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이 코드는 MVC 디자인 재잘를 사용하는 다음 코드중복 값과 몇 가지 방법이
package test;
import java.awt.*;
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.*;
import javax.swing.event.SwingPropertyChangeSupport;
public class MainGui {
public MainGui() {
new WizardPanel().setVisible(true);
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
new MainGui();
} catch (Exception e) {
e.printStackTrace();
}
}
}
class WizardPanel extends JDialog {
private JPanel cardPanel, buttonPanel;
private JButton next;
private CardLayout c1;
private SimpleModel simpleModel = new SimpleModel();
private FileSelector fileSelector;
private DelemeterSelector delemeterSelector;
public WizardPanel() {
fileSelector = FileSelector.getInstance();
delemeterSelector = DelemeterSelector.getInstance();
fileSelector.setModel(simpleModel); //!!
delemeterSelector.setModel(simpleModel); //!!
cardPanel = new JPanel();
c1 = new CardLayout();
cardPanel.setLayout(c1);
cardPanel.add(fileSelector, "1");
cardPanel.add(delemeterSelector, "2");
c1.show(cardPanel, "1");
buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
next = new JButton("Next");
next.addActionListener(new WizardPanel.NextButtonAction());
buttonPanel.add(next);
// Creating the GUI
this.setLayout(new BorderLayout());
this.add(cardPanel, "Center");
this.add(buttonPanel, "South");
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
this.setResizable(true);
this.pack();
this.setVisible(true);
}
private class NextButtonAction implements ActionListener {
public void actionPerformed(ActionEvent ae) {
// c1.show(cardPanel, "2");
c1.next(cardPanel); //!!
}
}
}
class FileSelector extends JPanel {
private JLabel fileName, description;
private JTextField fileTxt;
private JButton browse;
private GridBagLayout gbl;
private GridBagConstraints gbc;
private SimpleModel simpleModel;
private static FileSelector instance = null;
private FileSelector() {
// Intializing instance variables
fileName = new JLabel("File Name: ");
description = new JLabel("Specify the source of the data");
fileTxt = new JTextField(10);
browse = new JButton("Browse");
browse.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (simpleModel != null) {
simpleModel.setFileText(fileTxt.getText());
}
}
});
gbl = new GridBagLayout();
gbc = new GridBagConstraints();
// Creating GUI
this.setLayout(new GridLayout(2,1));
this.add(description);
this.add(locationPanel());
this.setBorder(BorderFactory.createEmptyBorder());
}
public void setModel(SimpleModel simpleModel) {
this.simpleModel = simpleModel;
}
private JPanel locationPanel() {
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout());
panel.add(fileName);
panel.add(fileTxt);
panel.add(browse);
return panel;
}
public static FileSelector getInstance() {
if (instance == null) {
instance = new FileSelector();
}
return instance;
}
}
class DelemeterSelector extends JPanel {
private JLabel description;
private JRadioButton tabBtn, semicolanBtn, commaBtn, spaceBtn;
private JTextArea txtArea;
private JScrollPane scroll;
private ButtonGroup btnGroup;
private GridBagLayout gbl;
private GridBagConstraints gbc;
private SimpleModel simpleModel;
private String str;
private static DelemeterSelector instance = null;
private DelemeterSelector() {
description = new JLabel(
"What delemeter separates your fields? Select the appropreiate delemeter");
tabBtn = new JRadioButton("Tab");
tabBtn.addItemListener(new RadioAction());
semicolanBtn = new JRadioButton("Semicolan");
semicolanBtn.addItemListener(new RadioAction());
commaBtn = new JRadioButton("Comma");
commaBtn.addItemListener(new RadioAction());
spaceBtn = new JRadioButton("Space");
spaceBtn.addItemListener(new RadioAction());
btnGroup = new ButtonGroup();
btnGroup.add(tabBtn);
btnGroup.add(semicolanBtn);
btnGroup.add(commaBtn);
btnGroup.add(spaceBtn);
txtArea = new JTextArea(20, 70);
scroll = new JScrollPane(txtArea);
gbl = new GridBagLayout();
gbc = new GridBagConstraints();
this.setLayout(new GridLayout(3,1));
// Creating the GUI
this.add(description);
this.add(radioPanel());
this.add(scroll);
}
private JPanel radioPanel() {
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout());
panel.add(tabBtn);
panel.add(semicolanBtn);
panel.add(commaBtn);
panel.add(spaceBtn);
panel.setBorder(BorderFactory
.createTitledBorder("Choose the Delimeter that seperates your fields"));
return panel;
}
//!!
public void setModel(final SimpleModel simpleModel) {
this.simpleModel = simpleModel;
simpleModel.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
txtArea.append("File Text: " + simpleModel.getFileText() + "\n");
}
});
}
public static DelemeterSelector getInstance() {
if (instance == null) {
instance = new DelemeterSelector();
}
return instance;
}
private class RadioAction implements ItemListener
{
public void itemStateChanged(ItemEvent ae)
{
if(ae.getStateChange()==ItemEvent.SELECTED){
if(ae.getSource().equals(commaBtn))
{
str = ".";
}
else if(ae.getSource().equals(spaceBtn))
{
str = " ";
}
else if(ae.getSource().equals(semicolanBtn))
{
str = ";";
}
simpleModel.setDelemeter(str);}
}
}
}
class SimpleModel {
public static final String FILE_TEXT = "file text";
public static final String FILE_DELEMETER = "dELEMETERtext";
private SwingPropertyChangeSupport pcSupport =
new SwingPropertyChangeSupport(this);
private String fileText;
private String str;
public void addPropertyChangeListener(PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(listener);
}
public void setFileText(String fileText) {
String oldValue = this.fileText;
String newValue = fileText;
this.fileText = fileText;
pcSupport.firePropertyChange(FILE_TEXT, oldValue , newValue);
}
public String getFileText() {
return fileText;
}
public void setDelemeter(String str)
{
String oldValue = this.str;
String newValue = str;
this.str = str;
pcSupport.firePropertyChange(FILE_DELEMETER, oldValue , newValue);
System.out.println(str);
}
}
에서 참조하시기 바랍니다. 첫 번째 슬라이딩 윈도우에서 JTextField의 텍스트를 기록합니다. 사용자가 두 번째 창으로 이동하면 첫 번째 창에 입력 한 텍스트가 JTextArea에 표시됩니다.
이제 할당 된 라디오 버튼 중 하나를 클릭하십시오. JTextArea가 첫 번째 창에 입력 된 데이터를 표시하고있는 것을 볼 수 있습니다. 심지어 그 곳에서 getFileText() 메서드를 호출하지 않습니다. getFileText() 메서드를 계속 호출하고 JRadioButton을 클릭 할 때마다 JTextArea를 계속 업데이트하는 것처럼 보입니다. 하지만 JRadioButton의 액션 클래스 안에서는 결코 그런 액션을 요구하지 않았습니다.
왜이 오류가 발생하고 있습니까? 도와주세요!
당신은 훨씬 단순한 코드가됩니다. 또한 무국적으로 만들었으므로 RadioButtonAction을 여러 번 인스턴스화 할 필요가 없습니다. 한번 인스턴스화하고 어디서나 설정할 수 있습니다. 그리고 btw, 당신은 오타가 있습니다 : 그것은 "Delemeter"가 아니라 "구분 기호"입니다 –
원래 코드를 완료했습니다. 그러나 문제는 여전히 거기에있다 : ( –