[Java] ArrayList를 활용한 성적 평가 예제

ArrayList를 활용한 성적 평가 예제입니다.

ArrayList에 대해선 따로 포스팅 하겠습니다.

package edu.ks.exam2;

import java.util.ArrayList;

import java.util.Scanner;

public class J0502_3 {

private int jumsu1;

private int jumsu2;

private int jumsu3;

private int jumsu4;

private int jumsu5;

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

//1

ArrayList<Student> st = new ArrayList<Student>(); // arrraylist 생성 <객체타입> 동적으로 객체를 생성하기 위해

String ans;

String number;

String name;

int total;

int avr=0;

int i =0;

hakjumc hj = new hakjumc();

J0502_3 a = new J0502_3();

do{

System.out.println("성적을 입력할 학생이 있으면 y 없으면 n을 입력하세요.");

ans = scan.next();

if(ans.equals("n")) break;

//2 Student 클래스의 student 객체 생성

Student student= new Student();

//3 객체에 값을 넣음

System.out.println("학번 : ");

student.setBunho(scan.next());

System.out.println("이름 : ");

student.setName(scan.next());

System.out.println("출석점수 : ");

student.setJumsu1(scan.nextInt());

System.out.println("과제점수 : ");

student.setJumsu2(scan.nextInt());

System.out.println("수시시험 : ");

student.setJumsu3(scan.nextInt());

System.out.println("중간고사 : ");

student.setJumsu4(scan.nextInt());

System.out.println("기말고사 : ");

student.setJumsu5(scan.nextInt());

//4 점수의 합 구하기

total = student.getJumsu1()+student.getJumsu2()+student.getJumsu3()+student.getJumsu4()+student.getJumsu5();

student.setTotal(total);

System.out.println("평균 : "+student.getTotal()/5);

hj.setTotal(student.getTotal()/5);

avr+=student.getTotal()/5;

student.setGrade(hj.hakjum());

System.out.println("학점 : "+student.getGrade());//학점계산 클래스로 호출

st.add(student); // student 객체를 student 객체유형의 ArrayList에 넣음

}while(true);

System.out.println("종료");

System.out.println("****성적 평가표****");

System.out.println("학번  \t이름  \t  평균\t  학점");

for(i=0; i<st.size();i++){

System.out.print(st.get(i).getBunho()+"\t"+st.get(i).getName()+"\t"+st.get(i).getTotal()/5+"\t"+st.get(i).getGrade());

System.out.println();

}

System.out.println("평균점수는 "+(double)(avr/st.size())+"입니다.");

}

}

class hakjumc{

private int total;

private String grade;

public void setTotal(int total){

this.total = total;

}

public String hakjum(){

switch(total/10){

case 10:

case 9:

grade = "A";

break;

case 8:

grade = "B";

break;

case 7:

grade = "C";

break;

case 6:

grade = "D";

break;

default : grade = "F";

}

return grade;

}

}

----------main----------

package edu.ks.exam2;

public class Student {

private String bunho;

private String name;

private int jumsu1;

private int jumsu2;

private int jumsu3;

private int jumsu4;

private int jumsu5;

private int total;

private String grade;

public String getBunho() {

return bunho;

}

public void setBunho(String bunho) {

this.bunho = bunho;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getJumsu1() {

return jumsu1;

}

public void setJumsu1(int jumsu1) {

this.jumsu1 = jumsu1;

}

public int getJumsu2() {

return jumsu2;

}

public void setJumsu2(int jumsu2) {

this.jumsu2 = jumsu2;

}

public int getJumsu3() {

return jumsu3;

}

public void setJumsu3(int jumsu3) {

this.jumsu3 = jumsu3;

}

public int getJumsu4() {

return jumsu4;

}

public void setJumsu4(int jumsu4) {

this.jumsu4 = jumsu4;

}

public int getJumsu5() {

return jumsu5;

}

public void setJumsu5(int jumsu5) {

this.jumsu5 = jumsu5;

}

public int getTotal() {

return total;

}

public void setTotal(int total) {

this.total = total;

}

public String getGrade() {

return grade;

}

public void setGrade(String grade) {

this.grade = grade;

}

}

출력결과는 아래와 같습니다.