如何从按钮关闭的Java摆动窗口返回值？

如何从按钮关闭的Java摆动窗口返回值？

不要将窗口显示为Jframe，而是将其显示为模式对话框。然后，在不再可见后，主GUI可以查询对象以获取其持有的任何信息。最简单的方法是使用JOptionPane
－如果正确使用，它们就是聪明的小野兽。

这是我的意思的例子。JOptionPane包含使用GridBagLayout显示信息的JPane。

ComplexOptionPane.java：显示主Jframe。

import java.awt.event.*;import javax.swing.*;@SuppressWarnings("serial")public class ComplexOptionPane extends JPanel {   private PlayerEditorPanel playerEditorPanel = new PlayerEditorPanel();   private Jtextarea textarea = new Jtextarea(20, 40);   public ComplexOptionPane() {      add(new JScrollPane(textarea));      add(new JButton(new AbstractAction("Get Player Information") {         @Override         public void actionPerformed(ActionEvent arg0) { int result = JOptionPane.showConfirmDialog(null, playerEditorPanel,       "Edit Player", JOptionPane.OK_CANCEL_OPTION,       JOptionPane.PLAIN_MESSAGE); if (result == JOptionPane.OK_OPTION) {    for (PlayerEditorPanel.FieldTitle fieldTitle :        PlayerEditorPanel.FieldTitle.values()) {       textarea.append(String.format("%10s: %s%n", fieldTitle.getTitle(),  playerEditorPanel.getFieldText(fieldTitle)));    } }         }      }));   }   private static void createAndShowGui() {      ComplexOptionPane mainPanel = new ComplexOptionPane();      Jframe frame = new Jframe("ComplexOptionPane");      frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);      frame.getContentPane().add(mainPanel);      frame.pack();      frame.setLocationByPlatform(true);      frame.setVisible(true);   }   public static void main(String[] args) {      SwingUtilities.invokeLater(new Runnable() {         public void run() { createAndShowGui();         }      });   }}

PlayerEditorPanel.java，它保存在JOptionPane中显示的JPanel

import java.awt.*;import java.util.HashMap;import java.util.Map;import javax.swing.*;@SuppressWarnings("serial")class PlayerEditorPanel extends JPanel {   enum FieldTitle {      NAME("Name"), SPEED("Speed"), STRENGTH("Strength");      private String title;      private FieldTitle(String title) {         this.title = title;      }      public String getTitle() {         return title;      }   };   private static final Insets WEST_INSETS = new Insets(5, 0, 5, 5);   private static final Insets EAST_INSETS = new Insets(5, 5, 5, 0);   private Map<FieldTitle, JTextField> fieldMap = new HashMap<FieldTitle, JTextField>();   public PlayerEditorPanel() {      setLayout(new GridBagLayout());      setBorder(BorderFactory.createCompoundBorder( BorderFactory.createTitledBorder("Player Editor"), BorderFactory.createEmptyBorder(5, 5, 5, 5)));      GridBagConstraints gbc;      for (int i = 0; i < FieldTitle.values().length; i++) {         FieldTitle fieldTitle = FieldTitle.values()[i];         gbc = createGbc(0, i);         add(new JLabel(fieldTitle.getTitle() + ":", JLabel.LEFT), gbc);         gbc = createGbc(1, i);         JTextField textField = new JTextField(10);         add(textField, gbc);         fieldMap.put(fieldTitle, textField);      }   }   private GridBagConstraints createGbc(int x, int y) {      GridBagConstraints gbc = new GridBagConstraints();      gbc.gridx = x;      gbc.gridy = y;      gbc.gridwidth = 1;      gbc.gridheight = 1;      gbc.anchor = (x == 0) ? GridBagConstraints.WEST : GridBagConstraints.EAST;      gbc.fill = (x == 0) ? GridBagConstraints.BOTH : GridBagConstraints.HORIZONTAL;      gbc.insets = (x == 0) ? WEST_INSETS : EAST_INSETS;      gbc.weightx = (x == 0) ? 0.1 : 1.0;      gbc.weighty = 1.0;      return gbc;   }   public String getFieldText(FieldTitle fieldTitle) {      return fieldMap.get(fieldTitle).getText();   }}