221216_Class

생성자 : Constructor

목적 : 전역변수에게 자료를 처음으로 전달 (객체 초기화)

특징

이름은 클래스와 동일하고 ()가 존재

메서드의 일종이므로 인수와 매개변수의 타입과 갯수가 반드시 같아야함

...() => default constructor(디폴트 생성자)

package day10_Method2;

import java.text.DecimalFormat;

public class ScoreTest2 {
	String name;
	int kor,eng,math;
	int tot;
	double avg;
	char hak;
	public void out() {
		DecimalFormat df = new DecimalFormat("#,#00.00");
		System.out.println("이름 : "+name);
		System.out.println("국어 : "+kor);
		System.out.println("영어 : "+eng);
		System.out.println("수학 : "+math);
		System.out.println("총점 : "+tot);
		System.out.println("평균 : "+df.format(avg));
		System.out.println("학점 : "+hak(avg));
	}
	char hak(double avg) {
		switch ((int)avg/10) {
		case 10:
		case 9:hak='A';break;
		case 8:hak='B';break;
		case 7:hak='C';break;
		case 6:hak='D';break;
		default:hak='F';break;
		}
		return hak;
	}
	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 getMath() {
		return math;
	}
	public void setMath(int math) {
		this.math = math;
	}
	public int getTot() {
		return tot;
	}
	public void setTot(int tot) {
		this.tot = tot;
	}
	public double getAvg() {
		return avg;
	}
	public void setAvg(double avg) {
		this.avg = avg;
	}
	public char getHak() {
		return hak;
	}
	public void setHak(char hak) {
		this.hak = hak;
	}
}

 

package day10_Method2;

import java.util.Scanner;

public class Main_Test {

	public static void main(String[] args) {
		ScoreTest2 st = new ScoreTest2();
		//1 직접입력
//		st.setName("홍길동");
//		st.setKor(80);
//		st.setEng(99);
//		st.setMath(75);
		//2 키보드 입력
		Scanner sc = new Scanner(System.in);
		st.setName(name(sc));
		st.setKor(kor(sc));
		st.setEng(eng(sc));
		st.setMath(math(sc));
		
		st.setTot(st.getKor()+st.getEng()+st.getMath());
		st.setAvg((double)st.getTot()/3);
		st.setHak(st.hak(st.getAvg()));
		st.out();
	}
	private static String name(Scanner sc) {
		System.out.print("이름을 입력");
		return sc.next();
	}
	private static int kor(Scanner sc) {
		System.out.print("국어점수 입력");
		return sc.nextInt();
	}
	private static int eng(Scanner sc) {
		System.out.print("영어점수 입력");
		return sc.nextInt();
	}
	private static int math(Scanner sc) {
		System.out.print("수학점수 입력");
		return sc.nextInt();
	}	
}

 

package day10_Method2;

import java.util.Scanner;

public class Input {
	public String munja(String str,Scanner sc) {
		System.out.print(str+"를 입력하시오");
		return sc.next();
	}
	public int number(String str,Scanner sc) {
		System.out.print(str+"를 입력하시오");
		return sc.nextInt();
	}
}

 

package day10_Method2;

import java.util.Scanner;

public class Main_Test {

	public static void main(String[] args) {
		ScoreTest2 st = new ScoreTest2();
		Input in =new Input();
		Scanner sc = new Scanner(System.in);
		
		st.setName(in.munja("이름", sc));
		st.setKor(in.number("국어", sc));
		st.setEng(in.number("영어", sc));
		st.setMath(in.number("수학", sc));
		
		st.setTot(st.getKor()+st.getEng()+st.getMath());
		st.setAvg((double)st.getTot()/3);
		st.setHak(st.hak(st.getAvg()));
		st.out();
	}
}

 

package day10_Method2;

public class Process { //처리 클래스 값을 구하는 총점 평균 학점
	//1총점
	public int tot(int kor,int eng,int math) {//국어,영어,수학을 넘겨받
		
		return (kor+eng+math);
	}
	//2평균
	public double avg(int tot) {
		return (double)tot/3;
	}
	//3학점
	public char hak(double avg) {
		char hak;
		switch ((int)avg/10) {
		case 10:
		case 9:hak='A';break;
		case 8:hak='B';break;
		case 7:hak='C';break;
		case 6:hak='D';break;
		default:hak='F';break;
		}
		return hak;
	}
}

 

package day10_Method2;

import java.util.Scanner;

public class Main_Test {

	public static void main(String[] args) {
		ScoreTest2 st = new ScoreTest2();
		Input in =new Input();
		Scanner sc = new Scanner(System.in);
		Process pp = new Process();
		
		st.setName(in.munja("이름", sc));
		st.setKor(in.number("국어", sc));
		st.setEng(in.number("영어", sc));
		st.setMath(in.number("수학", sc));
		
		st.setTot(pp.tot(st.getKor(),st.getEng(),st.getMath()));
		st.setAvg(pp.avg(st.getTot()));
		st.setHak(pp.hak(st.getAvg()));
		st.out();
	}
}

 

import java.text.DecimalFormat;

public class ScoreTest {
	String name;
	int kor,eng,math;
	int tot;
	double avg;
	char grade;
	
	public void out() {
		DecimalFormat df = new DecimalFormat("#,#00.00");
		System.out.println("이름 : "+name);
		System.out.println("국어 : "+kor);
		System.out.println("영어 : "+eng);
		System.out.println("수학 : "+math);
		System.out.println("총점 : "+tot);
		System.out.println("평균 : "+df.format(avg));
		System.out.println("학점 : "+grade(avg));
	}
	char grade(double avg) {
		switch ((int)avg/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';break;
		}
		return grade;
	}
	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 getMath() {
		return math;
	}
	public void setMath(int math) {
		this.math = math;
	}
	public int getTot() {
		return tot;
	}
	public void setTot(int tot) {
		this.tot = tot;
	}
	public double getAvg() {
		return avg;
	}
	public void setAvg(double avg) {
		this.avg = avg;
	}
	public char getGrade() {
		return grade;
	}
	public void setGrade(char grade) {
		this.grade = grade;
	}
}

 

import java.util.Scanner;

public class Input {
	public String munja(String str,Scanner sc) {
		System.out.println(str+"을 입력하시오");
		return sc.next();
	}
	public int number(String str,Scanner sc) {
		System.out.println(str+"점수를 입력하시오");
		return sc.nextInt();
	}
}

 

public class Process {
	public int tot(int kor,int eng,int math) {
		return (kor+eng+math);
	}
	public double avg(int tot) {
		return (double)tot/3;
	}
	public char grade(double avg) {
		char grade;
		switch ((int)avg/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';break;
		}
		return grade;
	}
}

 

import java.util.Scanner;

public class MainTest {

	public static void main(String[] args) {
		ScoreTest st = new ScoreTest();
		Input ip = new Input();
		Scanner sc = new Scanner(System.in);
		Process pc = new Process();
		st.setName(ip.munja("이름", sc));
		st.setKor(ip.number("국어", sc));
		st.setEng(ip.number("영어", sc));
		st.setMath(ip.number("수학", sc));
		st.setTot(pc.tot(st.getKor(),st.getEng(),st.getMath()));
		st.setAvg(pc.avg(st.getTot()));
		st.setGrade(pc.grade(st.getAvg()));
		st.out();
	}
}

---

package day10_Sample;

public class Class1 {
	//이름,전화번호,나이,주소를 입력해서 출력
	String name,phone,add;
	int age;
	public void out() {
		System.out.println("이름 : "+name);
		System.out.println("전화번호 : "+phone);
		System.out.println("나이 : "+age);
		System.out.println("주소 : "+add);
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	public String getAdd() {
		return add;
	}
	public void setAdd(String add) {
		this.add = add;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
}

 

package day10_Sample;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Class1 cc = new Class1();
		Scanner sc = new Scanner(System.in);
		Input in  = new Input();
		cc.setName(in.munja("이름", sc));
		cc.setPhone(in.munja("전화번호", sc));
		cc.setAge(in.number("나이", sc));
		sc.nextLine();
		cc.setAdd(in.munja("주소", sc));
		cc.out();
	}
}

---

package day10_Sample2;

public class Class1 {
	//두수를 입력하여 합을 구하는 클래스 생성
	int a,b;
	public void out() {
		System.out.println(a+"와 "+b+"의 합 : "+(a+b));
	}
	public Class1(int a, int b) {
		super();
		this.a = a;
		this.b = b;
	}
	public int getA() {
		return a;
	}
	public void setA(int a) {
		this.a = a;
	}
	public int getB() {
		return b;
	}
	public void setB(int b) {
		this.b = b;
	}
	
}

 

package day10_Sample2;

import java.util.Scanner;

public class Input {
	public String munja(String str,Scanner sc) {
		System.out.print(str+"를 입력");
		return sc.nextLine();
	}
	public int number(String str,Scanner sc) {
		System.out.print(str+"를 입력");
		return sc.nextInt();
	}

}

 

package day10_Sample2;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Class1 cl = new Class1(10, 50);
		Input in = new Input();
		Scanner sc = new Scanner(System.in);
		cl.setA(in.number("숫자 A", sc));
		cl.setB(in.number("숫자 B", sc));
		cl.out();
	}
}

---

package day10_Sample3;

import java.text.DecimalFormat;

public class Class2 {
	//수험번호 이름 국어 영어 수학 과학->총점 평균 학점 결과
	//결과는 국어,영어,수학,과학이 모두 40이상이면서 평균이 60이상이면 "합격" 아니면 "불합격"
	String su;
	String name;
	int kor,eng,math,sc;
	int tot;
	double avg;
	char grade;
	String fi;
	
	public void out() {
		DecimalFormat df = new DecimalFormat("#,#00.00");
		System.out.println("수험번호 : "+su);
		System.out.println("이름 : "+name);
		System.out.println("국어 : "+kor);
		System.out.println("영어 : "+eng);
		System.out.println("수학 : "+math);
		System.out.println("과학 : "+sc);
		System.out.println("총점 : "+tot);
		System.out.println("평균 : "+df.format(avg));
		System.out.println("학점 : "+grade);
		System.out.println("결과 : "+fi);
	}
	public String getSu() {
		return su;
	}
	public void setSu(String su) {
		this.su = su;
	}
	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 getMath() {
		return math;
	}
	public void setMath(int math) {
		this.math = math;
	}
	public int getSc() {
		return sc;
	}
	public void setSc(int sc) {
		this.sc = sc;
	}
	public int getTot() {
		return tot;
	}
	public void setTot(int tot) {
		this.tot = tot;
	}
	public double getAvg() {
		return avg;
	}
	public void setAvg(double avg) {
		this.avg = avg;
	}
	public char getGrade() {
		return grade;
	}
	public void setGrade(char grade) {
		this.grade = grade;
	}
	public String getFi() {
		return fi;
	}
	public void setFi(String fi) {
		this.fi = fi;
	}
}

 

package day10_Sample3;

import java.util.Scanner;

public class Input {
	public String munja(String str,Scanner sc) {
		System.out.println(str+"를 입력");
		return sc.nextLine();
	}
	public int number(String str,Scanner sc) {
		System.out.println(str+"를 입력");
		return sc.nextInt();
	}
}

 

package day10_Sample3;

public class Process {
	public int tot(int kor,int eng,int math,int sc) {
		return (kor+eng+math+sc);
	}
	public double avg(int tot) {
		return (double)tot/4;
	}
	public char grade(double avg) {
		char grade;
		switch ((int)avg/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';break;
		}
		return grade;
	}
	public String fi(int kor,int eng,int math,int sc,double avg) {
		String fi;
		if(kor>=40&&eng>=40&&math>=40&&sc>=40&&avg>=60) {
			fi = "합격";
		}
		else
		{
			fi = "불합격";
		}
		return fi;
	}
}

 

package day10_Sample3;

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		//수험번호 이름 국어 영어 수학 과학->총점 평균 학점 결과
		//결과는 국어,영어,수학,과학이 모두 40이상이면서 평균이 60이상이면 "합격" 아니면 "불합격"
		Class2 cc = new Class2();
		Input in = new Input();
		Scanner sc = new Scanner(System.in);
		Process pr = new Process();
		cc.setSu(in.munja("수험번호", sc));
		cc.setName(in.munja("이름", sc));
		cc.setKor(in.number("국어", sc));
		cc.setEng(in.number("영어", sc));
		cc.setMath(in.number("수학", sc));
		cc.setSc(in.number("과학", sc));
		cc.setTot(pr.tot(cc.getKor(), cc.getEng(), cc.getMath(), cc.getSc()));
		cc.setAvg(pr.avg(cc.getTot()));
		cc.setGrade(pr.grade(cc.getAvg()));
		cc.setFi(pr.fi(cc.getKor(), cc.getEng(), cc.getMath(), cc.getSc(), cc.getAvg()));
		cc.out();
	}
}

---