fuction.java

JAVA学生考试成绩分析程序

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package studentscore;

import java.util.*;

/**
 *
 * 基本数据处理类
 * @author Conupe Fox
 */
public class Fuction {

    /**查找方法*/
    public static boolean find(ArrayList<Classes> al, Classes c){
        Iterator it = al.iterator();
        while(it.hasNext()){
            Classes cs = (Classes)it.next();
            if(cs.equels(c))
                return true;
        }
        return false;
    }
    public static boolean find(ArrayList<Lesson> al, Lesson l){
        Iterator it = al.iterator();
        while(it.hasNext()){
            Lesson ls = (Lesson)it.next();
            if(ls.equals(l))
                return true;
        }
        return false;
    }
    //未使用
    public static boolean find(ArrayList<Classes> al, Student st){
        Iterator itClass = al.iterator();
        while(itClass.hasNext()){
            Classes cs = (Classes)itClass.next();
            Iterator itStu = cs.getStudentList().iterator();
            while(itStu.hasNext()){
                Student stu = (Student)itStu.next();
                if(stu.equals(st))
                    return true;
            }
        }
        return false;
    }
  
     //按学号查找
    public static Student find(ArrayList<Classes> al, long id){
        Iterator itClass = al.iterator();
        while(itClass.hasNext()){
            Classes cs = (Classes)itClass.next();
            Iterator itStu = cs.getStudentList().iterator();
            while(itStu.hasNext()){
                Student stu = (Student)itStu.next();
                if(stu.getId() == id)
                    return stu;
            }
        }
        return null;
    }
    //获取班级
    public static Classes getClasses(ArrayList<Classes> al, Student st){
        Iterator itClass = al.iterator();
        while(itClass.hasNext()){
            Classes cs = (Classes)itClass.next();
            Iterator itStu = cs.getStudentList().iterator();
            while(itStu.hasNext()){
                Student stu = (Student)itStu.next();
                if(stu.equals(st))
                    return cs;
            }
        }
        return null;
    }
    
    //获取课程
    public static Lesson getLesson(Student stu, Lesson l){
        Iterator itLesson = stu.getLesson().iterator();
        while(itLesson.hasNext()){
            Lesson lesson = (Lesson)itLesson.next();
            if(lesson.equals(l)){
                return lesson;
            }
        }
        return null;    
    }
    
    
    /**新增方法*/
    public static boolean add(ArrayList<Classes> al, Classes c){
        if(find(al,c)){
            return false;
        }
        else{
            al.add(c);
            return true;
        }
    }
    public static boolean add(ArrayList<Lesson> al, Lesson l){
        if(find(al,l)){
            return false;
        }
        else{
            al.add(l);
            return true;
        }
    }
    //未使用
    public static boolean add(ArrayList<Classes> al, Classes c, Student st){
        if(find(al,st)){
            return false;
        }
        else{
            c.addStudent(st);
            return true;
        }
    }
    
    /** 移除方法 */
    //移除班级
    public static void remove(ArrayList<Classes> al, Classes c){
       al.remove(c);
    }
    //移除课程
    public static void remove(ArrayList<Classes> alClass, ArrayList<Lesson> alLesson, Lesson l){
        alLesson.remove(l);
        //遍历所有学生课程
        Iterator itClass = alClass.iterator();
        while(itClass.hasNext()){
            Classes cs = (Classes)itClass.next();
            Iterator itStu = cs.getStudentList().iterator();
            while(itStu.hasNext()){
                Student stu = (Student)itStu.next();
                Iterator itLesson = stu.getLesson().iterator();
                while(itLesson.hasNext()){
                    Lesson ls = (Lesson)itLesson.next();
                    if(ls.equals(l)){
                        itLesson.remove();
                        break;
                    }
                }
            }
        }
    }
    //移除学生(未使用)
    public static void remove(ArrayList<Classes> al, Classes c, Student st){
        c.removeStudent(st);
    }
    
    public static boolean modify(ArrayList<Classes> alClass, ArrayList<Lesson> alLesson, Lesson l, Lesson lNew){
        //修改课程列表中的课程信息
        l.setName(lNew.getName());
        l.setId(lNew.getId());
        l.setHours(lNew.getHours());
        l.setPoints(lNew.getPoints());
        //遍历所有学生课程
        Iterator itClass = alClass.iterator();
        while(itClass.hasNext()){
            Classes cs = (Classes)itClass.next();
            Iterator itStu = cs.getStudentList().iterator();
            while(itStu.hasNext()){
                Student stu = (Student)itStu.next();
                Lesson ls = Fuction.getLesson(stu, l);
                if(ls != null){
                    //修改学生课程列表中的信息
                    ls.setHours(lNew.getHours());
                    ls.setId(lNew.getId());
                    ls.setName(lNew.getName());
                    ls.setPoints(lNew.getPoints());
                }
            }
        }
        return true;
   }
    
    
    
}