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java浏览器代码 java script浏览器( 四 )

IT技术浏览器


JLabel label=new JLabel ("地址");
JButton button=new JButton ("转向");
Box adress=Box.createHorizontalBox ();
//ArrayList对象 ， 用来存放历史地址
private ArrayList history=new ArrayList();
//整型变量，表示历史地址的访问顺序
private int historyIndex;
/**
**构造函数
**初始化图形用户界面
*/
public WebBrowser(){
setTitle ("网页浏览器");
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//为jEditorPane1添加事件侦听
jEditorPane1.addHyperlinkListener (this);
//为组件fileMenu设置热键‘F’
fileMenu.setMnemonic('F');
saveAsItem.setMnemonic ('S');
//为“另存为”组件设置快捷键为ctrl+s
saveAsItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_S,InputEvent.CTRL_MASK));
exitItem.setMnemonic('Q');
exitItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_E,InputEvent.CTRL_MASK));
//将菜单项saveAsItem加入到菜单组fileMenu中
fileMenu.add (saveAsItem);
//在菜单项中添加隔离
fileMenu.addSeparator ();
fileMenu.add (exitItem);
backItem.setMnemonic ('B');
backItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_Z,InputEvent.CTRL_MASK));
forwardItem.setMnemonic('D');
forwardItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_P,InputEvent.CTRL_MASK));
editMenu.setMnemonic('E');
editMenu.add (backItem);
editMenu.add (forwardItem);
viewMenu.setMnemonic('V');
fullscreenItem.setMnemonic('U');
fullscreenItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_U,InputEvent.CTRL_MASK));
sourceItem.setMnemonic('C');
sourceItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_C,InputEvent.CTRL_MASK));
reloadItem.setMnemonic('R');
reloadItem.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_R,InputEvent.CTRL_MASK));
Container contentPane=getContentPane ();
//设置大小
scrollPane.setPreferredSize(new Dimension(100,500));
contentPane.add (scrollPane, BorderLayout.SOUTH);
//在工具栏中添加按钮组件
toolBar.add(picSave);
toolBar.addSeparator();
toolBar.add(picBack);
toolBar.add(picForward);
toolBar.addSeparator();
toolBar.add(picView);
toolBar.addSeparator();
toolBar.add(picExit);
contentPane.add (bar,BorderLayout.CENTER);
contentPane.add(toolBar,BorderLayout.NORTH);
viewMenu.add (fullscreenItem);
viewMenu.add (sourceItem);
viewMenu.addSeparator ();
viewMenu.add (reloadItem);
jMenuBar1.add (fileMenu);
jMenuBar1.add (editMenu);
jMenuBar1.add (viewMenu);
setJMenuBar (jMenuBar1);
adress.add (label);
adress.add (jurl);
adress.add (button);
bar.add (adress);
//为组件添加事件监听
saveAsItem.addActionListener(this);
picSave.addActionListener(this);
exitItem.addActionListener(this);
picExit.addActionListener(this);
backItem.addActionListener(this);
picBack.addActionListener(this);
forwardItem.addActionListener(this);
picForward.addActionListener(this);
fullscreenItem.addActionListener(this);
sourceItem.addActionListener(this);
picView.addActionListener(this);
reloadItem.addActionListener(this);
button.addActionListener(this);
jurl.addActionListener(this);
}
/**
**实现监听器接口的actionPerformed函数
*/
public void actionPerformed(ActionEvent e) {
String url = "";
//点击转向按钮
if (e.getSource() == button){
//获得地址栏的内容
url=jurl.getText ();
//url不为“” ， 并且以“http://”开头
if(url.length ()0url.startsWith ("http://")){
try {
//JEditorPane组件显示url的内容链接

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