[고급자바] Student 과제

package study;
 
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
 
public class StudentTest {
    public static void main(String[] args) {
        
        List<Student> stuList = new ArrayList<Student>();
 
        
        stuList.add(new Student("201500214", "정재현", 95, 80, 90));
        stuList.add(new Student("201600523", "차은우", 95, 95, 100));
        stuList.add(new Student("201200718", "이태민", 70, 75, 80));
        stuList.add(new Student("201000458", "김준면", 65, 95, 90));
        stuList.add(new Student("201100506", "변백현", 75, 90, 85));
        
        ranking(stuList);
        
        System.out.println("정렬 전");
        for(Student stu : stuList) {
            System.out.println(stu);
        }    
        System.out.println("-------------------------------------");
    
    Collections.sort(stuList);
    
    System.out.println("학번의 오름차순으로 정렬 후");
    for(Student stu : stuList) {
        System.out.println(stu);
    }
    System.out.println("-------------------------------------");
    
    
    Collections.sort(stuList, new totalScore());
    System.out.println("총점의 역순으로 정렬");
    
    for(Student stu : stuList) {
        System.out.println(stu);
    }
    System.out.println("-------------------------------------");
    }
 
 
    public static void ranking(List<Student> stuList) {
        for(Student stu : stuList) {
            int rank = 1;
            for(Student stu2 : stuList) {
                if(stu.getTotal() < stu2.getTotal()) {
                    rank++;
                }
            }
            stu.setRank(rank);
        }
        
    }
}
 
 
 
// 학생정보
class Student implements Comparable<Student>{
 
    public Student(String num, String name, int kor, int eng, int mat) {
        super();
        this.num = num;
        this.name = name;
        this.kor = kor;
        this.eng = eng;
        this.mat = mat;
        this.total = kor + eng + mat;
 
    }
 
    private String num;
    private String name;
    private int kor;
    private int eng;
    private int mat;
    private int total;
    private int rank;
    
    public String getNum() {
        return num;
    }
    public void setNum(String num) {
        this.num = num;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getKor() {
        return kor;
    }
    public void setKor(int kor) {
        this.kor = kor;
    }
    public int getEng() {
        return eng;
    }
    public void setEng(int eng) {
        this.eng = eng;
    }
    public int getMat() {
        return mat;
    }
    public void setMat(int mat) {
        this.mat = mat;
    }
    public int getTotal() {
        return total;
    }
    public void setTotal(int total) {
        this.total = total;
    }
    public int getRank() {
        return rank;
    }
    public void setRank(int rank) {
        this.rank = rank;
    }
    
    //학번 오름차순 정렬
    @Override
    public int compareTo(Student stu) {
        return num.compareTo(stu.getNum());
    }
    
    @Override
    public String toString() {
        return "studentInfo [num=" + num + ", name=" + name + ", kor=" + kor + ", eng=" + eng + ", mat=" + mat
                + ", total=" + total + ", rank=" + rank + "]";
    }
}
    
    
    //총점 역순 정렬
class totalScore implements Comparator<Student>{
 
        @Override
        public int compare(Student stu1, Student stu2) {
            if(stu1.getTotal() == stu2.getTotal()) {
                return stu1.getNum().compareTo(stu2.getNum()) * -1;
            } else {
                return Integer.compare(stu1.getTotal(), stu2.getTotal()) * -1;
            }
        }
        
        
        
    }