還在不？
Student 類
public class Student
{
private int id;
private int age;
private int score;
private String name;
public Student()
{
}
public Student(int id, int age, int score, String name)
{
this.id = id;
this.age = age;
this.score = score;
this.name = name;
}
public int getId()
{
return id;
}
public void setId(int id)
{
this.id = id;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
public int getScore()
{
return score;
}
public void setScore(int score)
{
this.score = score;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
@Override
public String toString()
{
return "學號：" + id + " 姓名：" + name + " 年齡：" + age + " 成績：" + score;
}
}
Manager類
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class Manager
{
private List<Student> list;
public Manager(List<Student> list)
{
this.list = list;
}
public List<Student> getList()
{
return list;
}
public void setList(List<Student> list)
{
this.list = list;
}
//添加學生
public void add(Student s)
{
list.add(s);
}
//根據學生學號返回學生年齡
public int search(int id)
{
for(Iterator<Student> iter = list.iterator(); iter.hasNext();)
{
Student s = iter.next();
if(s.getId() == id)
{
return s.getAge();
}
}
return -1;
}
//刪除學生
public void remove(int id)
{
for(Iterator<Student> iter = list.iterator(); iter.hasNext();)
{
Student s = iter.next();
if(s.getId() == id)
{
list.remove(s);
}
}
}
//計算總成績
public int allScore()
{
int score = 0;
int temp = 0;
for(Iterator<Student> iter = list.iterator(); iter.hasNext();)
{
Student s = iter.next();
temp = s.getScore();
score += temp;
}
return score;
}
//修改成績
public void update(int id)
{
for(Iterator<Student> iter = list.iterator(); iter.hasNext();)
{
Student s = iter.next();
if(s.getId() == id)
{
s.setScore(s.getScore() + 10);
}
}
}
}
測試類 Client
import java.util.ArrayList;
import java.util.List;
public class Client
{
public static void main(String[] args)
{
List<Student> list = new ArrayList<Student>();
Manager manager = new Manager(list);//創建壹個管理者
Student s1 = new Student();//無參構造方法創建的學生實例
//通過方法設置s1的屬性
s1.setId(201105);
s1.setAge(20);
s1.setScore(100);
s1.setName("zhangsan");
Student s2 = new Student(201101,21,98,"lisi");//通過帶參數的構造方法創建實例
Student s3 = new Student(201108,25,95,"zhaoliu");
Student s4 = new Student(201110,23,80,"xiaoming");
Student s5 = new Student(201106,28,78,"hello");
//放到集合當中
manager.getList().add(s1);//添加學生
manager.getList().add(s2);
manager.getList().add(s3);
manager.getList().add(s4);
manager.getList().add(s5);
System.out.println(list);
System.out.println(manager.allScore());
System.out.println(manager.search(201110));//根據學生學號查詢學生年齡
manager.remove(201110);//刪除學生
manager.update(201101);//修改成績
}
}
可以完成妳上述的基本要求，如果改動可以自行修改 很簡單。