//EditDialog.java//提供新增，編輯，刪除記錄的界面import java.awt.*;import javax.swing.*;import javax.swing.border.*;import java.awt.event.*;public class EditDialog extends JDialog {  JPanel panel1 = new JPanel();  BorderLayout borderLayout1 = new BorderLayout();  JPanel jPanel1 = new JPanel();  JPanel jPanel2 = new JPanel();  JPanel jPanel3 = new JPanel();  GridLayout gridLayout1 = new GridLayout(0,1);  JLabel jLabel1 = new JLabel();  JLabel jLabel2 = new JLabel();  JLabel jLabel3 = new JLabel();  GridLayout gridLayout2 = new GridLayout(0,1);  JButton btCancel = new JButton();  JButton btOK = new JButton();  JTextField tfDescription = new JTextField();  JTextField tfArea = new JTextField();  JTextField tfFormula = new JTextField();  Border border1;  Border border2;  Floor floor;  //最后返回的時候，不該修改傳入的對象，應該新生成對象傳回，這個是結果對象  Floor floorInfo = new Floor();  boolean isOK = false;  //為了在不同的情況下顯示不同的對話框標題，所以生成標題數組  final static String[] TITLES = new String[3];  //定義對話框可能進行的操作  public final static int NEW_OPERATION =0;  public final static int EDIT_OPERATION=1;  public final static int DELETE_OPERATION=2;  //當前的對話框的操作狀態  int currentOperation = NEW_OPERATION;  static{    TITLES[NEW_OPERATION] = "New record";    TITLES[EDIT_OPERATION] = "Edit record";    TITLES[DELETE_OPERATION] = "Delete record ?";  }  public EditDialog(Frame frame, String title, boolean modal) {    super(frame, title, modal);    try {      jbInit();      pack();    }    catch(Exception ex) {      ex.printStackTrace();    }  }  public EditDialog() {    this(null, "", false);  }  void jbInit() throws Exception {    border1 = BorderFactory.createEmptyBorder(20,20,20,20);    border2 = BorderFactory.createEmptyBorder(10,0,0,0);    panel1.setLayout(borderLayout1);    jPanel1.setLayout(gridLayout1);    gridLayout1.setRows(0);    gridLayout1.setColumns(1);    jLabel1.setMinimumSize(new Dimension(20, 18));    jLabel1.setPreferredSize(new Dimension(20, 18));    jLabel1.setText("Description:");    jLabel2.setMinimumSize(new Dimension(20, 18));    jLabel2.setPreferredSize(new Dimension(20, 18));    jLabel2.setText("Area:");    jLabel3.setMinimumSize(new Dimension(20, 18));    jLabel3.setPreferredSize(new Dimension(20, 18));    jLabel3.setText("Formula:");    jPanel2.setLayout(gridLayout2);    btCancel.setText("Cancel");    btCancel.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        btCancel_actionPerformed(e);      }    });    btOK.setText("OK");    btOK.addActionListener(new java.awt.event.ActionListener() {      public void actionPerformed(ActionEvent e) {        btOK_actionPerformed(e);      }    });    gridLayout2.setRows(0);    gridLayout2.setColumns(1);    tfDescription.setMinimumSize(new Dimension(120, 22));    tfDescription.setPreferredSize(new Dimension(120, 22));    tfFormula.setMinimumSize(new Dimension(120, 22));    tfFormula.setPreferredSize(new Dimension(120, 22));    tfArea.setMinimumSize(new Dimension(120, 22));    tfArea.setPreferredSize(new Dimension(120, 22));    panel1.setBorder(border1);    panel1.setMinimumSize(new Dimension(250, 170));    panel1.setPreferredSize(new Dimension(250, 170));    jPanel3.setBorder(border2);    getContentPane().add(panel1);    panel1.add(jPanel1,  BorderLayout.CENTER);    jPanel1.add(jLabel1, null);    jPanel1.add(jLabel3, null);    jPanel1.add(jLabel2, null);    panel1.add(jPanel2,  BorderLayout.EAST);    jPanel2.add(tfDescription, null);    jPanel2.add(tfFormula, null);    jPanel2.add(tfArea, null);    panel1.add(jPanel3,  BorderLayout.SOUTH);    jPanel3.add(btOK, null);    jPanel3.add(btCancel, null);  }  /**   *  初始化對話框狀態，在顯示前必須被調用。   *  @param operation - 當前的操作，可以是刪除新增或編輯   *  @param floor - 用來進行操作的Floor對象   */  void initDialog(int operation,Floor floor){    currentOperation = operation;    this.floor = floor;    if (currentOperation == NEW_OPERATION){      this.floor = new Floor();    }    updateGUI();  }  /**   * 將界面使用Floor對象進行更新   */  void updateGUI(){    this.setTitle(TITLES[currentOperation]);    tfDescription.setText(floor.getDescription());    tfFormula.setText(floor.getFormula());    tfArea.setText(floor.getArea()+"");    if (currentOperation == DELETE_OPERATION){      tfDescription.setEnabled(false);      tfFormula.setEnabled(false);      tfArea.setEnabled(false);    }  }  /**   * 獲得當前界面上的信息，并將信息回寫到結果對象里面   */  void getGUIInfo(){    floorInfo.setDescription(tfDescription.getText());    floorInfo.setFormula(tfFormula.getText());    double area =0;    try {      String s = tfArea.getText();      area = Double.parseDouble(s);    }    catch (Exception ex) {      System.out.println("Area is not a double");    }    floorInfo.setArea(area);  }  void btOK_actionPerformed(ActionEvent e) {    doOK();  }  void btCancel_actionPerformed(ActionEvent e) {    dispose();  }  //用戶按了OK按鈕后進行的操作  void doOK(){    double area;    String s = tfArea.getText();    try {      area = Double.parseDouble(s);    }    catch (Exception ex) {      JOptionPane.showMessageDialog(this,"Invalid input !","Warning",JOptionPane.WARNING_MESSAGE);      return;    }    getGUIInfo();    isOK = true;    dispose();  }  //獲得用戶操作過后的結果對象，在刪除操作中無用  Floor getUpdatedFloor(){    return floorInfo;  }}