enumShrubbery{ GROUND, CRAWLING, HANGING }publicclassEnumClass{publicstaticvoidmain(String[] args){for(Shrubbery s : Shrubbery.values()) { System.out.println(s);// 返回每个枚举实例在声明时的次序System.out.println(s.ordinal());// 返回与此枚举常量的枚举类型相对应的 Class 对象System.out.pr...
In this method, we use thevalues()method to get all the enum constants of theColorenum. We then iterate over each enum constant and check if the name matches the key provided. If a match is found, we return the corresponding enum constant. Using the getValueByKey Method Now, let’s s...
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(String[]args){for(Seasonss:Seasons.values()){System.out.println(s);...
Additionally, enums come with many useful methods that we would otherwise need to write if we were using traditional public static final constants. 2. Custom Enum Methods Now that we have a basic understanding of what enums are and how we can use them, we’ll take our previous example to...
If your Java enum types contain a lot constants and you need to check a variable against the values as shown in the previous section, using a Javaswitchstatement might be a good idea. You can use enums in switch statements like this: ...
Use the fromString(String name) factory method. Creates a new instance of JavaVersion value. Method Details fromString public static JavaVersion fromString(String name) Finds or creates a Java version value based on the provided name. Parameters: name - a name Returns: a JavaVersion instan...
CMS:以获取最短回收停顿时间为目标,采用“标记-清除”算法,分 4 大步进行垃圾收集,其中初始标记和重新标记会 STW ,多数应用于互联网站或者 B/S 系统的服务器端上,JDK9 被标记弃用,JDK14 被删除,详情可见JEP 363。 2.5.2 分区收集器 G1:一种服务器端的垃圾收集器,应用在多处理器和大容量内存环境中,在实现...
and efficient. The space and time performance of this class should be good enough to allow its use as a high-quality, typesafe alternative to traditionalint-based "bit flags." Even bulk operations (such ascontainsAllandretainAll) should run very quickly if their argument is also an enum set...
MIN_VALUE; return d * m; } // To maintain full signature compatibility with 1.5, and to improve the // clarity of the generated javadoc (see 6287639: Abstract methods in // enum classes should not be listed as abstract), method convert // etc. are not declared abstract but otherwise ...
Find the demo's complete code in theModalityDemo.javafile. In Java SE 6 you can create a document-modal dialog box without a parent. Because theDialogclass is a subclass of theWindowclass, aDialoginstance automatically becomes the root of the document if it has no owner. Thus, if such ...