本文实例为大家分享了java仿windows记事本的具体代码，供大家参考，具体内容如下
先上截图：
源代码：
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import java.awt.*;import javax.swing.*;import javax.swing.filechooser.filenameextensionfilter;import javax.swing.undo.undomanager;import java.awt.event.*;import java.io.*;/** * * @author cjbi@outlook.com * @created 2015年7月6日 上午11:22:24 */public class jnotepad extends jframe implements actionlistener { jmenubar menubar = new jmenubar(); jmenu file = new jmenu("文件(f)"); jmenu edit = new jmenu("编辑(e)"); jmenu format = new jmenu("格式(o)"); jmenu help = new jmenu("帮助(h)"); jmenuitem create = new jmenuitem("新建"); jmenuitem open = new jmenuitem("打开..."); jmenuitem save = new jmenuitem("保存"); jmenuitem saveas = new jmenuitem("另存为..."); jmenuitem exit = new jmenuitem("退出"); jmenuitem undo = new jmenuitem("撤销"); jmenuitem cut = new jmenuitem("剪切"); jmenuitem copy = new jmenuitem("复制"); jmenuitem paste = new jmenuitem("粘贴"); jmenuitem findrep = new jmenuitem("查找替换"); jmenuitem selectall = new jmenuitem("全选"); jmenuitem font = new jmenuitem("字体"); jmenuitem about = new jmenuitem("关于"); jmenuitem cut2 = new jmenuitem("剪切(x)"); jmenuitem copy2 = new jmenuitem("复制(c)"); jmenuitem paste2 = new jmenuitem("粘贴(v)"); jmenuitem selectall2 = new jmenuitem("全选(a)"); public static jtextarea textarea = new jtextarea(); undomanager um = new undomanager(); jscrollpane scroll = new jscrollpane(textarea, scrollpaneconstants.vertical_scrollbar_always, scrollpaneconstants.horizontal_scrollbar_as_needed); jpopupmenu popup = new jpopupmenu(); string pathselect; // 获取屏幕尺寸 dimension screensize = toolkit.getdefaulttoolkit().getscreensize(); public jnotepad() { // 此处定义键盘快捷键 // menubar file.setmnemonic(keyevent.vk_f); edit.setmnemonic(keyevent.vk_e); format.setmnemonic(keyevent.vk_o); help.setmnemonic(keyevent.vk_h); // menuitem create.setaccelerator(keystroke.getkeystroke(keyevent.vk_n, actionevent.ctrl_mask)); open.setaccelerator(keystroke.getkeystroke(keyevent.vk_o, actionevent.ctrl_mask)); save.setaccelerator(keystroke.getkeystroke(keyevent.vk_s, actionevent.ctrl_mask)); undo.setaccelerator(keystroke.getkeystroke(keyevent.vk_z, actionevent.ctrl_mask)); cut.setaccelerator(keystroke.getkeystroke(keyevent.vk_x, actionevent.ctrl_mask)); copy.setaccelerator(keystroke.getkeystroke(keyevent.vk_c, actionevent.ctrl_mask)); paste.setaccelerator(keystroke.getkeystroke(keyevent.vk_v, actionevent.ctrl_mask)); findrep.setaccelerator(keystroke.getkeystroke(keyevent.vk_f, actionevent.ctrl_mask)); selectall.setaccelerator(keystroke.getkeystroke(keyevent.vk_a, actionevent.ctrl_mask)); // 事件监听者 save.addactionlistener(this); create.addactionlistener(this); open.addactionlistener(this); saveas.addactionlistener(this); exit.addactionlistener(this); undo.addactionlistener(this); cut.addactionlistener(this); copy.addactionlistener(this); paste.addactionlistener(this); selectall.addactionlistener(this); font.addactionlistener(this); about.addactionlistener(this); cut2.addactionlistener(this); copy2.addactionlistener(this); paste2.addactionlistener(this); selectall2.addactionlistener(this); findrep.addactionlistener(this); // 设置撤销文本的管理器 textarea.getdocument().addundoableeditlistener(um); textarea.setfont(format.font); // 文件 file.add(create); file.add(open); file.add(save); file.add(saveas); file.addseparator(); file.add(exit); // 编辑 edit.add(undo); edit.addseparator(); edit.add(cut); edit.add(copy); edit.add(paste); edit.addseparator(); edit.add(findrep); edit.addseparator(); edit.add(selectall); // 格式 format.add(font); // 帮助 help.add(about); // 菜单栏 menubar.add(file); menubar.add(edit); menubar.add(format); menubar.add(help); // 右键菜单 popup.add(cut2); popup.add(copy2); popup.add(paste2); popup.addseparator(); popup.add(selectall2); // 添加到文本域容器 textarea.add(popup); // 匿名内部类监听器右键动作 textarea.addmouselistener(new mouseadapter() { public void mousereleased(mouseevent e) { if (e.getbutton() == mouseevent.button3) { popup.show(textarea, e.getx(), e.gety()); } } }); // 边界布局 this.add(menubar, borderlayout.north); this.add(scroll, borderlayout.center); this.settitle("记事本"); this.setsize(500, 400); this.setlocationrelativeto(null); this.seticonimage(new imageicon(this.getclass().getresource("/icon/notepad.png")).getimage());//图标放在源目录的icon文件夹 this.setdefaultcloseoperation(jframe.dispose_on_close); this.setvisible(true); } // 重写actionperformed @override public void actionperformed(actionevent e) { // event对象发生源 if (e.getsource() == open) { jfilechooser chooser = new jfilechooser(); filenameextensionfilter filter = new filenameextensionfilter("文本文档(*.txt)", "txt"); chooser.setfilefilter(filter); chooser.setdialogtitle("文件打开"); chooser.showopendialog(null); chooser.setvisible(true); try { pathselect = chooser.getselectedfile().getpath(); filereader wjl = new filereader(pathselect); bufferedreader hcl = new bufferedreader(wjl); string s = "", zfc = ""; while ((s = hcl.readline()) != null) { zfc += (s + "\n"); } textarea.settext(zfc); } catch (exception e1) { } } if (e.getsource() == saveas) {// 另存为 jfilechooser chooser = new jfilechooser(); filenameextensionfilter filter = new filenameextensionfilter("文本文档(*.txt)", "txt"); chooser.setfilefilter(filter); chooser.setdialogtitle("另存为"); chooser.showsavedialog(null); chooser.setvisible(true); printstream ps; try { string select = chooser.getselectedfile().getpath(); ps = new printstream(select); system.setout(ps); system.out.println(this.textarea.gettext()); } catch (exception e1) { } } if (e.getsource() == save && (pathselect == null)) {// 保存 jfilechooser chooser = new jfilechooser(); chooser.setdialogtitle("保存"); chooser.showsavedialog(null); chooser.setvisible(true); printstream ps; try { pathselect = chooser.getselectedfile().getpath(); ps = new printstream(pathselect); system.setout(ps); system.out.println(this.textarea.gettext()); } catch (exception e1) { } } else if (e.getsource() == save && !(pathselect == null)) { printstream ps; try { ps = new printstream(pathselect); system.setout(ps); system.out.println(this.textarea.gettext()); } catch (filenotfoundexception e1) { } } if (e.getsource() == create) { textarea.settext(""); pathselect = null; } if (e.getsource() == exit) { system.exit(0); } if (e.getsource() == undo) { if (um.canundo()) { um.undo(); } } if (e.getsource() == cut || e.getsource() == cut2) { textarea.cut(); } else if (e.getsource() == copy || e.getsource() == copy2) { textarea.copy(); } else if (e.getsource() == paste || e.getsource() == paste2) { textarea.paste(); } else if (e.getsource() == findrep) { new findandreplace(textarea); } else if (e.getsource() == selectall || e.getsource() == selectall2) { textarea.selectall(); } if (e.getsource() == font) { new format(textarea); } if (e.getsource() == about) { new about(); } } public static void main(string[] args) { new jnotepad(); }}class findandreplace extends jdialog implements actionlistener {// 查找和替换 jlabel findlabel = new jlabel("查找内容："); jlabel replabel = new jlabel(" 替换为："); jtextfield findtf = new jtextfield(8); jtextfield reptf = new jtextfield(8); jbutton findbtn = new jbutton("查找"); jbutton repbtn = new jbutton("替换"); jpanel findpn = new jpanel(); jpanel reppn = new jpanel(); jtextarea textarea; string text; boolean flg = false; int len; int start = 0; int k = 0; public findandreplace(jtextarea textarea) { this.textarea = textarea; findpn.add(findlabel); findpn.add(findtf); findpn.add(findbtn); reppn.add(replabel); reppn.add(reptf); reppn.add(repbtn); this.add(findpn); this.add(reppn); findbtn.addactionlistener(this); repbtn.addactionlistener(this); this.settitle("查找和替换"); this.setlayout(new gridlayout(2, 1)); // this.setbounds(400, 200, 300, 140); this.pack(); this.setlocationrelativeto(null); this.setresizable(false); this.setvisible(true); this.setdefaultcloseoperation(jdialog.dispose_on_close); } @suppresswarnings("deprecation") public void actionperformed(actionevent e) { string findtext = findtf.gettext(); string reptext = reptf.gettext(); text = textarea.gettext(); if (e.getsource() == findbtn) { findbtn.setlabel("下一个"); if (findtext != null) { len = findtext.length(); start = text.indexof(findtext, k); k = start + len; textarea.select(start, start + len); flg = true; if (start == -1) { joptionpane.showmessagedialog(null, "已到文件尾部！", "提示", joptionpane.information_message); start = 0; k = 0; flg = false; } } } else if (e.getsource() == repbtn) { if (flg) { textarea.replacerange(reptext, start, start + len); flg = false; } } }}// 字体格式class format extends jdialog implements actionlistener { public static int style = 0; // 全局变量类型，默认值为0 public static int size = 16; // 全局变量字体大小，默认值为16 public static font font = new font("新宋体", style, size); // 全局变量字体，默认值为新宋体 jpanel pn = new jpanel(); jpanel okcelpn = new jpanel(); jpanel fontpn = new jpanel(); jpanel ptpn = new jpanel(); jlabel fontlabel = new jlabel("字体: "); jlabel fontstylelabel = new jlabel(" 字形: "); jlabel ptlabel = new jlabel(" 磅值: "); jbutton ok = new jbutton("确定"); jbutton cancel = new jbutton("取消"); graphicsenvironment e = graphicsenvironment.getlocalgraphicsenvironment();// 获取系统中可用的字体的名字 string[] fontname = e.getavailablefontfamilynames();// 获取系统中可用的字体的名字 string[] fonttype = { "常规", "倾斜", "粗体", "粗偏斜体" }; jlist fontlist = new jlist(fontname); jlist fonttypelist = new jlist(fonttype); jscrollpane fontscroll = new jscrollpane(fontlist); jscrollpane fonttypescroll = new jscrollpane(fonttypelist); jtextarea textarea; spinnermodel spinnermodel = new spinnernumbermodel(size, // initial value 0, // min 100, // max 2 // step ); jspinner spinner = new jspinner(spinnermodel); public format(jtextarea textarea) { this.textarea = textarea; ok.addactionlistener(this); cancel.addactionlistener(this); pn.setlayout(new gridlayout(2, 1)); pn.add(fontpn); pn.add(ptpn); fontpn.add(fontlabel); fontpn.add(fontscroll); fontpn.add(fontstylelabel); fontpn.add(fonttypescroll); ptpn.add(ptlabel); ptpn.add(spinner); fontlist.setvisiblerowcount(5); fontlist.setfixedcellwidth(60); fontlist.setselectedindex(50); fontlist.setselectedvalue(font.getfontname(), true); fonttypelist.setvisiblerowcount(5); fonttypelist.setselectedindex(style); okcelpn.add(ok); okcelpn.add(cancel); okcelpn.setlayout(new flowlayout(flowlayout.right)); this.add(pn, borderlayout.center); this.add(okcelpn, borderlayout.south); this.settitle("字体"); this.pack(); this.setlocationrelativeto(null); this.setresizable(false); this.setvisible(true); this.setdefaultcloseoperation(jframe.dispose_on_close); } public void actionperformed(actionevent e) { if (e.getsource() == ok) { system.out.println(fontlist.getselectedvalue()); style = this.type(); size = integer.parseint(spinner.getvalue().tostring()); font = new font((string) fontlist.getselectedvalue(), style, size); textarea.setfont(font); this.dispose(); system.out.println(type()); } else if (e.getsource() == cancel) { this.dispose(); } } private int type() { if (fonttypelist.getselectedvalue().equals("倾斜")) { return 1; } else if (fonttypelist.getselectedvalue().equals("粗体")) { return 2; } else if (fonttypelist.getselectedvalue().equals("粗偏斜体")) { return 3; } else return 0; }}class about extends jdialog {// 关于窗口 about() { joptionpane.showmessagedialog(null, " 作者：cjb 版本：v1.5\n\n 联系：cjbi@outlook.com", "关于", joptionpane.plain_message); }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
