java仿windows记事本小程序

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"};

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"};

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titledborder

class 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快网idc。

java仿windows记事本小程序

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