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    隨筆 - 303  文章 - 883  trackbacks - 0
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    最新評論

    DOS下編譯可能會出問題,可以用命令 [ javac -Xlint:unchecked?WebReader.java?],

    如果不想出錯請用eclipse進行編譯。至于什么原因,下個文章解釋;


    對瀏覽器感興趣的朋友,這是firefox各個版本的程序和源代碼下載FTP地址

    ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/?



    代碼:

    ??1
    ??2//?????WebReader.java???
    ??3??//???This???program???uses???a???JEditorPane???to???display???the???
    ??4??//???contents???of???a???file???on???a???Web???server.???
    ??5????
    ??6??//???Java???core???packages???
    ??7??import???java.awt.*;???
    ??8??import???java.awt.event.*;???
    ??9??import???java.net.*;???
    ?10??import???java.io.*;???
    ?11??import???java.util.*;???
    ?12????
    ?13??//???Java???extension???packages???
    ?14??import???javax.swing.*;???
    ?15??import???javax.swing.event.*;???
    ?16????
    ?17??public???class???WebReader???extends???JFrame???{???
    ?18??private???JTextField???enterField;???
    ?19??private???JEditorPane???contentsArea;???
    ?20??private???JButton???backButton,fwdButton;???
    ?21??private???JPanel???contralPanel;???
    ?22??private???URLList???urllist;???
    ?23????????//???set???up???GUI???
    ?24????????public???WebReader()???
    ?25????????{???
    ?26??????????????super(???"My???Web???Browser"???);???
    ?27????
    ?28????
    ?29??????????????JMenu???fileMenu???=???new???JMenu("File");//set???up???File???menu???ane???its???menu???item???
    ?30??????????????fileMenu.setMnemonic('F');???
    ?31????
    ?32??????????????JMenuItem???exitItem???=???new???JMenuItem("Exit");???
    ?33??????????????exitItem.setMnemonic('X');???
    ?34??????????????exitItem.addActionListener(???
    ?35??????????????new???ActionListener(){???
    ?36??????????????public???void???actionPerformed(ActionEvent???event){???
    ?37??????????????System.exit(0);???
    ?38??????????????}
    ???
    ?39??????????????}
    ???
    ?40??????????????);???
    ?41??????????????fileMenu.add(???exitItem???);???
    ?42????
    ?43??????????????JMenuBar???bar???=???new???JMenuBar();???
    ?44??????????????setJMenuBar(???bar???);???
    ?45??????????????bar.add(???fileMenu???);???
    ?46????
    ?47??????????????JMenu???editMenu???=???new???JMenu("Edit");???
    ?48??????????????editMenu.setMnemonic('E');???
    ?49????
    ?50??????????????JMenuItem???nextItem???=???new???JMenuItem(???"Next"???);???
    ?51??????????????nextItem.setMnemonic(???'N'???);???
    ?52??????????????nextItem.addActionListener(???
    ?53??????????????new???ActionListener(){???
    ?54??????????????public???void???actionPerformed(ActionEvent???event){???
    ?55??????????????System.exit(0);???
    ?56??????????????}
    ???
    ?57??????????????}
    ???
    ?58??????????????);???
    ?59??????????????editMenu.add(???nextItem???);???
    ?60??????????????bar.add(???editMenu???);???
    ?61????
    ?62??????????????Container???container???=???getContentPane();???
    ?63????
    ?64??????????????FlowLayout???lay=new???FlowLayout();???
    ?65??????????????lay.setAlignment(???FlowLayout.LEFT???);???
    ?66????
    ?67??????????????contralPanel???=???new???JPanel();???
    ?68??????????????contralPanel.setLayout(???lay???);???
    ?69????
    ?70??????????????urllist???=???new???URLList();???
    ?71????
    ?72??????????????Icon???back???=???new???ImageIcon(???"back.gif"???);???
    ?73??????????????backButton???=???new???JButton(???"back",back???);???
    ?74??????????????backButton.addActionListener(???
    ?75??????????????new???ActionListener()???
    ?76??????????????{???
    ?77??????????????public???void???actionPerformed(???ActionEvent???event???)???
    ?78??????????????????????????{???
    ?79??????????????????????????String???strback=new???String(???urllist.back()???);???
    ?80??????????????????????????System.out.println(???strback???);???
    ?81??????????????????????????if(???!strback.equals(???"Noop"???)???)???
    ?82??????????????????????????getThePage(???strback???);???
    ?83????????????????????????????
    ?84??????????????????????????}
    ???
    ?85??????????????????}
    ???
    ?86??????????????);???
    ?87??????contralPanel.add(???backButton???);???
    ?88????
    ?89??????????????Icon???fwd???=???new???ImageIcon(???"fwd.gif"???);???
    ?90??????????????fwdButton???=???new???JButton(???"fwd",fwd???);???
    ?91??????????????fwdButton.addActionListener(???
    ?92??????????????new???ActionListener()???
    ?93??????????????{???
    ?94??????????????public???void???actionPerformed(???ActionEvent???event???)???
    ?95??????????????????????????{???
    ?96??????????????????????????String???strfwd=new???String(???urllist.forward()???);???
    ?97??????????????????????????System.out.println(???strfwd???);???
    ?98??????????????????????????if(???!strfwd.equals(???"Noop"???)???)???
    ?99??????????????????????????getThePage(???strfwd???);???
    100????????????????????????????
    101??????????????????????????}
    ???
    102??????????????????}
    ???
    103??????????????);???
    104??????????????contralPanel.add(???fwdButton???);???
    105????
    106??????????????//???create???enterField???and???register???its???listener???
    107??????????????enterField???=???new???JTextField(???"Enter???file???URL???here",24???);???
    108????
    109??????????????enterField.addActionListener(???
    110????
    111????????????????????new???ActionListener()???{???
    112????
    113??????????????????????????//???get???document???specified???by???user???
    114??????????????????????????public???void???actionPerformed(???ActionEvent???event???)???
    115??????????????????????????{???
    116??????????????????????????urllist.push(???event.getActionCommand()???);???
    117??????????????????????????getThePage(???event.getActionCommand()???);???
    118??????????????????????????}
    ???
    119????
    120????????????????????}
    ?????//???end???anonymous???inner???class???
    121????
    122??????????????);???//???end???call???to???addActionListener???
    123????
    124??????????????enterField.addMouseListener(???
    125??????????????new???MouseListener(){???
    126??????????????public???void???mouseClicked(???MouseEvent???e???)???
    127??????????????{???
    128??????????????enterField.selectAll();???
    129??????????????}
    ???
    130????
    131??????????????public???void???mousePressed(???MouseEvent???e???)???
    132??????????????{???
    133??????????????}
    ???
    134????
    135??????????????public???void???mouseReleased(???MouseEvent???e???)???
    136??????????????{???
    137??????????????}
    ???
    138??????????????public???void???mouseEntered(???MouseEvent???e???)???
    139??????????????{???
    140??????????????}
    ???
    141????????????????
    142????????????????
    143??????????????public???void???mouseExited(???MouseEvent???e???)???
    144??????????????{???
    145??????????????}
    ???
    146??????????????}
    ???
    147??????????????);???
    148????
    149??????????????contralPanel.add(???enterField???);???
    150????
    151??????????????container.add(???contralPanel,???BorderLayout.NORTH???);???
    152??????????????//???create???contentsArea???and???register???HyperlinkEvent???listener???
    153??????????????contentsArea???=???new???JEditorPane();???
    154??????????????contentsArea.setEditable(???false???);???
    155????
    156??????????????contentsArea.addHyperlinkListener(???
    157????
    158????????????????????new???HyperlinkListener()???{???
    159????
    160??????????????????????????//???if???user???clicked???hyperlink,???go???to???specified???page???
    161??????????????????????????public???void???hyperlinkUpdate(???HyperlinkEvent???event???)???
    162??????????????????????????{???
    163????????????????????????????????if???(???event.getEventType()???==???
    164??????????????????????????????????????????HyperlinkEvent.EventType.ACTIVATED???)???
    165??????????????????????????????????????????{???
    166??????????????????????????????????????????urllist.push(???event.getURL().toString()???);???
    167??????????????????????????????????????????getThePage(???event.getURL().toString()???);???
    168??????????????????????????????????????????}
    ???
    169??????????????????????????}
    ???
    170????
    171????????????????????}
    ?????//???end???anonymous???inner???class???
    172????
    173??????????????);???//???end???call???to???addHyperlinkListener???
    174????
    175??????????????container.add(?????new???JScrollPane(???contentsArea???)???,???
    176????????????????????BorderLayout.CENTER???);???
    177????
    178??????????????setSize(???1000,???700???);???
    179??????????????setVisible(???true???);???
    180????????}
    ???
    181????
    182????????//???load???document;???change???mouse???cursor???to???indicate???status???
    183????????private???void???getThePage(???String???location???)???
    184????????{???
    185??????????????//???change???mouse???cursor???to???WAIT_CURSOR???
    186??????????????setCursor(???Cursor.getPredefinedCursor(???
    187????????????????????Cursor.WAIT_CURSOR???)???);???
    188????
    189??????????????if(!location.startsWith(???"http://"???))???
    190??????????????location="http://"???+???location;???
    191????
    192??????????????//???load???document???into???contentsArea???and???display???location???in???
    193??????????????//???enterField???
    194??????????????try???{???
    195????????????????????contentsArea.setPage(???location???);???
    196????????????????????enterField.setText(???location???);???
    197??????????????}
    ???
    198????
    199??????????????//???process???problems???loading???document???
    200??????????????catch???(???IOException???ioException???)???{???
    201????????????????????JOptionPane.showMessageDialog(???this,???
    202??????????????????????????"Error???retrieving???specified???URL",???
    203??????????????????????????"Bad???URL",???JOptionPane.ERROR_MESSAGE???);???
    204??????????????}
    ???
    205????
    206??????????????setCursor(???Cursor.getPredefinedCursor(???
    207????????????????????Cursor.DEFAULT_CURSOR???)???);???
    208????????}
    ???
    209????
    210????????//???begin???application???execution???
    211????????public???static???void???main(???String???args[]???)???
    212????????{???
    213??????????????WebReader???application???=???new???WebReader();???
    214????
    215??????????????application.setDefaultCloseOperation(???
    216????????????????????JFrame.EXIT_ON_CLOSE???);???
    217????
    218????????}
    ???
    219????
    220??}
    ?????//???end???class???WebReader???
    221??class???URLList???
    222??{???
    223??private???int???now???=???0;???
    224??private???Vector???vector;???
    225????
    226??URLList()???
    227??{???
    228??vector???=???new???Vector(???1???);???
    229??}
    ???
    230??public???void???push(String???url)???
    231??{???
    232??vector.add(url);???
    233??now???=???vector.size()-1;???
    234??}
    ???
    235????
    236??public???String???back()???
    237??{???
    238??System.out.println(???"back?????"???+???now???);???
    239??if(???now???==???0???)???
    240??return(???"Noop"???);???
    241??else???
    242??{???
    243??now--;???
    244??System.out.println(???"back----"???+???now???);???
    245??return(???(String)vector.get(???now???));???
    246??}
    ???
    247??}
    ???
    248????
    249??public???String???forward()???
    250??{???
    251??System.out.println(???"fwd"???+???now???+???vector.size()???);???
    252??if(???(???vector.size()???==???0???)???||???(???now???==???(???vector.size()-1???)???)???)???
    253??return(???"Noop"???);???
    254??else???
    255??{???
    256??now++;???
    257??System.out.println(???"fwd+++"???+???now???);???
    258??return(???(String)vector.get(???now???));???
    259??}
    ???
    260??}
    ???
    261??public???int???getnow()???
    262??{???
    263??return???now;???
    264??}
    ???
    265??}
    ?


    地震讓大伙知道:居安思危,才是生存之道。
    posted on 2007-03-09 08:22 小尋 閱讀(787) 評論(0)  編輯  收藏 所屬分類: j2se/j2ee/j2me
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