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모든 데이터를 배열에 저장했습니다. 대신 객체의 ArrayList에 저장하는 방법으로 전환하겠습니까? 필자는 기본적인 학생 객체 클래스를 작성했지만 Arraylist에서 저장하는 데 도움이 필요합니다. 모든 도움은 대단히 감사하겠습니다. ArrayList에이 라인 (28)에 생성되고 데이터는 라인 (300)에 설정되어있는 문제는 ArrayList에 보관하는 코드를 수정하는 방법 대신Array에서 ArrayList로 전환하는 방법은 무엇입니까?
public class IAdvise extends JFrame {
DateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
String[] columnNames = {"ID", "Name", "Major", "GPA", "Campus", "Home Address", "Phone Number", "Email", "Current CST courses", "Past CST course", "Fusture CST courses", "Notes"};
Object[][] data = new Object[60][12];
ArrayList<Student> al = new ArrayList<Student>();
JTable table = new JTable(data, columnNames) {
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
JFrame frame, frame1;
JPanel buttonPanel, buttonPanel2, tablePanel, addPanel, editPanel;
JLabel labelID, labelName, labelMajor, labelGPA, labelCampus, labelAddress, labelPhone, labelEmail,labelCurrent, labelPast, labelFuture, labelNotes;
JTextField txtID, txtName, txtMajor, txtGPA, txtCampus, txtAddress, txtPhone, txtEmail, txtCurrent, txtPast, txtFuture, txtNotes;
JButton btnAdd, btnEdit, btnDelete, btnSort, btnSave, btnAddInput, btnCancel;
int keyCode, rowIndex, rowNumber, noOfStudents;
IAdvise.ButtonHandler bh = new IAdvise.ButtonHandler();
public IAdvise() {
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
table.getSelectionModel().addListSelectionListener(new IAdvise.RowListener());
table.getColumnModel().getColumn(1).setPreferredWidth(150);
table.getColumnModel().getColumn(2).setPreferredWidth(150);
table.getColumnModel().getColumn(3).setPreferredWidth(50);
table.getColumnModel().getColumn(4).setPreferredWidth(200);
table.getColumnModel().getColumn(5).setPreferredWidth(250);
table.getColumnModel().getColumn(6).setPreferredWidth(150);
table.getColumnModel().getColumn(7).setPreferredWidth(150);
table.getColumnModel().getColumn(8).setPreferredWidth(150);
table.getColumnModel().getColumn(9).setPreferredWidth(150);
table.getColumnModel().getColumn(10).setPreferredWidth(150);
table.getColumnModel().getColumn(11).setPreferredWidth(150);
table.getTableHeader().setResizingAllowed(false);
table.getTableHeader().setReorderingAllowed(false);
JScrollPane scrollPane = new JScrollPane(table);
btnAdd = new JButton("Add Student");
btnAdd.addActionListener(bh);
btnEdit = new JButton("EDIT");
btnEdit.addActionListener(bh);
btnEdit.setEnabled(false);
btnDelete = new JButton("DELETE");
btnDelete.addActionListener(bh);
btnDelete.setEnabled(false);
btnSort = new JButton("Update");
btnSort.addActionListener(bh);
btnSave = new JButton("SAVE");
btnSave.addActionListener(bh);
btnSave.setActionCommand("Save");
btnAddInput = new JButton("Add Student");
btnAddInput.addActionListener(bh);
btnAddInput.setActionCommand("AddInput");
btnCancel = new JButton("Cancel");
btnCancel.addActionListener(bh);
labelID = new JLabel("ID");
labelName = new JLabel("NAME");
labelMajor = new JLabel("Major");
labelGPA = new JLabel("GPA");
labelCampus = new JLabel("Campus");
labelAddress = new JLabel("Address");
labelPhone = new JLabel("Phone Number");
labelEmail = new JLabel("Email");
labelCurrent = new JLabel("Current CST courses");
labelPast = new JLabel("Past CST courses");
labelFuture = new JLabel("Future CST courses");
labelNotes = new JLabel("Notes");
txtID = new JTextField(20);
txtName = new JTextField(20);
txtMajor = new JTextField(20);
txtGPA = new JTextField(20);
txtCampus = new JTextField(20);
txtAddress = new JTextField(20);
txtPhone = new JTextField(20);
txtEmail = new JTextField(20);
txtCurrent = new JTextField(20);
txtPast = new JTextField(20);
txtFuture = new JTextField(20);
txtNotes = new JTextField(20);
txtID.setDocument(new IAdvise.JTextFieldLimit(8));
txtID.addKeyListener(keyListener);
tablePanel = new JPanel();
tablePanel.setLayout(new BoxLayout(tablePanel, BoxLayout.PAGE_AXIS));
tablePanel.setBorder(BorderFactory.createEmptyBorder(10, 2, 0, 10));
tablePanel.add(table.getTableHeader());
tablePanel.add(table);
JScrollPane jScrollPane = new JScrollPane(tablePanel);
scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
scrollPane.setBounds(50, 30, 300, 50);
JPanel contentPane = new JPanel(null);
contentPane.setPreferredSize(new Dimension(500, 400));
contentPane.add(scrollPane);
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
c.ipady = 20;
c.insets = new Insets(10, 10, 10, 10);
c.fill = GridBagConstraints.HORIZONTAL;
buttonPanel.add(btnAdd, c);
c.gridx = 0;
c.gridy = 1;
c.fill = GridBagConstraints.HORIZONTAL;
c.ipady = 20;
c.insets = new Insets(10, 10, 10, 10);
buttonPanel.add(btnEdit, c);
c.gridx = 0;
c.gridy = 2;
c.fill = GridBagConstraints.HORIZONTAL;
c.ipady = 20;
c.insets = new Insets(10, 10, 10, 10);
buttonPanel.add(btnDelete, c);
c.gridx = 0;
c.gridy = 3;
c.ipady = 20;
c.insets = new Insets(10, 10, 10, 10);
c.fill = GridBagConstraints.HORIZONTAL;
buttonPanel.add(btnSort, c);
c.gridx = 0;
c.gridy = 4;
c.ipady = 20;
c.insets = new Insets(10, 10, 10, 10);
c.fill = GridBagConstraints.HORIZONTAL;
buttonPanel.add(btnSave, c);
frame = new JFrame("Tutoring Database");
frame.setVisible(true);
frame.setResizable(false);
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.add(tablePanel, BorderLayout.CENTER);
frame.add(buttonPanel, BorderLayout.EAST);
frame.pack();
addPanel = new JPanel();
addPanel.setLayout(new GridBagLayout());
c.insets = new Insets(1, 0, 1, 1);
c.gridx = 0;
c.gridy = 0;
addPanel.add(labelID, c);
c.gridy = 1;
addPanel.add(labelName, c);
c.gridy = 2;
addPanel.add(labelMajor, c);
c.gridy = 3;
addPanel.add(labelGPA, c);
c.gridy = 4;
addPanel.add(labelCampus, c);
c.gridy = 5;
addPanel.add(labelAddress, c);
c.gridy = 6;
addPanel.add(labelPhone, c);
c.gridy = 7;
addPanel.add(labelEmail, c);
c.gridy = 8;
addPanel.add(labelCurrent, c);
c.gridy = 9;
addPanel.add(labelPast, c);
c.gridy = 10;
addPanel.add(labelFuture, c);
c.gridy = 11;
addPanel.add(labelNotes, c);
// text fields
c.gridx = 1;
c.gridy = 0;
c.ipady = 1;
addPanel.add(txtID, c);
c.gridy = 1;
c.ipady = 1;
addPanel.add(txtName, c);
c.gridy = 2;
c.ipady = 1;
addPanel.add(txtMajor, c);
c.gridy = 3;
c.ipady = 1;
addPanel.add(txtGPA, c);
c.gridy = 4;
c.ipady = 1;
addPanel.add(txtCampus, c);
c.gridy = 5;
c.ipady = 1;
addPanel.add(txtAddress, c);
c.gridy = 6;
c.ipady = 1;
addPanel.add(txtPhone, c);
c.gridy = 7;
c.ipady = 1;
addPanel.add(txtEmail, c);
c.gridy = 8;
c.ipady = 1;
addPanel.add(txtCurrent, c);
c.gridy = 9;
c.ipady = 1;
addPanel.add(txtPast, c);
c.gridy = 10;
c.ipady = 1;
addPanel.add(txtFuture, c);
c.gridy = 11;
c.ipady = 1;
addPanel.add(txtNotes, c);
buttonPanel2 = new JPanel();
buttonPanel2.setLayout(new GridLayout(1, 1));
buttonPanel2.add(btnAddInput);
buttonPanel2.add(btnCancel);
frame1 = new JFrame("Student Database");
frame1.setVisible(false);
frame1.setResizable(false);
frame1.setDefaultCloseOperation(HIDE_ON_CLOSE);
frame1.add(addPanel, BorderLayout.CENTER);
frame1.add(buttonPanel2, BorderLayout.PAGE_END);
frame1.pack();
}// end
KeyListener keyListener = new KeyListener() {
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
keyCode = e.getKeyCode();
if (!(keyCode >= 48 && keyCode <= 57) && !(keyCode >= 96 && keyCode <= 105)
&& !(keyCode >= 37 && keyCode <= 40) && !(keyCode == 127 || keyCode == 8)) {
txtID.setEditable(false);
}
}
@Override
public void keyReleased(KeyEvent e) {
txtID.setEditable(true);
}
};
class RowListener implements ListSelectionListener {
@Override
public void valueChanged(ListSelectionEvent event) {
if (event.getValueIsAdjusting()) {
rowIndex = table.getSelectedRow();
if (data[rowIndex][0] == null || data[rowIndex][0] == "") {
btnEdit.setEnabled(false);
btnDelete.setEnabled(false);
} else {
btnEdit.setEnabled(true);
btnDelete.setEnabled(true);
}
}
}
}
class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("Add Student")) {
txtID.setText("");
txtName.setText("");
txtMajor.setText("");
txtGPA.setText("");
txtCampus.setText("");
txtAddress.setText("");
txtPhone.setText("");
txtEmail.setText("");
txtCurrent.setText("");
txtPast.setText("");
txtFuture.setText("");
txtNotes.setText("");
Student student = new Student(txtID.getText(), txtName.getName(), txtMajor.getText(), txtGPA.getText(), txtCampus.getText(), txtAddress.getText(), txtPhone.getText(),txtEmail.getText(), txtCurrent.getText(), txtPast.getText(), txtFuture.getText(), txtNotes.getText());
al.add(student);
frame1.setTitle("Add Student data"); // title bar name for add
frame1.setVisible(true);
} else if (e.getActionCommand().equals("EDIT")) {
txtID.setText(data[rowIndex][0] + "");
txtName.setText(data[rowIndex][1] + "");
txtMajor.setText(data[rowIndex][2] + "");
txtGPA.setText(data[rowIndex][3] + "");
txtCampus.setText(data[rowIndex][4] + "");
txtAddress.setText(data[rowIndex][5] + "");
txtPhone.setText(data[rowIndex][6] + "");
txtEmail.setText(data[rowIndex][7] + "");
txtCurrent.setText(data[rowIndex][8] + "");
txtPast.setText(data[rowIndex][9] + "");
txtFuture.setText(data[rowIndex][10] + "");
txtNotes.setText(data[rowIndex][11] + "");
txtID.setEditable(false);
frame1.setTitle("Enter Student data");
btnAddInput.setActionCommand("Edit2");
btnAddInput.setText("ACCEPT");
frame1.setVisible(true);
} else if (e.getActionCommand().equals("DELETE")) {
int confirm = JOptionPane.showConfirmDialog(frame, "ARE YOU SURE?", "CONFIRM",
JOptionPane.YES_NO_OPTION);
if (confirm == 0) {
rowIndex = table.getSelectedRow();
rowNumber = 0;
noOfStudents--;
for (int i = 0; i <= 10; i++) {
if (rowIndex != i && i <= noOfStudents) {
data[rowNumber][0] = data[i][0];
data[rowNumber][1] = data[i][1];
data[rowNumber][2] = data[i][2];
data[rowNumber][3] = data[i][3];
data[rowNumber][4] = data[i][4];
data[rowNumber][5] = data[i][5];
data[rowNumber][6] = data[i][6];
data[rowNumber][7] = data[i][7];
data[rowNumber][8] = data[i][8];
data[rowNumber][9] = data[i][9];
data[rowNumber][10] = data[i][10];
data[rowNumber][11] = data[i][11];
rowNumber++;
} else if (rowIndex != i && i > noOfStudents) {
data[rowNumber][0] = "";
data[rowNumber][1] = "";
data[rowNumber][2] = "";
data[rowNumber][3] = "";
data[rowNumber][4] = "";
data[rowNumber][5] = "";
data[rowNumber][6] = "";
data[rowNumber][7] = "";
data[rowNumber][8] = "";
data[rowNumber][9] = "";
data[rowNumber][10] = "";
data[rowNumber][11] = "";
rowNumber++;
}
}
if (noOfStudents == 1000) {
btnAdd.setEnabled(false);
}
else {
btnAdd.setEnabled(true);
}
if (noOfStudents == 0) {
btnDelete.setEnabled(false);
btnEdit.setEnabled(false);
} else {
btnDelete.setEnabled(true);
btnEdit.setEnabled(true);
}
rowIndex = table.getSelectedRow();
if (data[rowIndex][0] == null || data[rowIndex][0] == "") {
btnEdit.setEnabled(false);
btnDelete.setEnabled(false);
} else {
btnEdit.setEnabled(true);
btnDelete.setEnabled(true);
}
table.updateUI();
}
} else if (e.getActionCommand().equals("AddInput")) {
if (txtID.getText().isEmpty() || txtName.getText().isEmpty()
|| txtMajor.getText().isEmpty()///
|| txtGPA.getText().isEmpty() || txtCampus.getText().isEmpty()|| txtEmail.getText().isEmpty()
|| txtCurrent.getText().isEmpty()|| txtPast.getText().isEmpty()|| txtFuture.getText().isEmpty()
|| txtNotes.getText().isEmpty() || txtPhone.getText().isEmpty()) {
JOptionPane.showMessageDialog(null, "PLEASE FILL IN THE BLANKS.", "ERROR!",
JOptionPane.ERROR_MESSAGE);
}
else {
int dup = 0;
for (int i = 0; i < 8; i++) {
if (txtID.getText().equals(data[i][0])) {
JOptionPane.showMessageDialog(null, "ID NUMBER ALREADY EXISTS.", "ERROR!",
JOptionPane.ERROR_MESSAGE);
dup++;
}
}
if (dup == 0) {
rowIndex = table.getSelectedRow();
data[noOfStudents][0] = txtID.getText();
data[noOfStudents][1] = txtName.getText();
data[noOfStudents][2] = txtMajor.getText();
data[noOfStudents][3] = txtGPA.getText();
data[noOfStudents][4] = txtCampus.getText();
data[noOfStudents][5] = txtAddress.getText();
data[noOfStudents][6] = txtPhone.getText();
data[noOfStudents][7] = txtEmail.getText();
data[noOfStudents][8] = txtCurrent.getText();
data[noOfStudents][9] = txtPast.getText();
data[noOfStudents][10] = txtFuture.getText();
data[noOfStudents][11] = txtNotes.getText();
table.updateUI();
frame1.dispose();
noOfStudents++;
if (noOfStudents == 50){
btnAdd.setEnabled(false);
}
else {
btnAdd.setEnabled(true);
}
if (data[rowIndex][0] == null) {
btnEdit.setEnabled(false);
btnDelete.setEnabled(false);
} else {
btnEdit.setEnabled(true);
btnDelete.setEnabled(true);
}
}
}
table.updateUI();
}else if(e.getActionCommand().equals("Save")){
try {
PrintWriter out = new PrintWriter("Tutor.txt");
for(int i = 0; i < 25; i++)
{
for(int j = 0; j < 10; j++)
{
out.print(data[i][j]);
out.print(", ");
if(j == 10){
out.println();
}
} out.flush();
}} catch (FileNotFoundException ex) {
}
} else if (e.getActionCommand().equals("Update")) {
}
if (txtID.getText().isEmpty() || txtName.getText().isEmpty()
|| txtMajor.getText().isEmpty()///
|| txtGPA.getText().isEmpty() || txtCampus.getText().isEmpty()|| txtEmail.getText().isEmpty()
|| txtCurrent.getText().isEmpty()|| txtPast.getText().isEmpty()|| txtFuture.getText().isEmpty()
|| txtNotes.getText().isEmpty()) {
} else {
data[rowIndex][0] = txtID.getText();
data[rowIndex][1] = txtName.getText();
data[rowIndex][2] = txtMajor.getText();
data[rowIndex][3] = txtGPA.getText();
data[rowIndex][4] = txtCampus.getText();
data[rowIndex][5] = txtAddress.getText();
data[rowIndex][6] = txtPhone.getText();
data[rowIndex][7] = txtEmail.getText();
data[rowIndex][8] = txtEmail.getText();
data[rowIndex][9] = txtEmail.getText();
data[rowIndex][10] = txtEmail.getText();
data[rowIndex][11] = txtEmail.getText();
frame1.dispose();
}
table.updateUI();
}
}
class JTextFieldLimit extends PlainDocument {
private int limit;
JTextFieldLimit(int limit) {
super();
this.limit = limit;
}
JTextFieldLimit(int limit, boolean upper) {
super();
this.limit = limit;
}
@Override
public void insertString(int offset, String str, AttributeSet attr)
throws BadLocationException {
if (str == null) {
return;
}
if ((getLength() + str.length()) <= limit) {
super.insertString(offset, str, attr);
}
}
}
public static void main(String[] args) {
new IAdvise();
}
}
학생 클래스입니다 :
public class Student implements java.io.Serialize{
private final String id;
private final String name;
private final String major;
private final String gpa;
private final String campus;
private final String address;
private final String number;
private final String email;
private final String current;
private final String past;
private final String future;
public Student(String id, String name, String major,String gpa, String campus, String address,String number, String email, String current, String past, String future, String notes) {
this.id = id;
this.name = name;
this.major = major;
this.gpa = gpa;
this.campus = campus;
this.address = address;
this.number = number;
this.email = email;
this.current = current;
this.past = past;
this.future = future;
}
}
다음 번에 [SSCCE] (http://sscce.org/)를 게시하십시오. 그것은 당신이 이해하고 있으며, 당신이 요구하고있는 것을 보여주고, 좋은 대답의 기회를 증가시킵니다. 또한 응답자에게 많은 시간을 절약 할 수 있습니다. – Seagull
회선 번호가 꺼져 있습니다. 300 행은'actionPerformed'의 중간에있는 임의의 라인입니다. 나는 당신이 무엇을 묻고 있는지 분명하지 않다 ... 당신은 기존의 배열로부터'ArrayList'를 생성하는 방법을 묻고 있는가? 아니면'ArrayList'를 사용하도록 현재 배열을 사용하는 코드를 수정하는 방법을 묻는가? 대신에? – ajb
Im는 ArrayList를 사용하도록 코드를 수정하는 방법을 묻습니다.unclarity에 대한 미안 – DSheehan56