本文实例为大家分享了java仿windows记事本小程序的具体代码，供大家参考，具体内容如下
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import java.awt.checkboxmenuitem;import java.awt.font;import java.awt.frame;import java.awt.menu;import java.awt.menubar;import java.awt.menuitem;import java.awt.menushortcut;import java.awt.textarea;import java.awt.toolkit;import java.awt.event.actionevent;import java.awt.event.actionlistener;import java.awt.event.itemevent;import java.awt.event.itemlistener;import java.awt.event.keyevent;import java.awt.event.windowadapter;import java.awt.event.windowevent;import java.awt.peer.buttonpeer;import java.io.bufferedreader;import java.io.file;import java.io.fileinputstream;import java.io.filenotfoundexception;import java.io.fileoutputstream;import java.io.ioexception;import java.io.inputstreamreader;import java.io.outputstream;import java.io.stringreader;import java.io.stringwriter;import java.sql.date;import java.text.simpledateformat; import javax.print.docflavor.string;import javax.script.scriptexception;import javax.swing.borderfactory;import javax.swing.boxlayout;import javax.swing.buttongroup;import javax.swing.jfilechooser;import javax.swing.jframe;import javax.swing.joptionpane;import javax.swing.jpanel;import javax.swing.jradiobutton;import javax.swing.jscrollbar;import javax.swing.jscrollpane;import javax.swing.jtextarea;import javax.swing.border.etchedborder;import javax.swing.border.titledborder;import javax.swing.event.ancestorlistener;import javax.swing.filechooser.filenameextensionfilter; public class crazy_15_4 { private jframe f = new jframe("记事本"); //成员变量 static string shearplate = null; static boolean isautowrap = true;//是否自动换行 jtextarea ta = new jtextarea(20, 60); jscrollpane jsp = new jscrollpane(ta); private menubar mb = new menubar(); public string fontstr = "宋体"; public string shapestr = "0"; public string sizestr = "20"; font font = new font(fontstr, integer.parseint(shapestr),integer.parseint(sizestr) ); //menu menu file = new menu("文件"); menu edit = new menu("编辑"); menu format = new menu("格式"); //menuitem menuitem newitem = new menuitem("新建"); menuitem openitem = new menuitem("打开"); menuitem saveitem = new menuitem("保存"); menuitem saveasitem = new menuitem("另存为"); menuitem cutitem = new menuitem("剪切"); menuitem copyitem = new menuitem("复制"); menuitem pasteitem = new menuitem("粘贴"); checkboxmenuitem autowrap = new checkboxmenuitem("自动换行",isautowrap); menuitem fontitem = new menuitem("字体"); //使用“ctrl+x”快捷键 menuitem exitiitem = new menuitem("退出", new menushortcut(keyevent.vk_x)); public void init() { //带滚动条的文本域 ta.setlinewrap(isautowrap); jsp.sethorizontalscrollbarpolicy(jscrollpane.horizontal_scrollbar_never); jsp.setverticalscrollbarpolicy(jscrollpane.vertical_scrollbar_as_needed); file.add(newitem); file.add(openitem); file.add(saveitem); file.add(saveasitem); edit.add(cutitem); edit.add(copyitem); edit.add(pasteitem); format.add(autowrap); format.add(fontitem); mb.add(file); mb.add(edit); mb.add(format); f.setmenubar(mb); f.addwindowlistener(new windowadapter() { public void windowclosing(windowevent we) { if(!(ta.gettext().equals(""))) { object[] options = {"保存","不保存","取消"}; int a = joptionpane.showoptiondialog(null,"是否将更改保存到h:/programing/无标题.txt","记事本", joptionpane.yes_no_cancel_option,joptionpane.question_message, null, options, options[0]); if(a == joptionpane.ok_option ) { if(save()) { system.exit(0); } }else if(a == joptionpane.no_option) { system.exit(0); } }else { system.exit(0); } } }); newitem.addactionlistener(new newlistener()); openitem.addactionlistener(new openlistener()); saveitem.addactionlistener(new savelistener()); saveasitem.addactionlistener(new saveaslistener()); cutitem.addactionlistener(new cutaslistener()); copyitem.addactionlistener(new copyaslistener()); pasteitem.addactionlistener(new pasteaslistener()); autowrap.additemlistener(new autowrapaslistener()); fontitem.addactionlistener(new fontlistener()); ta.setfont(font); //使文本框处在屏幕中间 int width = toolkit.getdefaulttoolkit().getscreensize().width; int height = toolkit.getdefaulttoolkit().getscreensize().height; f.add(jsp); f.pack(); f.setlocation(width/2-f.getwidth()/2, height/2-f.getheight()/2); f.setvisible(true); //避免关闭对话框直接关闭文本文件 f.setdefaultcloseoperation(jframe.do_nothing_on_close); } public static void main(string[] args) { new crazy_15_4().init(); } //是否保存 public void saveornot() { if(!(ta.gettext().equals(""))) { object[] options = {"保存","不保存","取消"}; int a = joptionpane.showoptiondialog(null,"是否将更改保存到h:/programing/无标题.txt","记事本", joptionpane.yes_no_cancel_option,joptionpane.question_message, null, options, options[0]); if(a == joptionpane.ok_option ) { save(); } } } //保存文本文件 public boolean save() { boolean issaved = false; jfilechooser jf = new jfilechooser(); filenameextensionfilter filter = new filenameextensionfilter("txt","txt"); jf.setacceptallfilefilterused(false); jf.setfilefilter(filter); int value = jf.showsavedialog(null); if(value == jfilechooser.approve_option) { file file = jf.getselectedfile(); string str = ta.gettext(); byte[] buf = str.getbytes(); try { outputstream os = new fileoutputstream(file); os.write(buf); os.flush(); os.close(); issaved = true; } catch (ioexception e) { e.printstacktrace(); } } return issaved; } //新建监听器 class newlistener implements actionlistener{ public void actionperformed(actionevent e) { if(!(ta.gettext().equals(""))) { object[] options = {"保存","不保存","取消"}; int a = joptionpane.showoptiondialog(null,"是否将更改保存到h:/programing/无标题.txt","记事本", joptionpane.yes_no_cancel_option,joptionpane.question_message, null, options, options[0]); if(a == joptionpane.ok_option ) { if(save()) { ta.settext(""); } }else if(a == joptionpane.no_option) { ta.settext(""); } } } } //打开监听器，从硬盘目录打开文本文件 class openlistener implements actionlistener{ public void actionperformed(actionevent e) { jfilechooser jf = new jfilechooser(); filenameextensionfilter filter = new filenameextensionfilter("txt","txt"); jf.setacceptallfilefilterused(false); jf.setfilefilter(filter); int value = jf.showopendialog(null); if(value == jfilechooser.approve_option) { file file = jf.getselectedfile(); try { string encoding = "gbk";//考虑编码格式 inputstreamreader isr = new inputstreamreader(new fileinputstream(file),encoding); bufferedreader br = new bufferedreader(isr); string str = null; while((str = br.readline()) != null) { ta.append(str); } } catch (filenotfoundexception e1) { // todo auto-generated catch block e1.printstacktrace(); } catch (ioexception e1) { // todo auto-generated catch block e1.printstacktrace(); } } } } //保存监听器，以电脑时间命名 class savelistener implements actionlistener{ public void actionperformed(actionevent e) { string name = null; simpledateformat df = new simpledateformat("yyyy-mm-dd hh-mm-ss"); name = df.format(system.currenttimemillis()); file file = new file("h:/programing/workspace/"+name+".txt"); string str = ta.gettext(); byte[] buf = str.getbytes(); if(!str.equals("")) { try { outputstream os = new fileoutputstream(file); os.write(buf); os.flush(); os.close(); } catch (ioexception e2) { e2.printstacktrace(); } } } } //另存为监听器 class saveaslistener implements actionlistener{ public void actionperformed(actionevent e) { save(); } } //剪切监听器 class cutaslistener implements actionlistener{ public void actionperformed(actionevent e) { shearplate = ta.getselectedtext(); int startposi = ta.getselectionstart(); int endposi = ta.getselectionend(); stringbuffer sb = new stringbuffer(ta.gettext()); sb.delete(startposi, endposi); ta.settext(sb.tostring()); } } //复制监听器 class copyaslistener implements actionlistener{ public void actionperformed(actionevent e) { shearplate = ta.getselectedtext(); } } //粘贴监听器 class pasteaslistener implements actionlistener{ public void actionperformed(actionevent e) { int position = ta.getcaretposition(); stringbuilder sb = new stringbuilder(ta.gettext()); sb.insert(position, shearplate); ta.settext(sb.tostring()); ta.setcaretposition(position+shearplate.length()); } } //自动换行监听器 class autowrapaslistener implements itemlistener{ @override public void itemstatechanged(itemevent e) { if(autowrap.getstate()) { isautowrap = true; ta.setlinewrap(isautowrap); jsp.sethorizontalscrollbarpolicy(jscrollpane.horizontal_scrollbar_never); jsp.setverticalscrollbarpolicy(jscrollpane.vertical_scrollbar_as_needed); }else { isautowrap = false; ta.setlinewrap(isautowrap); jsp.sethorizontalscrollbarpolicy(jscrollpane.horizontal_scrollbar_as_needed); jsp.setverticalscrollbarpolicy(jscrollpane.vertical_scrollbar_never); } } } //字体监听器 class fontlistener implements actionlistener{ jframe jf = new jframe("字体"); jpanel jp = new jpanel(); buttonpanel fontbutton = new buttonpanel("字体",new string[] {"宋体","黑体","楷体","吴祎晗1.0"}); buttonpanel shapebutton = new buttonpanel("字形",new string[] {"常规","粗体","斜体","粗体&斜体"}); buttonpanel sizebutton = new buttonpanel("字号",new string[] {"12","16","20","24","26"}); public void actionperformed(actionevent e) { jp.setborder(new titledborder(new etchedborder(),"字体选择",titledborder.center,titledborder.top)); jp.add(fontbutton); jp.add(shapebutton); jp.add(sizebutton); jf.add(jp); jf.pack(); jf.setlocationrelativeto(f); jf.setvisible(true); jf.addwindowlistener(new windowadapter() { public void windowclosing(windowevent e) { fontstr = fontbutton.getselec(); sizestr = sizebutton.getselec(); font = new font(fontstr, shapeval(shapebutton.getselec()), integer.parseint(sizestr)); ta.setfont(font); } }); } public int shapeval(string str) { int a = 0; switch (str) { case "常规": a = 0; break; case "粗体": a = 1; break; case "斜体": a = 2; break; case "粗体&斜体": a = 3; break; } return a; } } } //定义一个jpanel类扩展类，该类的对象包含多个纵向排列的//jradiobutton控件，且panel扩展类可以指定一个字符串作为titledborderclass buttonpanel extends jpanel{ private buttongroup group; public buttonpanel(string title, string[] options) { setborder(borderfactory.createtitledborder(borderfactory.createetchedborder(),title)); setlayout(new boxlayout(this, boxlayout.y_axis)); group = new buttongroup(); for(int i=0; options!=null&&i<options.length; i++) { jradiobutton b = new jradiobutton(options[i]); b.setactioncommand(options[i]); this.add(b); group.add(b); if(title.equals("字号")) { b.setselected(i == 2); }else { b.setselected(i == 0); } } } public string getselec() { return group.getselection().getactioncommand(); }} |
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。
