Create An HTML Browser Using the JEditorPane Component - Java Swing

Java examples for Swing:JEditorPane

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Description

Create An HTML Browser Using the JEditorPane Component

Demo Code

import java.awt.BorderLayout;
import java.awt.Container;
import java.beans.PropertyChangeEvent;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.event.HyperlinkEvent;

public class Main extends JFrame {
  JLabel urlLabel = new JLabel("URL:");
  JTextField urlTextField = new JTextField(40);
  JButton urlGoButton = new JButton("Go");
  JEditorPane editorPane = new JEditorPane();
  JLabel statusLabel = new JLabel("Ready");

  public Main(String title) {
    super(title);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = this.getContentPane();
    Box urlBox = this.getURLBox();
    Box editorPaneBox = this.getEditPaneBox();

    contentPane.add(urlBox, BorderLayout.NORTH);
    contentPane.add(editorPaneBox, BorderLayout.CENTER);
    contentPane.add(statusLabel, BorderLayout.SOUTH);
  }//from   w w w  .  ja  v a2s .co  m

  private Box getURLBox() {
    Box urlBox = Box.createHorizontalBox();
    urlBox.add(urlLabel);
    urlBox.add(urlTextField);
    urlBox.add(urlGoButton);

    urlTextField.addActionListener(e -> {
      String urlString = urlTextField.getText();
      go(urlString);
    });
    urlGoButton.addActionListener(e -> go());
    return urlBox;
  }

  private Box getEditPaneBox() {
    editorPane.setEditable(false);
    Box editorBox = Box.createHorizontalBox();
    editorBox.add(new JScrollPane(editorPane));
    editorPane.addHyperlinkListener((HyperlinkEvent event) -> {
      if (event.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
        go(event.getURL());
      } else if (event.getEventType() == HyperlinkEvent.EventType.ENTERED) {
        statusLabel.setText("Please click this link to visit the page");
      } else if (event.getEventType() == HyperlinkEvent.EventType.EXITED) {
        statusLabel.setText("Ready");
      }
    });
    editorPane.addPropertyChangeListener((PropertyChangeEvent e) -> {
      String propertyName = e.getPropertyName();
      if (propertyName.equalsIgnoreCase("page")) {
        URL url = editorPane.getPage();
        urlTextField.setText(url.toExternalForm());
      }
    });

    return editorBox;
  }
  public void go() {
    try {
      URL url = new URL(urlTextField.getText());
      this.go(url);
    } catch (MalformedURLException e) {
      setStatus(e.getMessage());
    }
  }
  public void go(URL url) {
    try {
      editorPane.setPage(url);
      urlTextField.setText(url.toExternalForm());
      setStatus("Ready");
    } catch (IOException e) {
      setStatus(e.getMessage());
    }
  }
  public void go(String urlString) {
    try {
      URL url = new URL(urlString);
      go(url);
    } catch (IOException e) {
      setStatus(e.getMessage());
    }
  }

  private void setStatus(String status) {
    statusLabel.setText(status);
  }

  public static void main(String[] args) {
    Main browser = new Main("HTML Browser");
    browser.setSize(700, 500);
    browser.setVisible(true);

    browser.go("https://www.java2s.com");
  }
}

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