I m new to java. 我想把一个浏览器放在一个联合阵线。 我使用JEditorPane显示超文本,但该页面仍然正确显示。 这页显示,但事情已经消失。 我最大的关切是,网页上的 Java光器没有在我的习惯浏览器上显示。 我可能不正确使用JEditorPane。 我的守则是:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;
import java.io.*;

public class Frame1 extends JFrame implements ActionListener
{
    private JEditorPane editorPane;    
    private JTextField addressField;
    private JButton goButton;
    private JLabel label;

    public Frame1() {        
        super("Frame1");
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch(Exception e) {
            System.out.println("Unablet to set look and feel.");
        }

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        label = new JLabel("Enter URL. Must include http://");

        // setup editor pane
        editorPane = new JEditorPane();
        editorPane.setEditable(false);
        URL url = null;
        try {
            url = new URL("http://www.cut-the-knot.org/SimpleGames/FrogsAndToads2d.shtml");
        } catch (MalformedURLException e) {

        }

        if (url != null) {
            try {
                editorPane.setPage(url);
            } catch (IOException e) {
                label.setText("Attempted to read a bad URL: " + url);
            }
        } else {
            label.setText("String specifies an unknown protocol.");
        }

        // put editor pane in a scroll pane
        JScrollPane editorScrollPane = new JScrollPane(editorPane);
        editorScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        editorScrollPane.setPreferredSize(new Dimension(250, 145));
        editorScrollPane.setMinimumSize(new Dimension(10, 10));

        // setup everything in southPanel.
        // southPanel > addressBar + label> addressField + goButton
        addressField = new JTextField(30);
        goButton = new JButton("Go");    
        goButton.addActionListener(this);
        JPanel addressBar = new JPanel();           
        JPanel southPanel = new JPanel(new GridLayout(2, 1));
        addressBar.add(addressField);
        addressBar.add(goButton);
        southPanel.add(addressBar);
        southPanel.add(label);

        // add everything to JFrame
        setLayout(new BorderLayout());        
        add(southPanel, BorderLayout.SOUTH);
        add(editorScrollPane, BorderLayout.CENTER);

        setSize(500, 500);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == goButton) {
            URL url = null;
            try {
                url = new URL(addressField.getText());
            } catch (MalformedURLException murle) {

            }
            if (url != null) {
                try {
                    editorPane.setPage(url);
                } catch (IOException ioe) {
                    label.setText("Attempted to read a bad URL: " + url);
                }
            } else {
                label.setText("String specifies an unknown protocol.");
            }
        }
    }

    public static void main(String[] args) {
        new Frame1();
    }
}