Keep in mind that the valueOf method will throw an IllegalArgumentException if the specified string does not match any of the enum values. You can catch this exception or use the Enum.valueOf method, which takes an additional parameter specifying the type of the enum and returns null if the...
1)枚举类编译后会生成一个抽象类,继承java.long.Enum 2) 而枚举中定义的枚举常量,变成了相应的 public static final 属性,而且其类型就抽象类的类型,名字就是枚举常量的名字 3) 使用静态代码块做了如下操作 创建对象: 枚举类 变量 = new 枚举类(); 创建枚举值存储数组: 枚举类[] $VALUES = new 枚举类[]...
首先,Enum类位于java.lang包下,根据类的介绍可以发现,Enum类是Java中所有枚举类的父类,将枚举作为一个set或者Map的keys来使用具有很高的效率。 Enum类是一个抽象类,实现了Comparable和Serializable接口,在类中只有两个成员变量name和ordinal,分别表示枚举的名字和序号均为private,但是提供了两个方法来返回这两个字段分...
public<EextendsEnum<E>>Map<Integer, String>getMap(Class<E>enumType){ Map<Integer, String>map=newHashMap<Integer, String>(); //方法1 EnumSet<E>set=EnumSet.allOf(enumType); for(Enum<E>e : set){ map.put(e.ordinal(), e.toString()); }//方法2 E[] enums=enumType.getEnumConstants...
[Android.Runtime.Register("getEnumConstants", "()[Ljava/lang/Object;", "")] public Java.Lang.Object[]? GetEnumConstants(); Returns Object[] an array containing the values comprising the enum class represented by this Class object in the order they're declared, or null if this Class ob...
MetricValues element (Windows) IDCompositionVisual::SetOffsetY methods (Windows) IMediaRenderer::GetPositionInformationAsync method (Windows) MediaRenderer.remove_RenderingParametersUpdate method (Windows) StreamSelector.GetStreamPropertiesAsync method (Windows) IPlaybackManager::Advise method (Windows) operat...
Returns a hash code for this enum constant. Java documentation forjava.lang.Enum.hashCode(). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. ...
java.lang.String Overrides java.lang.Enum.toString() valueOf(String name) public static GetShareExpand valueOf(String name) Parameters name java.lang.String Returns GetShareExpand values() public static GetShareExpand[] values() Returns GetShareExpand[] ...
Possible values are: Manual - You control the application of patches to a virtual machine. You do this by applying patches manually inside the VM. In this mode, automatic updates are disabled; the property WindowsConfiguration.enableAutomaticUpdates must be false AutomaticByOS - The virtual machine...
point.x =4;//Use the settermethodforx.assert(point.x == 4); // Use the gettermethodforx.assert(point.y == null); // Values default to null. } 你也可以通过get和set关键字去重写属性默认的getters和setters方法。 classRectangle{