package jihe;

import java.util.*;

/**

 * 备选课程类

 * @author Alan

 *

 */

public class ListText {

/**

* 用于存放备选课程的List

*/

public List coursesToSelect;

public ListText(){

this.coursesToSelect = new ArrayList();

}

/**

* 用于往coursesToSelect中添加备选课程

*/

public void testAdd(){

Course c1 = new Course("1","数据结构");

coursesToSelect.add(c1);

Course temp =(Course)coursesToSelect.get(0);

System.out.println("1添加了课程："+temp.id+":"+temp.name);

Course c2 =new Course("2","Java");

coursesToSelect.add(0,c2);

Course temp1= (Course)coursesToSelect.get(0);

System.out.println("2添加了课程："+temp1.id+":"+temp1.name);

Course c3 =new Course("3","C语言");

coursesToSelect.add(0,c3);

Course temp2= (Course)coursesToSelect.get(0);

System.out.println("3添加了课程："+temp2.id+":"+temp2.name);

Course[] course = {new Course("4","线性代数"),new Course("5","C#") }; 

coursesToSelect.addAll(Arrays.asList(course));

Course temp3 = (Course)coursesToSelect.get(3);

Course temp4 = (Course)coursesToSelect.get(4);

System.out.println("添加了两门课程："+temp3.id+":"+temp3.name+"/"+temp4.id+":"+temp4.name);

}

/**

* 使用set方法修改List中的值

* @param args

*/

public void testModify(){

coursesToSelect.set(4,new Course("8","毛概"));

}

//排列输出

public void textGet(){

int size = coursesToSelect.size();

for(int i=0;i<size;i++){

Course cr=(Course)coursesToSelect.get(i);

System.out.println("课程："+cr.id+":"+cr.name);

}

}

//使用迭代器iterable进行排列

public void testIterator(){

Iterator it =  coursesToSelect.iterator();

//使用iterator的hasNext方法实现循环

System.out.println("有以下可选课程（使用迭代器循环）：");

while(it.hasNext()){

Course cr = (Course)it.next();

System.out.println("课程："+cr.id+":"+cr.name);

}

}

public static void main(String[] args) {

ListText lt1 = new ListText();

lt1.testAdd();

lt1.textGet();

lt1.testIterator();

lt1.testModify();

}

}