我正在编写一个程序，并且在此框架中有1个带有JDesktopPane的JFrame，我打开了两个JInternalFrame，我想在这两个JInternalFrame之间传递数据，但要传递JTextField。
我只是传递数据，但它不会更新我要显示的JInternalFrame。但是，如果我选择再次打开，它将向我显示数据。
请帮我！
谢谢
在这个JInternalFrame 2中，我将数据发送到了另一个JInternalFrame 1
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String word = jTxtIDACA.getText();
DatosPersonales frame = new DatosPersonales();
frame.getData(word);
frame.setVisible(true);
this.getDesktopPane().add(frame);
this.dispose();
}
这是JInternalFrame 1，我有
public void getData(String word){
initComponents();
this.word = word;
jTxtIDACA.setText(word);
}
最佳答案
基本思想是您需要某种模型，该模型可以保存数据并在模型以某种方式更改时使用Observer Pattern向相关方提供通知。
然后，两个JInternalFrames可以共享该模型，一个可以更新它，另一个可以监视它的更改（严格来说，这种关系可以双向工作，但我们暂时不做介绍）。 。
现在，因为我永远不知道人们会喜欢什么或如何使用该模型，所以我总是从interface开始，并提供abstract实现和某种我认为需要的默认实现...。
public interface FruitBowl {
public void addFruit(String fruit);
public void removeFruit(String fruit);
public List<String> getFruit();
public void addFruitBowlListener(FruitBowlListener listener);
public void removeFruitBowlListener(FruitBowlListener listener);
}
public abstract class AbstractFruitBowl implements FruitBowl {
private EventListenerList listenerList;
public AbstractFruitBowl() {
}
protected EventListenerList getEventListenerList() {
if (listenerList == null) {
listenerList = new EventListenerList();
}
return listenerList;
}
@Override
public void addFruitBowlListener(FruitBowlListener listener) {
getEventListenerList().add(FruitBowlListener.class, listener);
}
@Override
public void removeFruitBowlListener(FruitBowlListener listener) {
getEventListenerList().remove(FruitBowlListener.class, listener);
}
protected void fireFruitAdded(String fruit) {
FruitBowlListener[] listeners = getEventListenerList().getListeners(FruitBowlListener.class);
if (listeners.length > 0) {
FruitBowlEvent evt = new FruitBowlEvent(this, fruit);
for (FruitBowlListener listener : listeners) {
listener.fruitAdded(evt);
}
}
}
protected void fireFruitRemoved(String fruit) {
FruitBowlListener[] listeners = getEventListenerList().getListeners(FruitBowlListener.class);
if (listeners.length > 0) {
FruitBowlEvent evt = new FruitBowlEvent(this, fruit);
for (FruitBowlListener listener : listeners) {
listener.fruitRemoved(evt);
}
}
}
}
public class DefaultFruitBowl extends AbstractFruitBowl {
private List<String> fruits;
public DefaultFruitBowl() {
fruits = new ArrayList<>(25);
}
@Override
public void addFruit(String fruit) {
fruits.add(fruit);
fireFruitAdded(fruit);
}
@Override
public void removeFruit(String fruit) {
fruits.remove(fruit);
fireFruitRemoved(fruit);
}
@Override
public List<String> getFruit() {
return Collections.unmodifiableList(fruits);
}
}
接下来，我们需要通过使用侦听器来定义观察者模式协定。
public class FruitBowlEvent extends EventObject {
private String fruit;
public FruitBowlEvent(FruitBowl fruitBowl, String fruit) {
super(fruitBowl);
this.fruit = fruit;
}
public FruitBowl getFruitBowl() {
return (FruitBowl)getSource();
}
public String getFruit() {
return fruit;
}
}
public interface FruitBowlListener extends EventListener {
public void fruitAdded(FruitBowlEvent evt);
public void fruitRemoved(FruitBowlEvent evt);
}
接下来，我们定义用户界面...
public class TestModel {
public static void main(String[] args) {
new TestModel();
}
public TestModel() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
FruitBowl fb = new DefaultFruitBowl();
JDesktopPane dp = new JDesktopPane() {
@Override
public Dimension getPreferredSize() {
return new Dimension(400, 200);
}
};
JInternalFrame manager = new JInternalFrame("Fruit Bowl Manager", true, true, true, true);
manager.add(new FruitBowelManagerPane(fb));
manager.setVisible(true);
manager.setBounds(0, 0, 200, 200);
JInternalFrame monitor = new JInternalFrame("Fruit Bowl Monitor", true, true, true, true);
monitor.add(new FruitBowelMonitorPane(fb));
monitor.setVisible(true);
monitor.setBounds(200, 0, 200, 200);
dp.add(manager);
dp.add(monitor);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(dp);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public abstract class AbstractFruitPane extends JPanel {
private FruitBowl fruitBowl;
public AbstractFruitPane(FruitBowl fruitBowl) {
this.fruitBowl = fruitBowl;
}
public FruitBowl getFruitBowl() {
return fruitBowl;
}
}
public class FruitBowelManagerPane extends AbstractFruitPane {
private String[] fruits = {"Banana", "Strewberry", "Pear", "Peach", "Orange"};
private JButton giver;
private JButton taker;
public FruitBowelManagerPane(FruitBowl fruitBowl) {
super(fruitBowl);
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = 1;
giver = new JButton("Add fruit");
taker = new JButton("Remove fruit");
taker.setEnabled(false);
giver.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String fruit = fruits[(int)(fruits.length * Math.random())];
getFruitBowl().addFruit(fruit);
taker.setEnabled(true);
}
});
taker.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
List<String> fruits = getFruitBowl().getFruit();
String eat = fruits.get((int)(fruits.size() * Math.random()));
getFruitBowl().removeFruit(eat);
if (getFruitBowl().getFruit().isEmpty()) {
taker.setEnabled(false);
}
}
});
add(giver, gbc);
add(taker, gbc);
}
}
public class FruitBowelMonitorPane extends AbstractFruitPane {
private JLabel label;
public FruitBowelMonitorPane(FruitBowl fruitBowl) {
super(fruitBowl);
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
label = new JLabel("I'm watching you...");
add(label);
fruitBowl.addFruitBowlListener(new FruitBowlListener() {
@Override
public void fruitAdded(FruitBowlEvent evt) {
label.setText("You added " + evt.getFruit());
}
@Override
public void fruitRemoved(FruitBowlEvent evt) {
if (getFruitBowl().getFruit().isEmpty()) {
label.setText("You ate all the fruit!");
} else {
label.setText("You ate my " + evt.getFruit());
}
}
});
}
}
}
更新了合并示例
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.EventListener;
import java.util.EventObject;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.EventListenerList;
public class TestModel {
public static void main(String[] args) {
new TestModel();
}
public TestModel() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
FruitBowl fb = new DefaultFruitBowl();
JDesktopPane dp = new JDesktopPane() {
@Override
public Dimension getPreferredSize() {
return new Dimension(400, 200);
}
};
JInternalFrame manager = new JInternalFrame("Fruit Bowl Manager", true, true, true, true);
manager.add(new FruitBowelManagerPane(fb));
manager.setVisible(true);
manager.setBounds(0, 0, 200, 200);
JInternalFrame monitor = new JInternalFrame("Fruit Bowl Monitor", true, true, true, true);
monitor.add(new FruitBowelMonitorPane(fb));
monitor.setVisible(true);
monitor.setBounds(200, 0, 200, 200);
dp.add(manager);
dp.add(monitor);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(dp);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public abstract class AbstractFruitPane extends JPanel {
private FruitBowl fruitBowl;
public AbstractFruitPane(FruitBowl fruitBowl) {
this.fruitBowl = fruitBowl;
}
public FruitBowl getFruitBowl() {
return fruitBowl;
}
}
public class FruitBowelManagerPane extends AbstractFruitPane {
private String[] fruits = {"Banana", "Strewberry", "Pear", "Peach", "Orange"};
private JButton giver;
private JButton taker;
public FruitBowelManagerPane(FruitBowl fruitBowl) {
super(fruitBowl);
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = 1;
giver = new JButton("Add fruit");
taker = new JButton("Remove fruit");
taker.setEnabled(false);
giver.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String fruit = fruits[(int) (fruits.length * Math.random())];
getFruitBowl().addFruit(fruit);
taker.setEnabled(true);
}
});
taker.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
List<String> fruits = getFruitBowl().getFruit();
String eat = fruits.get((int) (fruits.size() * Math.random()));
getFruitBowl().removeFruit(eat);
if (getFruitBowl().getFruit().isEmpty()) {
taker.setEnabled(false);
}
}
});
add(giver, gbc);
add(taker, gbc);
}
}
public class FruitBowelMonitorPane extends AbstractFruitPane {
private JLabel label;
public FruitBowelMonitorPane(FruitBowl fruitBowl) {
super(fruitBowl);
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
label = new JLabel("I'm watching you...");
add(label);
fruitBowl.addFruitBowlListener(new FruitBowlListener() {
@Override
public void fruitAdded(FruitBowlEvent evt) {
label.setText("You added " + evt.getFruit());
}
@Override
public void fruitRemoved(FruitBowlEvent evt) {
if (getFruitBowl().getFruit().isEmpty()) {
label.setText("You ate all the fruit!");
} else {
label.setText("You ate my " + evt.getFruit());
}
}
});
}
}
public class FruitBowlEvent extends EventObject {
private String fruit;
public FruitBowlEvent(FruitBowl fruitBowl, String fruit) {
super(fruitBowl);
this.fruit = fruit;
}
public FruitBowl getFruitBowl() {
return (FruitBowl) getSource();
}
public String getFruit() {
return fruit;
}
}
public interface FruitBowlListener extends EventListener {
public void fruitAdded(FruitBowlEvent evt);
public void fruitRemoved(FruitBowlEvent evt);
}
public interface FruitBowl {
public void addFruit(String fruit);
public void removeFruit(String fruit);
public List<String> getFruit();
public void addFruitBowlListener(FruitBowlListener listener);
public void removeFruitBowlListener(FruitBowlListener listener);
}
public abstract class AbstractFruitBowl implements FruitBowl {
private EventListenerList listenerList;
public AbstractFruitBowl() {
}
protected EventListenerList getEventListenerList() {
if (listenerList == null) {
listenerList = new EventListenerList();
}
return listenerList;
}
@Override
public void addFruitBowlListener(FruitBowlListener listener) {
getEventListenerList().add(FruitBowlListener.class, listener);
}
@Override
public void removeFruitBowlListener(FruitBowlListener listener) {
getEventListenerList().remove(FruitBowlListener.class, listener);
}
protected void fireFruitAdded(String fruit) {
FruitBowlListener[] listeners = getEventListenerList().getListeners(FruitBowlListener.class);
if (listeners.length > 0) {
FruitBowlEvent evt = new FruitBowlEvent(this, fruit);
for (FruitBowlListener listener : listeners) {
listener.fruitAdded(evt);
}
}
}
protected void fireFruitRemoved(String fruit) {
FruitBowlListener[] listeners = getEventListenerList().getListeners(FruitBowlListener.class);
if (listeners.length > 0) {
FruitBowlEvent evt = new FruitBowlEvent(this, fruit);
for (FruitBowlListener listener : listeners) {
listener.fruitRemoved(evt);
}
}
}
}
public class DefaultFruitBowl extends AbstractFruitBowl {
private List<String> fruits;
public DefaultFruitBowl() {
fruits = new ArrayList<>(25);
}
@Override
public void addFruit(String fruit) {
fruits.add(fruit);
fireFruitAdded(fruit);
}
@Override
public void removeFruit(String fruit) {
fruits.remove(fruit);
fireFruitRemoved(fruit);
}
@Override
public List<String> getFruit() {
return Collections.unmodifiableList(fruits);
}
}
}
关于java - 如何在两个JInternalFrame之间传递数据？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/25841715/