Java Basic Knowledge Hardening Collection Framework note 12:collection Collection stores strings and iterates through

1. Collection collection stores strings and iterates through

Analysis:

(1) Creating a Collection Object

(2) Creating a String Object

(3) Adding a String object to the collection

(4) Traversing the collection

2. code example:

1  Packagecn.itcast_04;2 3 Importjava.util.ArrayList;4 Importjava.util.Collection;5 ImportJava.util.Iterator;6 7 /*8 * Requirement: Store string and traverse. 9  * Ten * Analysis: One * A: Create A Collection Object  A * B: Create a String object  - * C: Add a String object to the collection  - * D: traversing the collection  the  */ -  Public classCollectiontest { -      Public Static voidMain (string[] args) { -         //To create a collection object +Collection C =NewArrayList (); -  +         //creating a String Object A         //to add a string object to the collection atC.add ("Brigitte"); -C.add ("Breeze"); -C.add ("Elina"); -C.add ("Wu Xin"); -C.add ("Lynn Song"); -  in         //iterating through the collection -         //getting an iterator object from a collection object toIterator it =c.iterator (); +         //the Hasnext () method of an Iterator object to determine if there are any elements -          while(It.hasnext ()) { the             //get an element by the next () method of an Iterator object *String s =(String) It.next (); $ System.out.println (s);Panax Notoginseng         } -     } the}

The results of the operation are as follows:

Java Basic Knowledge Hardening Collection Framework note 12:collection Collection stores strings and iterates through