预习集合数组对象泛型

使用System.ArrayList使用哈希表对象2System.Array简介3-score intscore[]=newscorescore score scoreintscorescore score2scorescore2scorescorecor[cor[ System.Array简介3-数组定义：数组定义：数据类型数组名称 1] a int[]MyArray={123456 MyArray[0]=4System.Array简介3-Arrayobj=5System.Array

6示例2-staticvoidMain(string[]{//objNamesArrayobjNames=ue(Aue(A

objNames5<5;<5;{ ine(“{0}:7 //ine("\n// for(intctr=0;ctr<5;{ ine(“{0}:}8 EmployeeEmployeeSystem.Collections简介2-类 单个元

00123索引(下标

ArrayList引入System.Collections命名空间usingusing…ArrayListStudents=newArrayListTeachers=newArrayListintAdd(Objectvalue)//

ArrayListstudents=newStudentscofield=newStudent("Scofield",Genders.Male,28, …

ArrayList(类型ArrayList[index]//(类型Studentstu1=(Student)students[0];…

删除ArrayListArrayList.Remove(对象名)//ArrayList.Remove(对象名)//删除指定对象名的对象ArrayList.RemoveAt(index)//删除指定索引的对象ArrayList.Clear()//清除集合内的所有元素Studentleave=(Student)students[0];剩ArrayList

for(inti=0;i<students.Count;{StudentstuFor=(Student)students[i];

}foreach//

foreach(Objectstuoin{StudentstuForeach=(Student)stuo; }

打印对象的Name

Studentstu1=

动态 长ArrayListHashTable通常称为哈希表001键值

2323……students.Add(scofield.Name

…Studentstu2=(Student)students[“

…

演示

foreach(Objectstuoin{Studentstu=(Student)stuo; }

foreach(stringnamein{

}可以遍历

TeacherjackynewTeacher("成龙龙4);foreach(Objectstuoin{Studentstu= }演示

龙

List<TList<Student>students=newList<Student>(); …

只能保存Studentforeach(Studentstuin{

}演示

List<T> Studentstu1=//List<Student>foreach(Studentstuin{

}

List<T>与List<T>ArrayList Dictionary<K,V Dictionary<string,Student>students=newDictionary<string,Student>(); Dictionary<K,V 方式与哈希表相students.Add(scofield.Name, studentstu2…

//Dictionary<stringStudentforeach(Studentstudent{