학원 7일차 복습(3/22)

2018. 3. 22. 20:13

이론

Generic: 객체의 cast를 줄임으로서 불필요한 메모리 낭비를 방지하자는 목적

Collection에 Object형을 사용하지 않고 전용객체로 사용하는 개념!

JDK5부터 지원, JDK7 버젼부터 생성시 <>로 축약가능!

모든 Collection은 반복자(iterator)를 제공해줌

반복자 객체의 hasNext()와 next() 메소드를 이용하여서 컬렉션의 각 원소들을 접근 하게 된다.

MemberVO: 순수하게 회원의 값만을 가지는 객체

Set구조는 중복을 허용하지 않는다. 중복을 제거하면서 반복자, 향상된 for문에 TreeSet오름차순 정렬을 보장함

event 처리하기 위해서는 이벤트 감지자가 필요하다.

발생하는 이벤트의 종류를 파악한 후 이벤트처리 인터페이스를 구현, 버튼에 이벤트 감지자를 등록 해놔야 한다.

cardLayout 생성해서 이벤트가 발생할 때 마다 자식카드를 호출 하기위함

event처리

입력이 완료된 이후 다음페이지로 이동하기 위해서 card를 호출

실습

ex2.Ex2_Generic

package ex2;

import java.util.ArrayList;
import java.util.Iterator;
//Collection에 Object형을 사용하지 않고 전용객체로 사용하는 개념!
//JDK5부터 지원!

public class Ex2_Generic {
    public static void main(String[] args) {
        //JDK7 버젼부터 생성시 <>로 축약가능!
        ArrayList<String> ar = new ArrayList<>();
        //Generic: 객체의 cast를 줄임으로서 불필요한 메모리 낭비를 방지하자는
        //목적입니다. jdk5부터 지원
        ar.add("Test");
        ar.add("Test");
        ar.add("10");
        for(String e : ar){
            System.out.println(e);
        }
        System.out.println("-----------------");
        //모든 Collection은 반복자를 제공해줌
        Iterator<String> it = ar.iterator();
        while(it.hasNext()){//반복할 데이터값이 있으면 true
            String next = it.next();//요소의 값
            System.out.println(next);
        }
        //연습문제) Integer용 ArrayList를 만들고
        //적절한 값을 저장한 후 향상된 for,Iterator를 사용해서
        //출력해봅시다.
        System.out.println("-----------------");
        ArrayList<Integer> arr2 = new ArrayList<>();
        arr2.add(1000);
        arr2.add(2000);
        arr2.add(3000);
        Iterator<Integer> it2 = arr2.iterator();
         while(it2.hasNext()){
            Integer next = it2.next();
            System.out.println(next);
        }
         System.out.println("-----------------");
         for(Integer e : arr2){
            System.out.println(e);
        }
        
    }
}

ex2.Ex3_MemArray

ex2.MemberVO

ex1.MemberDemo

package ex1;

import java.awt.CardLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JTextArea;

public class MemberDemo extends javax.swing.JFrame {
    //cardLayout 생성해서 이벤트가 발생할 때 마다 자식카드를 호출 하기위함
    private CardLayout card;

/**
     * Creates new form MemberDemo
     */
    public MemberDemo() {
        initComponents();
        card = (CardLayout) pp.getLayout();
        //event처리
        addBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String msgv = msg.getText();
                jTextArea1.append(msgv+"\n");
                //입력이 완료된 이후 다음페이지로 이동하기 위해서 card를 호출
                card.show(pp, "c2");
            }
        });
    }

/**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

pp = new javax.swing.JPanel();
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        msg = new javax.swing.JTextField();
        addBtn = new javax.swing.JButton();
        jPanel2 = new javax.swing.JPanel();
        insertBtn = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

pp.setLayout(new java.awt.CardLayout());

jPanel1.setBackground(new java.awt.Color(255, 204, 204));

jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/ex1/img/img1.PNG"))); // NOI18N
        jLabel1.setText("jLabel1");

jLabel2.setText("MSG:");

addBtn.setText("입력");

javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(10, 10, 10)
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 387, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 68, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(msg, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(addBtn, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(25, 25, 25))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(54, 54, 54)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(msg, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(addBtn))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 453, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );

pp.add(jPanel1, "c1");

jPanel2.setBackground(new java.awt.Color(204, 204, 255));

insertBtn.setText("입력폼");
        insertBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                insertBtnActionPerformed(evt);
            }
        });

jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 592, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 52, Short.MAX_VALUE)
                .addComponent(insertBtn)
                .addGap(31, 31, 31))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 434, Short.MAX_VALUE)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addGap(0, 0, Short.MAX_VALUE)
                        .addComponent(insertBtn)))
                .addGap(31, 31, 31))
        );

pp.add(jPanel2, "c2");

pack();
    }// </editor-fold>

private void insertBtnActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        card.show(pp, "c1");
    }

/**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(MemberDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(MemberDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(MemberDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(MemberDemo.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

/* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MemberDemo().setVisible(true);
            }
        });
    }

// Variables declaration - do not modify                     
    private javax.swing.JButton addBtn;
    private javax.swing.JButton insertBtn;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField msg;
    private javax.swing.JPanel pp;
    // End of variables declaration                   
}

ex1.Ex1_HashSet

package ex1;

import java.util.HashSet;
import java.util.Iterator;
import java.util.TreeSet;

public class Ex1_HashSet {
    //Set구조는 중복을 허용하지 않는다.
    //중복을 제거하면서 반복자, 향상된 for문에 TreeSet오름차순 정렬을 보장함
    public static void main(String[] args) {
        HashSet<String> h1 = new HashSet<>();
        //TreeSet<String> h1 = new HashSet<>();
        h1.add("C");
        h1.add("ATest");
        h1.add("ATest");
        h1.add("B");
        h1.add("D");
        h1.add("D");
        h1.add("A");
        h1.add("A");
        System.out.println("크기 :"+h1.size());
        System.out.println("A문자 포함여부: "+h1.contains("A"));
        Iterator<String> it1 = h1.iterator();
        while(it1.hasNext()){
            String next = it1.next();
            System.out.println(next);
        }
        System.out.println("-----------------------");
        //향상된 for문으로 출력 해보기
        for(String e : h1){
            System.out.println(e);
        }
        System.out.println("-----------------------");
        //HashSet<Integer> h2 = new TreeSet<>();
        TreeSet<Integer> h2 = new TreeSet<>();
        h2.add(10);
        h2.add(55);
        h2.add(19);
        h2.add(8);
        h2.add(11);
        h2.add(1);
        h2.add(19);
        //Iterator<Integer> it2 = h2.iterator(); //오름차순
       Iterator<Integer> it2 = h2.descendingIterator(); //내림차순
        while(it2.hasNext()){
            Integer next = it2.next();
            System.out.println(next);
        }
        
    }
}

ex1.Ex2_ArrayVsLinked

package ex1;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;

public class Ex2_ArrayVsLinked {

private ArrayList<String> arlist;
    private LinkedList<String> linklist;

public Ex2_ArrayVsLinked() {//생성자로 초기화
        arlist = new ArrayList<>();
        linklist = new LinkedList<>();

}

public long testTime(String type1) {//1,2번에 따른 분류, 소요시간
        long start = System.currentTimeMillis();
        if (type1.equals("1")) {
            exe(arlist);
        } else {
            exe(linklist);
        }
        long end = System.currentTimeMillis();
        return (end - start);
    }

//    private void exe(ArrayList<String> list) {
//        for (int i = 0; i < 10000000; i++) {
//            list.add(String.valueOf(i));
//        }
//        System.out.println("arlist :" + list.size());
//    }
//
//    private void exe(LinkedList<String> list) {
//        for (int i = 0; i < 10000000; i++) {
//            list.add(String.valueOf(i));
//        }
//        System.out.println("linklist :" + list.size());
//    }
     private void exe(List<String> list) {
        for (int i = 0; i < 10000000; i++) {
            list.add(String.valueOf(i));
        }
        System.out.println("arlist :" + list.size());
    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("1.ArrayList , 2.LinkedList:  ");
        String type = sc.nextLine();
        Ex2_ArrayVsLinked ea = new Ex2_ArrayVsLinked();
        System.out.println("걸린시간: "+ea.testTime(type)+"초");
    }
}

team.MemberInfo

package team;

public class MemberInfo {
    
    private String id;
    private String pwd;
    private int age;
    private String ssn;
    private boolean adult;//미성년
    private boolean gender;//성별

public MemberInfo(String id, String pwd, int age, String ssn, boolean adult, boolean gender) {
        this.id = id;
        this.pwd = pwd;
        this.age = age;
        this.ssn = ssn;
        this.adult = adult;
        this.gender = gender;
    }

public MemberInfo(String id, String pwd, int age) {
        this.id = id;
        this.pwd = pwd;
        this.age = age;
    }

public MemberInfo() {
    }

public boolean isAdult() {
        return adult;
    }

public void setAdult(boolean adult) {
        this.adult = adult;
    }

public boolean isGender() {
        return gender;
    }

public void setGender(boolean gender) {
        this.gender = gender;
    }

public String getId() {
        return id;
    }

public void setId(String id) {
        this.id = id;
    }

public String getPwd() {
        return pwd;
    }

public void setPwd(String pwd) {
        this.pwd = pwd;
    }

public int getAge() {
        return age;
    }

public void setAge(int age) {
        this.age = age;
    }

public String getSsn() {
        return ssn;
    }

public void setSsn(String ssn) {
        this.ssn = ssn;
    }

}

team.MemberList

package team;

import java.util.ArrayList;
public class MemberList {
    private ArrayList<MemberInfo> memberlist = new ArrayList<>();

public MemberList() {
    }

public void MemberIn(String id, String pwd, int age, String ssn) {
        boolean gender = false;
        boolean adult = false;
        String[] str = ssn.split("-");

//성별 남 false 여 true
        switch (str[1].charAt(0)) {
            case '1':
            case '3':
                gender = false;//남자
                break;
            case '2':
            case '4':
                gender = true;//여자
                break;
        }
        
        //입력받은 나이
        if(age > 18) adult = true;
        else adult = false;

//생성자로 초기화
        MemberInfo mi = new MemberInfo(id, pwd, age, ssn, adult, gender);
        memberlist.add(mi);
    }

public void MemberIn(String id, String pwd, int age) {
        MemberInfo mi = new MemberInfo(id, pwd, age);
        memberlist.add(mi);
    }
    
    //어레이리스트를 한꺼번에 넣는다
    /*
    public MemberInfo getMi() {
        return mi;
    }*/

public ArrayList<MemberInfo> getMemberlist() {
        return memberlist;
    }

public void setMemberlist(ArrayList<MemberInfo> memberlist) {
        this.memberlist = memberlist;
    }
}

team.GuiJoin

package team;

import java.awt.CardLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Iterator;

public class GuiJoin extends javax.swing.JFrame {

//cardLayout 생성해서 이벤트가 발생할때마다
    //자식카드를 호출 하기 위함
    //1.카드 레이아웃 생성한다
    private CardLayout card;
    private MemberInfo mi;

//멤버넣을 리스트 생성
    /**
     * Creates new form MemberDemo
     */
    public GuiJoin() {
        initComponents();
        MemberList list = new MemberList();
        //2.카드에 디자인의 레이아웃값을 준다
        card = (CardLayout) pp.getLayout();
        
        //입력 버튼, GUI에서 값을 입력하고 리스트에 추가
        addBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                list.MemberIn(id.getText(), pwd.getText(), 
                        Integer.parseInt(age.getText()), ssn.getText());
                po.setText("입력되써어...");
            }
        });

//입력 버튼
        addBtn1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //리스트에 추가하는 방법
                if (list.getMemberlist().size() < 1) {
                    System.out.println("내용없음");
                    return;
                }
                jTextArea1.setText("");
                jTextArea1.append("id\t"
                        + "pwd\t"
                        + "age\t"
                        + "성년\t"
                        + "성별(남false 여true)\n");

for (MemberInfo m : list.getMemberlist()) {
                    jTextArea1.append(m.getId() + "\t"
                            + m.getPwd() + "\t"
                            + m.getAge() + "\t"
                            + m.isAdult() + "\t"
                            + m.isGender() + "\n");
                }

//입력이 완료된 이후 다음페이지로 이동하기
                card.show(pp, "card2");
            }
        });
    }

pp = new javax.swing.JPanel();
        jPanel3 = new javax.swing.JPanel();
        label1_img = new javax.swing.JLabel();
        label2 = new javax.swing.JLabel();
        id = new javax.swing.JTextField();
        addBtn = new javax.swing.JButton();
        po = new javax.swing.JLabel();
        label4 = new javax.swing.JLabel();
        pwd = new javax.swing.JTextField();
        age = new javax.swing.JTextField();
        ssn = new javax.swing.JTextField();
        label5 = new javax.swing.JLabel();
        label6 = new javax.swing.JLabel();
        addBtn1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jPanel4 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        insertBtn = new javax.swing.JButton();
        jLabel2 = new javax.swing.JLabel();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("보노보노야아");
        setLocation(new java.awt.Point(800, 400));
        setPreferredSize(new java.awt.Dimension(615, 679));
        setResizable(false);

pp.setLayout(new java.awt.CardLayout());

jPanel3.setBackground(new java.awt.Color(204, 204, 255));
        jPanel3.setForeground(new java.awt.Color(204, 204, 204));
        jPanel3.setPreferredSize(new java.awt.Dimension(613, 679));

label1_img.setIcon(new javax.swing.ImageIcon(getClass().getResource("/team/bono1.PNG"))); // NOI18N

label2.setText("id");

addBtn.setText("입력");

po.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        po.setText("포로리야아....입력...해애...");

label4.setText("pwd");

pwd.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                pwdActionPerformed(evt);
            }
        });

label5.setText("ssn");

label6.setText("age");

addBtn1.setText("리스트로");

jLabel1.setText("Member Join");

javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(po, javax.swing.GroupLayout.PREFERRED_SIZE, 516, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(jPanel3Layout.createSequentialGroup()
                        .addGap(10, 10, 10)
                        .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addGroup(jPanel3Layout.createSequentialGroup()
                                .addComponent(addBtn)
                                .addGap(28, 28, 28)
                                .addComponent(addBtn1))
                            .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                .addGroup(jPanel3Layout.createSequentialGroup()
                                    .addComponent(label5)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 112, Short.MAX_VALUE)
                                    .addComponent(ssn, javax.swing.GroupLayout.PREFERRED_SIZE, 344, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addGroup(jPanel3Layout.createSequentialGroup()
                                    .addComponent(label6)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(age, javax.swing.GroupLayout.PREFERRED_SIZE, 344, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel3Layout.createSequentialGroup()
                                    .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addComponent(label4)
                                        .addComponent(label2))
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                        .addComponent(id, javax.swing.GroupLayout.DEFAULT_SIZE, 344, Short.MAX_VALUE)
                                        .addComponent(pwd)))))))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGap(51, 51, 51)
                .addComponent(label1_img, javax.swing.GroupLayout.DEFAULT_SIZE, 591, Short.MAX_VALUE)
                .addContainerGap())
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGap(268, 268, 268)
                .addComponent(jLabel1)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addComponent(jLabel1)
                .addGap(18, 18, 18)
                .addComponent(label1_img, javax.swing.GroupLayout.PREFERRED_SIZE, 313, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(po)
                .addGap(36, 36, 36)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(label2, javax.swing.GroupLayout.PREFERRED_SIZE, 24, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(id, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(label4, javax.swing.GroupLayout.PREFERRED_SIZE, 24, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(pwd, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(label6, javax.swing.GroupLayout.PREFERRED_SIZE, 24, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(age, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(label5, javax.swing.GroupLayout.PREFERRED_SIZE, 24, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(ssn, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(addBtn)
                    .addComponent(addBtn1))
                .addGap(0, 98, Short.MAX_VALUE))
        );

pp.add(jPanel3, "card1");

jPanel4.setBackground(new java.awt.Color(204, 255, 204));
        jPanel4.setPreferredSize(new java.awt.Dimension(613, 679));

jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

jLabel2.setText("Member List");

javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
        jPanel4.setLayout(jPanel4Layout);
        jPanel4Layout.setHorizontalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                .addContainerGap(41, Short.MAX_VALUE)
                .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(insertBtn)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 535, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(37, 37, 37))
            .addGroup(jPanel4Layout.createSequentialGroup()
                .addGap(266, 266, 266)
                .addComponent(jLabel2)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel4Layout.setVerticalGroup(
            jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
                .addContainerGap(53, Short.MAX_VALUE)
                .addComponent(jLabel2)
                .addGap(38, 38, 38)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 499, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(insertBtn)
                .addGap(33, 33, 33))
        );

pp.add(jPanel4, "card2");

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 615, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(pp, javax.swing.GroupLayout.PREFERRED_SIZE, 591, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 690, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(pp, javax.swing.GroupLayout.PREFERRED_SIZE, 670, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
        );

pack();
    }// </editor-fold>

private void insertBtnActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        //지워주기
        id.setText("");
        pwd.setText("");
        age.setText("");
        ssn.setText("");
        po.setText("포로리야..입력해...");
        card.show(pp, "card1");
    }

private void pwdActionPerformed(java.awt.event.ActionEvent evt) {                                    
        // TODO add your handling code here:
    }

try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(GuiJoin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(GuiJoin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(GuiJoin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(GuiJoin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

/* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new GuiJoin().setVisible(true);
            }
        });
    }

// Variables declaration - do not modify                     
    private javax.swing.JButton addBtn;
    private javax.swing.JButton addBtn1;
    private javax.swing.JTextField age;
    private javax.swing.JTextField id;
    private javax.swing.JButton insertBtn;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JLabel label1_img;
    private javax.swing.JLabel label2;
    private javax.swing.JLabel label4;
    private javax.swing.JLabel label5;
    private javax.swing.JLabel label6;
    private javax.swing.JLabel po;
    private javax.swing.JPanel pp;
    private javax.swing.JTextField pwd;
    private javax.swing.JTextField ssn;
    // End of variables declaration                   
}//클래스의 끝

team.ConsoleJoin

package team;

import java.util.ArrayList;
import java.util.Scanner;

public class ConsoleJoin{

public static void excute() {
        MemberList list = new MemberList();
        String id,pwd;
        int age;
        while (true) {
            System.out.print("메뉴 1 - 입력, 2 - 출력, 3 - 종료: ");
            Scanner sc = new Scanner(System.in);
            int menuNum = Integer.parseInt(sc.nextLine());
            if (menuNum == 1) {
                System.out.print("ID: ");
                id= sc.nextLine();
                System.out.print("PWD: ");
                pwd= sc.nextLine();
                System.out.print("AGE: ");
                age =Integer.parseInt(sc.nextLine());
                list.MemberIn(id, pwd, age);
                System.out.println("현재 총 회원: "+list.getMemberlist().size());

} else if (menuNum == 2) {
                for (MemberInfo e : list.getMemberlist()) {
                    System.out.println("ID: " + e.getId());
                    System.out.println("PWD: " + e.getPwd());
                    System.out.println("AGE: " + e.getAge());
                    System.out.println("--------------------");
                }
            } else if (menuNum == 3) {
                System.out.println("종료되었습니다.");
                break;
            } else {
                System.out.println("잘못된 입력입니다.");
            }

}
    }

public static void main(String[] args) {
        excute(); //static 메서드 호출
    }
}

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