JOIN

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Join extends JFrame implements ActionListener{

	private JTextField tfid;
	private JTextField tid;
	private JTextField tpw;
	private JTextField tn;
	private JTextField tr;
	
	
	public Join() {
		
		
		JPanel p=new JPanel();

		//무슨 항목인지 출력
		JLabel lfid = new JLabel("고유번호");
		JLabel lid = new JLabel("아이디");
		JLabel lpw = new JLabel("비밀번호");
		JLabel ln=new JLabel("이름");
		JLabel lr=new JLabel("가족관계");
		
		//중복확인 버튼
		JButton a1=new JButton("가족 고유번호 중복체크");
		JButton a2=new JButton("아이디 중복체크");
		
		//각 항목별로 텍스트창 만들기
		tfid=new JTextField();		
		tid=new JTextField();
		tpw=new JTextField();
		tn=new JTextField();
		tr=new JTextField();
		
		//화면에 표현
		add(lfid);
		add(tfid);
		add(a1);
		add(lid);
		add(tid);
		add(a2);
		add(lpw);
		add(tpw);
		add(ln);
		add(tn);
		add(lr);
		add(tr);
		
		//버튼 생성 및 화면에 표현
		
		JButton j1=new JButton("저장");
		JButton j2=new JButton("취소");
		add(j1);
		add(j2);		
		
		
		//항목별로 위치 지정
		lfid.setBounds(40, 30,80, 40);
		lid.setBounds(40, 70, 80, 40);
		lpw.setBounds(40, 110, 80, 40);
		ln.setBounds(40, 150, 80, 40);
		lr.setBounds(40, 190, 80, 40);
		
        tfid.setBounds(120, 30, 150, 40);        
		tid.setBounds(120, 70, 150, 40);		
        tpw.setBounds(120, 110, 150, 40);		
        tn.setBounds(120, 150, 150, 40);
        tr.setBounds(120, 190, 150, 40);
        
		a1.setBounds(300, 30, 200, 40);
		a2.setBounds(300, 70, 200, 40);
		
		j1.setBounds(160, 330, 80, 30);
        j2.setBounds(290, 330, 80, 30);
		
        
        //버튼 눌렀을때 실행되도록
        a1.addActionListener(this);
        a2.addActionListener(this);
		j1.addActionListener(this);
		j2.addActionListener(this);

		
		//전체 모습 화면에 표현
		add(p);
		setSize(550,500);
		setTitle("회원가입 창");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}
	
	public void actionPerformed(ActionEvent e) {
		try {
			String buttonString=e.getActionCommand();
			int count1=0;
			int number1;
			//고유 번호 중복 체크하기
			if (buttonString.equals("가족 고유번호 중복체크")) {
				Scanner in=new Scanner(new FileInputStream("FID.txt"));

				while(in.hasNextInt()) {
					number1=in.nextInt();
					if (number1==(stringToInt(tfid.getText()))) {
						count1=0;
						break;
					}
					else {
						count1=1;
					}
				}
				
				in.close();
				if (count1==0) {
						JOptionPane.showMessageDialog(null, "고유번호가 확인되었습니다");	
				}
				else if (count1==1) {
						JOptionPane.showMessageDialog(null, "없는 고유번호입니다.");	
				}	
			}
			//아이디 중복 체크하기
			else if (buttonString.equals("아이디 중복체크")) {

				Scanner input = new Scanner(new FileReader("ID.txt"));
				BufferedWriter output =
						new BufferedWriter(new FileWriter("ID.txt", true));

				int count2=0;
				
				while(input.hasNext()) {
					String str=input.next();
					if (str.equals(tid.getText())) {
						count2=1;
						break;
					}
					else {
						count2=0;				
					}
				}
				
				input.close();
				
				if (count2==1) {
					JOptionPane.showMessageDialog(null, "중복된 아이디입니다");	
				}
				else {
					JOptionPane.showMessageDialog(null, "사용 가능한 아이디입니다");
					output.write(tid.getText()+" ");
					output.write("\r\n");
					output.close();
				}
			}
			//저장 버튼 누르면 텍스트파일에 입력
			else if (buttonString.equals("저장")) {
				BufferedWriter outputStream=
						new BufferedWriter(new FileWriter("JoinMembership.txt",true));
				outputStream.write(tfid.getText()+" ");
				outputStream.write(tid.getText() + " ");
				outputStream.write(tpw.getText() + " ");
				outputStream.write(tn.getText() + " ");
				outputStream.write(tr.getText() + " ");
				//한명당 엔터키
				outputStream.write("\r\n");
				outputStream.close();
				JOptionPane.showMessageDialog(null, "회원가입을 성공하였습니다!");
				}
			//취소버튼 누르면 그냥 회원가입 취소
			else if (buttonString.equals("취소")) {				
				JOptionPane.showMessageDialog(null, "회원가입에 실패하였습니다.");
			}
			//예외처리
			else
				System.out.println("Unexpected error");
		} catch (IOException e1) {
			JOptionPane.showMessageDialog(null, "회원가입에 실패하였습니다.");

		}
		
	
	}
	private static int stringToInt(String text) {
		return Integer.parseInt(text.trim());
	}

	public static void main(String[] args) {
		Join j=new Join();
		j.setVisible(true);
	}

}