Javs GUI 응용 프로그램 MIGLayout이 표시되지 않습니다.

Question

My Java GUI 응용 프로그램은 Netbeans 8.0에서 MIGLayout을 사용하여 레이아웃 세부 정보가있는 PersonUI.java 클래스의 데이터를 표시하지 않습니다. 프로젝트에있는 모든 파일에는 오류가 없으므로 GUI가 표시되지 않습니다. MIG 레이아웃을 표시하는 데 도움이 될 수 있습니다.

package View; 

import Model.Person; 

import java.awt.*; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.Random; 
import javax.swing.*; 
import javax.swing.border.EtchedBorder; 
import javax.swing.border.TitledBorder; 
import net.miginfocom.swing.MigLayout; 
/** 
/** 
* 
* @author Mbano 
*/import Controller.PersonBean; 
public class PersonUI extends JPanel { 
    private JTextField idField = new JTextField(10); 
    private JTextField fNameField = new JTextField(30); 

private JTextField mNameField, lNameField, emailField, phoneField; 

    private JButton createButton = new JButton("New..."); 
    private JButton updateButton, deleteButton, firstButton, prevButton, nextButton, 
    lastButton; 
private PersonBean bean = new PersonBean(); 

    public PersonUI() { 
     setBorder(new TitledBorder 
     (new EtchedBorder(),"Person Details")); 
     setLayout(new BorderLayout(5, 5)); 
     add(initFields(), BorderLayout.NORTH); 
     add(initButtons(), BorderLayout.CENTER); 
     setFieldData(bean.moveFirst()); 
    } 

    private JPanel initButtons() { 
     JPanel panel = new JPanel(); 
     panel.setLayout(new FlowLayout(FlowLayout.CENTER, 3, 3)); 
     panel.add(createButton); 
     createButton.addActionListener(new ButtonHandler()); 
     //... 
     panel.add(lastButton); 
     lastButton.addActionListener(new ButtonHandler()); 
     return panel; 
    } 

    private JPanel initFields() { 
     JPanel panel = new JPanel(); 
     panel.setLayout(new MigLayout()); 
     panel.add(new JLabel("ID"), "align label"); 
     panel.add(idField, "wrap"); 
     idField.setEnabled(false); 
     panel.add(new JLabel("First Name"), "align label"); 
     panel.add(fNameField, "wrap"); 
     //... 
     panel.add(new JLabel("Phone"), "align label"); 
     panel.add(phoneField, "wrap"); 
     return panel; 
    } 

    private Person getFieldData() { 
     Person p = new Person(); 
     p.setPersonId(Integer.parseInt(idField.getText())); 
     p.setFirstName(fNameField.getText()); 
     p.setMiddleName(mNameField.getText()); 
     p.setLastName(lNameField.getText()); 
     p.setEmail(emailField.getText()); 
     p.setPhone(phoneField.getText()); 
     return p; 
    } 

    private void setFieldData(Person p) { 
     idField.setText(String.valueOf(p.getPersonId())); 
     fNameField.setText(p.getFirstName()); 
     mNameField.setText(p.getMiddleName()); 
     lNameField.setText(p.getLastName()); 
     emailField.setText(p.getEmail()); 
     phoneField.setText(p.getPhone()); 
    } 

    private boolean isEmptyFieldData() { 
     return (fNameField.getText().trim().isEmpty() 
     && mNameField.getText().trim().isEmpty() 
     && lNameField.getText().trim().isEmpty() 
     && emailField.getText().trim().isEmpty() 
     && phoneField.getText().trim().isEmpty()); 
    } 

    private class ButtonHandler implements ActionListener { 
     @Override 
     public void actionPerformed(ActionEvent e) { 
     Person p = getFieldData(); 
     switch (e.getActionCommand()) { 
     case "Save": 
      if (isEmptyFieldData()) { 
       JOptionPane.showMessageDialog(null, 
       "Cannot create an empty record"); 
       return; 
      } 
      if (bean.create(p) != null) 
       JOptionPane.showMessageDialog(null, 
       "New person created successfully."); 
       createButton.setText("New..."); 
       break; 
     case "New...": 
      p.setPersonId(new Random() 
      .nextInt(Integer.MAX_VALUE) + 1); 
      p.setFirstName(""); 
      p.setMiddleName(""); 
      p.setLastName(""); 
      p.setEmail(""); 
      p.setPhone(""); 
      setFieldData(p); 
      createButton.setText("Save"); 
      break; 
     case "Update": 
      if (isEmptyFieldData()) { 
       JOptionPane.showMessageDialog(null, 
       "Cannot update an empty record"); 
       return; 
      } 
      if (bean.update(p) != null) 
       JOptionPane.showMessageDialog(
       null,"Person with ID:" + String.valueOf(p.getPersonId() 
       + " is updated successfully")); 
       break; 
     case "Delete": 
      if (isEmptyFieldData()) { 
       JOptionPane.showMessageDialog(null, 
       "Cannot delete an empty record"); 
       return; 
      } 
      p = bean.getCurrent(); 
      bean.delete(); 
      JOptionPane.showMessageDialog(
       null,"Person with ID:" 
       + String.valueOf(p.getPersonId() 
       + " is deleted successfully")); 
       break; 
     case "First": 
      setFieldData(bean.moveFirst()); break; 
     case "Previous": 
      setFieldData(bean.movePrevious()); break; 
     case "Next": 
      setFieldData(bean.moveNext()); break; 
     case "Last": 
      setFieldData(bean.moveLast()); break; 
     default: 
      JOptionPane.showMessageDialog(null, 
      "invalid command"); 
     } 
     } 
    } 
} 


package View; 
import java.awt.FlowLayout; 
import javax.swing.JFrame; 
/** 
* 
* @author Mbano 
*/ 
public class AppMain { 
    public static void main(String[] args) { 
    JFrame f =new JFrame(); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER)); 
    f.getContentPane().add(new PersonUI()); 
     f.setSize(600, 280); 
     f.setVisible(true); 
} 
} 

Answer 1

콘솔의 예외 사항을 확인하십시오. 디버그 모드에서 레이아웃을 보려면

new MigLayout("debug") 

을 사용해보십시오. 다른 크기의 JPanels에 다른 배경색을 설정하여 크기를 확인할 수도 있습니다.