In this guide to Java enum with string values, learn to create enum using strings, iterate over all enum values, get enum value and to perform reverse lookup to find enum by string parameter. In thisguide to Jav
Enumsdon’t have methods for iteration, likeforEach()oriterator(). Instead, we can use the array of theEnumvalues returned by thevalues()method. 2.1. Iterate UsingforLoop First, we can simply use the old-schoolforloop: for (DaysOfWeekEnum day : DaysOfWeekEnum.values()) { System.out.pri...
iterate over the constants as follows: for(ElementType c : ElementType.values()) System.out.println(c); 当然这是不enum的values方法,但他们都是一样的,我也没找到再何处声明的这values,再网上找到了这样的说法: “values()方法,你应该理解为类型enum的特有方法,在这里,enum是声明一个类型,它与Enum是不...
TheIteratorinterface of theJava collections frameworkallows us to access elements of a collection. It has a subinterfaceListIterator. All the Java collections include aniterator()method. This method returns an instance of iterator used to iterate over elements of collections. Methods of Iterator TheIt...
public enum Direction { NORTH, NORTHEAST, EAST, SOUTHEAST, SOUTH, SOUTHWEST, WEST, NORTHWEST } 如何遍历获取所有的值? 解决方案,利用java编译器隐式声明的.values()方法 for (Direction dir : Direction.values()) { // do what you want }
public staticEnumType[]values() Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: for (EnumType c : EnumType.values()) System.out.println(c); ...
staticEnumTypevalueOf(Stringname) Returns the enum constant of this type with the specified name. staticEnumType[]values() Returns an array containing the constants of this enum type, in the order they are declared. Methods inherited from class java.lang.Enum ...
publicenumColor{RED,GREEN,BLUE} 1. 2. 3. 4. 5. 在上面的示例中,Color是一个枚举类型,它包含了三个枚举常量:RED,GREEN和BLUE。这些枚举常量可以作为一种特定的颜色来使用。 枚举值的存在性判断 在Java中,我们可以使用enum关键字定义的枚举类型的values()方法获得该枚举类型的所有枚举常量的数组。通过遍历这个...
10). Java 不支持 C 中的 enum 关键字。 11). Java 不支持 C 中的 bitfields 能力。 12). Java 不支持 C 的 typedef。 13). Java 不支持 C 的方法指针。 14). Java 不支持 C 的可变参数表。 java 和.net 的都不适合做桌面程序,这两个比较适合写 WEB 的程序; c++比较适合写桌面程序 c++/java...
staticTargetTypeEnumvalueOf(Stringname) Returns the enum constant of this type with the specified name. staticTargetTypeEnum[]values() Returns an array containing the constants of this enum type, in the order they are declared. Methods inherited from class java.lang.Enum ...