Enumeration en=CommPortIdentifier.getPortIdentifiers();//iterate through the ports.while(en.hasMoreElements()) { portId=(CommPortIdentifier) en.nextElement();if(portId.getPortType() ==CommPortIdentifier.PORT_SERIAL) { System.out.println(portId.getName()); } myPort= portId;//任意取一个串口,比如...
2.1. When to Use Enumeration We can useEnumerationwhen we want to iterate over the elements of any legacy collection classes in a fail-safe manner. 2.2. Enumeration Example We can get theEnumerationobject by calling the.elements()method on the collection class object. ...
used to iterate over the elements of a Collection (List, Set or Map). The Iterator helps in retrieving the elements from the specified collection one by one and optionally performs operations over each element. Java Iterator was first introduced in Java 1.2 as a replacement of Enumerations. ...
This loop prints all days to the console. Thevaluesmethod returns an array containing the constants of thisenumtype, in the order they are declared. This method may be used to iterate over the constants with the enhanced for statement. The enhancedforgoes through the array, element by element,...
iterate 迭代iterative 反复的、迭代的iterator 迭代器iteration 迭代 (回圈每次轮回称为一个 iteration)item 项、条款、项目JIT compilation JIT 编译 即时编译key 键 (for database)key column 键列 (for database)laser 激光late binding 迟绑定left outer join 左向外联接 (for database)...
To create aQueueBrowserfor a queue, you call theSession.createBrowsermethod with the queue as the argument. You obtain the messages in the queue as anEnumerationobject. You can then iterate through theEnumerationobject and display the contents of each message. ...
You can then iterate through the Enumeration object and display the contents of each message.The messagebrowser/src/java/MessageBrowser.java program performs the following steps: Injects resources for a connection factory and a queue. Creates a Connection and a Session. Creates a QueueBrowser: ...
You may create objects yourself which will allow this statement to iterate through your object's enumeration. I recommend looking at this documentation, which will tell you what interfaces to implement and what to do to make this happen. virtual/override/new These three keywords go hand-in-hand...
In the early days of Java, Enumeration was used to iterate over elements of data. The Enumeration interface defines the methods by which we can enumerate (obtain one element at a time) the elements in a collection of objects. The two primary collection classes were Vector and Hashtable. ...
implements behavior that iterates through a collection, obtaining the elements of that collection one by one. The enumerator classes define behavior that bothHashTableandVectorfind useful. Other, as yet undefined collection classes, such as list or queue, may also need the behavior of the enumerat...