Size.EXTRALARGE; Example 2: Java Enum with the switch statement enum Size { SMALL, MEDIUM, LARGE, EXTRALARGE } class Test { Size pizzaSize; public Test(Size ...
All the constants of an enum class can be obtained by calling the implicit public static T[] values() method of that class. Added in 1.5. Java documentation for java.lang.Enum.valueOf(java.lang.Class<T>, java.lang.String). Portions of this page are modifications based on work created ...
Returns the enum constant of the specified enum class with the specified name. C# Copiere [Android.Runtime.Register("valueOf", "(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;", "")] [Java.Interop.JavaTypeParameters(new System.String[] { "T extends java.lang.Enum<T>" })] ...
T, the implicitly declaredpublic static T valueOf(String)method on that enum may be used instead of this method to map from a name to the corresponding enum constant. All the constants of an enum class can be obtained by calling the implicitpublic static T[] values()method of that class...
for (ActivityTypeEnum item : ActivityTypeEnum.values()) { if (item.getKey().equals(key)) { return item; } } throw new RuntimeException("通过key获取枚举类异常"); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.