什么事java堆栈的接口_javaJavaSwing中具有自定义事件的接口后的.class堆栈内存溢出...

我正在学习Java Swing&＃xff0c;并且发现了使用MVC和Observer模式的关于Swing的高级代码。 这对我来说非常困难&＃xff0c;我试图理解它。 我有两个问题&＃xff1a;

DetailListener.class到底是什么&＃xff1f; 这是我第一次在接口后使用.class。 我试图搜索有关“ .class语法”的stackoverflow&＃xff0c;但我发现它可以在使用一个类后使用&＃xff0c;但是我仍然不了解它在这种情况下的作用。

方法fireDetailEvent()到底是什么&＃xff1f;

提前致谢&＃xff01;

import javax.swing.JFrame;

import javax.swing.SwingUtilities;

public class App {

public static void main(String args[]) {

SwingUtilities.invokeLater(new Runnable() {

&＃64;Override

public void run() {

JFrame frame &＃61; new MainFrame("Hello world Swing");

frame.setSize(500, 400);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

});

}

}

大型机

import java.awt.BorderLayout;

import java.awt.Container;

import javax.swing.JFrame;

import javax.swing.JTextArea;

public class MainFrame extends JFrame {

private JTextArea textArea;

public MainFrame(String title) {

super(title);

Container c &＃61; getContentPane();

c.setLayout(new BorderLayout());

textArea &＃61; new JTextArea();

DetailsPanel detailsPanel &＃61; new DetailsPanel();

detailsPanel.addDetailListener(new DetailListener() {

public void detailEventOccurred(DetailEvent event) {

String text &＃61; event.getText();

textArea.append(text);

}

});

c.add(textArea, BorderLayout.CENTER);

c.add(detailsPanel, BorderLayout.WEST);

}

}

DetailsPanel

import java.awt.Dimension;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.event.EventListenerList;

public class DetailsPanel extends JPanel {

private static final long serialVersionUID &＃61; -5115286206114930420L;

private EventListenerList listenerList &＃61; new EventListenerList();

public DetailsPanel() {

Dimension size &＃61; getPreferredSize();

size.width &＃61; 250;

setPreferredSize(size);

setBorder(BorderFactory.createTitledBorder("Personal details"));

JLabel nameLabel &＃61; new JLabel("Name:");

JLabel occupationLabel &＃61; new JLabel("Occupation:");

JTextField nameField &＃61; new JTextField(10);

JTextField occupationField &＃61; new JTextField(10);

JButton addBtn &＃61; new JButton("Add");

setLayout(new GridBagLayout());

GridBagConstraints gc &＃61; new GridBagConstraints();

// First column /

gc.anchor &＃61; GridBagConstraints.LINE_END;

gc.weightx &＃61; 0.5;

gc.weighty &＃61; 0.5;

gc.gridx &＃61; 0;

gc.gridy &＃61; 0;

add(nameLabel, gc);

gc.gridy &＃61; 1;

add(occupationLabel, gc);

// Second column /

gc.anchor &＃61; GridBagConstraints.LINE_START;

gc.gridx &＃61; 1;

gc.gridy &＃61; 0;

add(nameField, gc);

gc.gridy &＃61; 1;

add(occupationField, gc);

// Final row /

gc.anchor &＃61; GridBagConstraints.FIRST_LINE_START;

gc.weightx &＃61; 10;

gc.weighty &＃61; 10;

gc.gridy &＃61; 2;

add(addBtn, gc);

addBtn.addActionListener(new ActionListener() {

&＃64;Override

public void actionPerformed(ActionEvent e) {

String name &＃61; nameField.getText();

String occupation &＃61; occupationField.getText();

String text &＃61; name &＃43; ": " &＃43; occupation &＃43; "\n";

System.out.println(text);

fireDetailEvent(new DetailEvent(this, text));

}

});

}

public void fireDetailEvent(DetailEvent event) {

Object[] listeners &＃61; listenerList.getListenerList();

for (int i &＃61; 0; i

if (listeners[i] &＃61;&＃61; DetailListener.class) {

((DetailListener)listeners[i&＃43;1]).detailEventOccurred(event);

}

}

}

public void addDetailListener(DetailListener listener) {

listenerList.add(DetailListener.class, listener);

}

public void removeDetailListener(DetailListener listener) {

listenerList.remove(DetailListener.class, listener);

}

}

DetailListener

import java.util.EventListener;

public interface DetailListener extends EventListener {

public void detailEventOccurred(DetailEvent event);

}

DetailEvent

import java.util.EventObject;

public class DetailEvent extends EventObject {

private String text;

public DetailEvent(Object source, String text) {

super(source);

this.text &＃61; text;

}

public String getText() {

return text;

}

}