Collection Framework (collection store custom objects and traverse cases)

 package cn.itcast_02;import java.util.arraylist;import java.util.collection;/* *   Exercise: Store 5 student objects in a collection and traverse through the student objects.  *  *  Analysis:  * a: Creating a Student Class  * b: Creating a Collection Object  * c: Creating a Student object  * d: Add a student to the collection  * e: sets the set to a group of  * f: iterates through the array  */public class studentdemo { public  static void main (String[] args)  {  //  Create collection Object   collection  c = new arraylist ();  //  Create student Object   student s1 = new  student ("Brigitte",  27)   student s2 = new student ("Wind Qing",  30);   student s3 = new student ("Linghutao",  33);   student s4 = new  student ("Wu Xin",  25);   student s5 = new student ("Lynn Qu",  22);   //  add students to the collection   c.add (S1);   c.add (S2);   c.add (S3);   c.Add (S4);   c.add (S5);  //  sets the set to the array   object[] objs = c.toarray ( );  //  traversal array   for  (int x = 0; x < objs.length;  x++)  {   // system.out.println (objs[x]);    student s =   (Student)  objs[x];   system.out.println (S.getname ()  +  "---"  +  S.getage ());   } }}

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Collection Framework (collection store custom objects and traverse cases)