Intermediate Java(35) - Building the GUI

import java.awt.*;

import java.awt.Event.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

import javax.swing.event.*;

public class Read extends JFrame{

private JTextField addressBar;

private JEditorPane display;

//constructor

public Read(){

super("New Browser");

addressBar = new JTextField("enter a URL!");

addressBar.addActionListener(

new ActionListener(){

public void actionPerformed(ActionEvent event){

loadCrap(event.getActionCommand());

}

}

);

add(addressBar, BorderLayout.NORTH);

display = new JEditorPane();

display.setEditable(false); → 不能編輯

display.addHyperlinkListener( →

new HyperlinkListener(){

public void hyperlinkUpdate(HyperlinkEvent event){

if(event.getEventType()==HyperlinkEvent.EventType.ACTIVATED){

loadCrap(event.getURL().toString());

}

}

}

);

}

}

listener的含義

if(event.getEventType()==HyperlinkEvent.EventType.ACTIVATED){ → 如果hyperlink被點擊

loadCrap(event.getURL().toString()); → 這個URL會變成String