ArrayList와 Iterator를 이용한 성적관리 프로그램

ArrayList와 Iterator를 이용한 성적관리 프로그램

Z7_sungjuk.java

import java.util.Comparator;

public class Z7_sungjuk implements Comparable<Z7_sungjuk>, Comparator<Z7_sungjuk>{

String name;

int kor;

int eng;

int math;

int total;

double avg;

int highScore;

int lowScore;

public Z7_sungjuk() {}

public Z7_sungjuk(String name, int kor, int eng, int math) {

this.name = name;

this.kor = kor;

this.eng = eng;

this.math = math;

}

public String lastToString() {

return name+"\t"+kor+"\t"+math+"\t"+eng+"\t"+total+"\t"+avg+"\t"+highScore+"\t"+lowScore;

}

@Override

public int compare(Z7_sungjuk stu1, Z7_sungjuk stu2) {

// TODO Auto-generated method stub

return stu1.total - stu2.total;

}

@Override

public int compareTo(Z7_sungjuk stu) {

// TODO Auto-generated method stub

return name.compareTo(stu.name);

}

public void calc() {

this.total = kor+eng+math;

this.avg = (double)total/3;

highScore = lowScore = kor;

if(highScore < eng)

highScore = eng;

if(highScore < math)

highScore = math;

if(lowScore > eng)

lowScore = eng;

if(lowScore > math)

lowScore = math;

}

}

Z7_sungjukMenu.java

import java.util.ArrayList;

import java.util.Iterator;

import java.util.Scanner;

//입력, 삭제, 편집, 조회, 종료

public class Z7_sungjukMenu {

static ArrayList<Z7_sungjuk> student = new ArrayList<Z7_sungjuk>();

static Scanner sc = new Scanner(System.in);

String name;

int kor;

int math;

int eng;

int total;

double avg;

public void write() {

Z7_sungjuk st = new Z7_sungjuk();

System.out.println("이름을 입력하세요.");

name = sc.next();

System.out.println("국어점수를 입력하세요.");

kor = sc.nextInt();

System.out.println("수학점수를 입력하세요.");

math = sc.nextInt();

System.out.println("영어점수를 입력하세요.");

eng = sc.nextInt();

sc.nextLine();

st.name = name;

st.kor = kor;

st.math = math;

st.eng = eng;

student.add(st);

}

public void print() {

Iterator<Z7_sungjuk> itr = student.iterator();

System.out.println("이름\t국어\t수학\t영어\t총점\t평균\t최고점수\t최소점수");

while (itr.hasNext()) {

Z7_sungjuk str = (Z7_sungjuk) itr.next();

str.calc();

System.out.println(str.lastToString());

}

}

public void edit() {

System.out.println("이름을 입력해주세요.");

String tmpName = sc.next();

Iterator<Z7_sungjuk> itr = student.iterator();

while (itr.hasNext()) {

Z7_sungjuk str = (Z7_sungjuk) itr.next();

if (str.name.equals(tmpName)) {

System.out.println("편집하고 싶은 것을 선택하세요.");

System.out.println("1.국어    2.영어    3.수학");

int num1 = sc.nextInt();

System.out.print("점수를 입력해주세요.");

int sco = sc.nextInt();

if (num1 == 1)

str.kor = sco;

else if (num1 == 2)

str.eng = sco;

else if (num1 == 3)

str.math = sco;

else

System.out.println("잘못 입력하셨습니다.");

}

}

}

public void remove() {

System.out.println("이름을 입력해주세요.");

String tmpName = sc.next();

Iterator<Z7_sungjuk> itr = student.iterator();

while (itr.hasNext()) {

Z7_sungjuk str = (Z7_sungjuk) itr.next();

if (str.name.equals(tmpName)) {

itr.remove();

}

}

}

}

Z7_sungjukMain.java

import java.util.Scanner;

//입력, 삭제, 편집, 조회, 정렬, 종료

public class Z7_sungjukMain {

public static void main(String[] args) {

Z7_sungjukMenu menu = new Z7_sungjukMenu();

while (true) {

Scanner sc = new Scanner(System.in);

System.out.println("숫자를 입력하세요: 1.입력    2.조회    3.편집    4.삭제    0.종료");

int num = sc.nextInt();

if (num == 1)

menu.write();

else if (num == 2)

menu.print();

else if (num == 3)

menu.edit();

else if (num == 4)

menu.remove();

else if (num == 0) {

System.out.println("=================프로그램종료=====================");

break;

}

else {

System.out.println("잘못 입력하셨습니다.");

}

}

}

}