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JAVA

221228_SingleTon

by 경 훈 2022. 12. 28.

싱글턴(SingleTon) : 객체를 1개 생성하여 공유 -> static 

 

 

package day18_SingleTon2;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.text.DecimalFormat;

public class ReportDAO {
	private SingleTon ston;
	public ReportDAO() {
		ston = SingleTon.korea();
	}
	public void insert() throws FileNotFoundException {	
		FileReader fr = new FileReader("c:/data/12281.txt");
		BufferedReader br = new BufferedReader(fr);
		while(true) {
			try {
				ReportDTO dto = new ReportDTO();
				String str = br.readLine();
				if(str==null) break; //자료가없으면
				String name = str.substring(0,3);
				int kor = Integer.parseInt(str.substring(3, 6));
				int eng = Integer.parseInt(str.substring(6, 9));
				int mat = Integer.parseInt(str.substring(9, 12));
				int tot = kor+eng+mat;
				double avg = (double)tot/3;
				char hak;
				if(avg>=90) hak='A';
				else if(avg>=80) hak='B';
				else if(avg>=70) hak='C';
				else if(avg>=60) hak='D';
				else hak='F';
				dto.setName(name);
				dto.setKor(kor);
				dto.setEng(eng);
				dto.setMat(mat);
				dto.setTot(tot);
				dto.setAvg(avg);
				dto.setHak(hak);
				ston.addin(dto);
			}
			catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	public void out() {
		DecimalFormat df = new DecimalFormat("#,#00.00");
		System.out.println("이름\t국어\t영어\t수학\t총점\t평균\t학점");
		System.out.print("==========================");
		System.out.println("==========================");
		for(ReportDTO aa:ston.out2()) {
			System.out.print(aa.getName()+"\t");
			System.out.print(aa.getKor()+"\t");
			System.out.print(aa.getEng()+"\t");
			System.out.print(aa.getMat()+"\t");
			System.out.print(aa.getTot()+"\t");
			System.out.print(df.format(aa.getAvg())+"\t");
			System.out.println(aa.getHak()+"\t");
		}
	}
}

 

package day18_SingleTon2;

import java.util.ArrayList;

public class SingleTon {
	private static SingleTon ston;
	ArrayList<ReportDTO> list = new ArrayList<ReportDTO>();
	//ston 객체를 공유..메소드를 호출하면 반환
	public static SingleTon korea() {
		if(ston==null)
			ston = new SingleTon();
		return ston;
	}
	//자료추가 메소드
	public void addin(ReportDTO dto) {
		list.add(dto);
	}
	//출력기능
	public ArrayList<ReportDTO> out2() {
		return list;
	}
}
package day18_SingleTon2;

public class DTOtest {
	String id,phone,address;

	public DTOtest() {}
	public DTOtest(String id, String phone, String address) {
		super();
		this.id = id;
		this.phone = phone;
		this.address = address;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
}

 

package day18_SingleTon2;

import java.io.FileNotFoundException;
import java.util.InputMismatchException;
import java.util.Scanner;

public class Maintest {

	public static void main(String[] args) throws FileNotFoundException {
		Scanner sc = new Scanner(System.in);
		DAOtest dao = new DAOtest();
		while(true) {
			System.out.println("[1]데이터입력");
			System.out.println("[2]데이터출력");
			System.out.println("[0]종료");
			System.out.print("원하는 작업번호 입력");
			String qq = sc.next();
			try {
				int n = Integer.parseInt(qq);
				switch (n) {
				case 0:System.exit(0);break;
				case 1:dao.insert();break;
				case 2:dao.out();break;
				}
			}
			catch(InputMismatchException e) {
				System.out.println("★작업번호에 문자열 입력오류★");
			}
			catch(NumberFormatException e) {
				System.out.println("★작업번호에 문자열 입력오류★");
			}
		}
	}
}

 

package day18_SingleTon2;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;

public class DAOtest {
	private SingleTontest ston;
	public DAOtest() {
		ston = SingleTontest.gogo();
	}
	public void insert() throws FileNotFoundException {
		FileReader fr = new FileReader("c:/data/12282.txt");
		BufferedReader br = new BufferedReader(fr);
		while(true) {
			try {
				DTOtest dto = new DTOtest();
				String str = br.readLine();
				if(str==null) break;
				dto.setId(str.substring(0, 5));
				dto.setPhone(str.substring(5, 18));
				dto.setAddress(str.substring(18));
				ston.addin(dto);
			}
			catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	public void out() {
		System.out.println("아이디\t전화번호\t\t주소");
		System.out.print("=====================");
		System.out.println("===================");
		for(DTOtest aa:ston.out()) {
			System.out.print(aa.getId()+"\t");
			System.out.print(aa.getPhone()+"\t");
			System.out.println(aa.getAddress()+"\t");
		}
	}
}

 

package day18_SingleTon2;

import java.util.ArrayList;

public class SingleTontest {
	private static SingleTontest ston;
	ArrayList<DTOtest> list = new ArrayList<DTOtest>();
	public static SingleTontest gogo() {
		if (ston==null)
			ston = new SingleTontest();
		return ston;
	}
	public void addin(DTOtest dto) {
		list.add(dto);
	}
	public ArrayList<DTOtest> out() {
		return list;
	}
}
package day18_ClassTest;
class Father {
	String name;
	int money;
	public Father(String name, int money) {
		this.name = name;
		this.money = money;
	}
}
class Son extends Father{
	String name;
	int money;
	public Son(String name, int money, String name2, int money2) {
		super(name, money);//상속받은 클래스 생성자를 호출..값을 넘겨줌
		this.name = name2;
		this.money = money2;
	}
	public void out() {
		System.out.println("아버지 이름 : "+super.name);
		System.out.println("아버지 돈 : "+super.money);
		System.out.println("아들 이름 : "+this.name);
		System.out.println("아들 돈 : "+this.money);
	}
}
public class Sample {
	public static void main(String[] args) {
		Son ss = new Son("홍길동",10000,"홍기남",5000);
		ss.out();
	}
}

 

package day18_ClassTest;
class Jubon {
	String name,jumin,address;

	public Jubon(String name, String jumin, String address) {
		super();
		this.name = name;
		this.jumin = jumin;
		this.address = address;
	}
}
class School extends Jubon{
	String hakbun;
	int kor,eng,mat;
	public School(String name, String jumin, String address, String hakbun, int kor, int eng, int mat) {
		super(name, jumin, address);
		this.hakbun = hakbun;
		this.kor = kor;
		this.eng = eng;
		this.mat = mat;
	}
	public void out() {
		System.out.println("이름 : "+super.name);
		System.out.println("주민번호 : "+super.jumin);
		System.out.println("주소 : "+super.address);
		System.out.println("학번 : "+this.hakbun);
		System.out.println("국어 : "+this.kor);
		System.out.println("영어 : "+this.eng);
		System.out.println("수학 : "+this.mat);
	}
}
public class Sample2 {
	public static void main(String[] args) {
		School sh = new School("홍길동", "950101-1111222", "수원시 팔달구", "22-1234567", 80, 85, 100);
		sh.out();
	}
}
package day18_FileConstructor;
class Jumin {
	String name,juminsumber,address;
	public Jumin(String name, String juminsumber, String address) {
		super();
		this.name = name;
		this.juminsumber = juminsumber;
		this.address = address;
	}
}
public class SchoolDTO extends Jumin{
	String bun;
	int kor,eng,mat;
	public SchoolDTO(String name, String juminsumber, String address, String bun, int kor, int eng, int mat) {
		super(name, juminsumber, address);
		this.bun = bun;
		this.kor = kor;
		this.eng = eng;
		this.mat = mat;
	}
}

 

package day18_FileConstructor;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;

public class SchoolDAO {
	ArrayList<SchoolDTO> list = new ArrayList<SchoolDTO>();
	public void insert() throws FileNotFoundException {
		FileReader fr = new FileReader("c:/data/12283.txt");
		BufferedReader br = new BufferedReader(fr);
		while(true) {
			try {
				String str = br.readLine();
				if(str==null)break;
				String name = str.substring(0, 3);
				String junum = str.substring(3, 17);
				String address = str.substring(17, 23);
				String bun = str.substring(23, 30);
				int kor = Integer.parseInt(str.substring(30, 33));
				int eng = Integer.parseInt(str.substring(33, 36));
				int mat = Integer.parseInt(str.substring(36, 39));
				list.add(new SchoolDTO(name, junum, address, bun, kor, eng, mat));
			}
			catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	public void out() {
		System.out.println("이름\t주민번호\t\t주소\t\t학번\t국어\t영어\t수학");
		System.out.print("==================================");
		System.out.println("==================================");
		for(SchoolDTO a:list) {
			System.out.print(a.name+"\t");
			System.out.print(a.juminsumber+"\t");
			System.out.print(a.address+"\t");
			System.out.print(a.bun+"\t");
			System.out.print(a.kor+"\t");
			System.out.print(a.eng+"\t");
			System.out.println(a.mat);
		}
	}
}

 

package day18_FileConstructor;

import java.io.FileNotFoundException;
import java.util.InputMismatchException;
import java.util.Scanner;

public class Schoolmenu {

	public static void main(String[] args) throws FileNotFoundException {
		Scanner sc = new Scanner(System.in);
		SchoolDAO dao = new SchoolDAO();
		while(true) {
			System.out.println("[1]데이터입력");
			System.out.println("[2]데이터출력");
			System.out.println("[0]종료");
			System.out.print("원하는 작업번호 입력");
			String qq = sc.next();
			try {
				int n = Integer.parseInt(qq);
				switch (n) {
				case 0:System.exit(0);break;
				case 1:dao.insert();break;
				case 2:dao.out();break;
				}
			}
			catch(InputMismatchException e) {
				System.out.println("★작업번호에 문자열 입력오류★");
			}
			catch(NumberFormatException e) {
				System.out.println("★작업번호에 문자열 입력오류★");
			}
		}
	}
}
package day18_FileConstructor;

import java.text.DecimalFormat;

public class Nansu {

	public static void main(String[] args) {
		DecimalFormat df = new DecimalFormat("#,##0");
		int a=0;
		int b=0;
		int c=0;
		int d=0;
		int e=0;
		int f=0;
		int p=1000000000;
		for(int i=1;i<=p;i++) {
			int n = (int)(Math.random()*6)+1;
			if(n==1) a++;
			else if(n==2) b++;
			else if(n==3) c++;
			else if(n==4) d++;
			else if(n==5) e++;
			else if(n==6) f++;
		}
		System.out.println(df.format(p)+"번 돌릴경우");
		System.out.println("1의 경우의수 : "+df.format(a)+"번");
		System.out.println("2의 경우의수 : "+df.format(b)+"번");
		System.out.println("3의 경우의수 : "+df.format(c)+"번");
		System.out.println("4의 경우의수 : "+df.format(d)+"번");
		System.out.println("5의 경우의수 : "+df.format(e)+"번");
		System.out.println("6의 경우의수 : "+df.format(f)+"번");
	}
}

 

package day18_FileConstructor;

public class Nansu {

	public static void main(String[] args) {
		
		int [] a = new int [6];
		int su = 6000000;
		for(int i=1;i<=su;i++) {
			int n = (int)(Math.random()*6+1);
			a[n-1]++;
		}
		for(int i=0;i<=5;i++) {
			System.out.println((i)+"이 나온횟수"+a[i]+"\t\t"+(double)a[i]/su*100+"%");
		}
	}
}

 

package day18_FileConstructor;

import java.util.Random;

public class Nansu {

	public static void main(String[] args) {
		Random rd = new Random();
		int [] a = new int [6];
		int su = 6000000;
		for(int i=1;i<=su;i++) {
			int n = (int)rd.nextInt(6)+1;
			a[n-1]++;
		}
		for(int i=0;i<=5;i++) {
			System.out.println((i)+"이 나온횟수"+a[i]+"\t\t"+(double)a[i]/su*100+"%");
		}
	}
}

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