//这是主窗体文件 Wordwin.java

import javax.swing.*;

import javax.swing.event.DocumentEvent;

import javax.swing.event.DocumentListener;

import java.awt.*;

import java.io.*;

import java.awt.event.*;

public class Wordwin extends JFrame implements DocumentListener {

/**

*

*/

private static final long serialVersionUID = 1L;

JMenuBar menubar=new JMenuBar();

JMenu file=new JMenu("文件");

JMenu edit=new JMenu("编辑");

JMenu geshi=new JMenu("格式");

JMenu look =new JMenu("查看");

JMenu help =new JMenu("帮助");

JTextArea wordArea=new JTextArea();

JScrollPane imgScrollPane = new JScrollPane(wordArea);

String [] str1={"新建","打开","保存","另存为","页面设置","打印","退出"};

String [] str2={"剪切","复制","粘贴","查找","替换"};

String [] str3={"自动换行","字体"};

Font f1=new Font("隶书",Font.PLAIN,15);

Search d1=new Search();

Font1 z1=new Font1();

Change c1=new Change();

int flag=0;

String source="";

public static void main(String[] args) {

JFrame wordwin=new Wordwin();

wordwin.setVisible(true);

}

public Wordwin(){

c1.set(wordArea);

z1.set(wordArea);

setTitle("文本编辑器");

Toolkit kit = Toolkit.getDefaultToolkit();

Dimension screenSize = kit.getScreenSize();//获取屏幕分辨率

setSize(screenSize.width/2,screenSize.height/2);//大小

setLocation(screenSize.width/4,screenSize.height/4);//位置

add(imgScrollPane,BorderLayout.CENTER);

setJMenuBar(menubar);

file.setFont(f1);

edit.setFont(f1);

geshi.setFont(f1);

look.setFont(f1);

help.setFont(f1);

menubar.add(file);

menubar.add(edit);

menubar.add(geshi);

menubar.add(look);

menubar.add(help);

wordArea.getDocument().addDocumentListener(this);

for(int i=0;i

JMenuItem item1= new JMenuItem(str1[i]);

item1.addActionListener(new MyActionListener1());

item1.setFont(f1);

file.add(item1);

}

for(int i=0;i

JMenuItem item2= new JMenuItem(str2[i]);

item2.addActionListener(new MyActionListener1());

item2.setFont(f1);

edit.add(item2);

}

for(int i=0;i

JMenuItem item3= new JMenuItem(str3[i]);

item3.addActionListener(new MyActionListener1());

item3.setFont(f1);

geshi.add(item3);

}

}

public void changedUpdate(DocumentEvent e) {

flag=1;

}

public void insertUpdate(DocumentEvent e) {

flag=1;

}

public void removeUpdate(DocumentEvent e) {

flag=1;

}

void open(){

FileDialog filedialog=new FileDialog(this,"打开",FileDialog.LOAD);

filedialog.setVisible(true);

String path=filedialog.getDirectory();

String name=filedialog.getFile();

if(path!=null && name!=null){

FileInputStream file = null;

try {

file = new FileInputStream(path+name);

} catch (FileNotFoundException e) {

}

InputStreamReader put =new InputStreamReader(file);

BufferedReader in=new BufferedReader(put);

String temp="";

String now = null;

try {

now = (String)in.readLine();

} catch (IOException e) {

e.printStackTrace();

}

while(now!=null){

temp+=now+"\r\n";

try {

now=(String)in.readLine();

} catch (IOException e) {

e.printStackTrace();

}

}

wordArea.setText(temp);

}

}

void save(){

FileDialog filedialog=new FileDialog(this,"保存",FileDialog.SAVE);

filedialog.setVisible(true);

if(filedialog.getDirectory()!=null && filedialog.getFile()!=null){

OutputStreamWriter out = null;

try {

out = new OutputStreamWriter(new FileOutputStream(filedialog.getDirectory()+filedialog.getFile()));

} catch (FileNotFoundException e) {

e.printStackTrace();

}

try {

out.write(wordArea.getText());

} catch (IOException e) {

e.printStackTrace();

}

flag=0;

try {

out.close();

source=wordArea.getText();

} catch (IOException e) {

e.printStackTrace();

}

}

}

void newfile(){

if(flag==0){

wordArea.setText("");

}

if(flag==1){

int m= JOptionPane.showConfirmDialog(this,"是否保存该文件");

if(m==0){

save();

wordArea.setText("");

}

if(m==1){

//System.exit(0);

wordArea.setText("");

flag=0;

}

}

}

void exit(){

if(flag==0){

System.exit(0);

}

if(flag==1){

int m= JOptionPane.showConfirmDialog(this,"是否保存该文件");

if(m==0){

save();

}

if(m==1){

System.exit(0);

}

}

}

class MyActionListener1 implements ActionListener{

public void actionPerformed(ActionEvent e) {

if(e.getSource()instanceof JMenuItem){

if(e.getActionCommand()=="剪切"){

wordArea.cut();

}

if(e.getActionCommand()=="复制"){

wordArea.copy();

}

if(e.getActionCommand()=="粘贴"){

wordArea.paste();

}

if(e.getActionCommand()=="查找"){

d1.setVisible(true);

}

if(e.getActionCommand()=="字体"){

z1.setVisible(true);

}

if(e.getActionCommand()=="替换"){

c1.setVisible(true);

}

if(e.getActionCommand()=="打开"){

open();

}

if(e.getActionCommand()=="保存"){

save();

}

if(e.getActionCommand()=="新建"){

newfile();

}

if(e.getActionCommand()=="退出"){

exit();

}

}

}

}

}

//这是查找替换的实现Change.java

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

class Change extends JDialog{

/**

*

*/

private static final long serialVersionUID = 1L;

JLabel l1=new JLabel("查找内容");

JLabel l2=new JLabel("替换为");

JTextField t1=new JTextField(10);

JTextField t2=new JTextField(10);

JButton b1=new JButton("替换");

JButton b2=new JButton("全部替换");

JButton b3=new JButton("取消");

JTextArea a1=new JTextArea();

Font f1=new Font("隶书",Font.PLAIN,15);

//int m;

void set(JTextArea n){

a1=n;

}

public Change(){

setTitle("替换");

setSize(500,300);

setLocation(200,300);

setLayout(new FlowLayout());

l1.setFont(f1);

l2.setFont(f1);

t1.setFont(f1);

t2.setFont(f1);

b1.setFont(f1);

b2.setFont(f1);

b3.setFont(f1);

add(l1);

add(t1);

add(l2);

add(t2);

add(b1);

add(b2);

add(b3);

b1.addActionListener(new MyActionListener3());

b2.addActionListener(new MyActionListener3());

b3.addActionListener(new MyActionListener3());

}

class MyActionListener3 implements ActionListener{

public void actionPerformed(ActionEvent e2) {

int m;

String source=a1.getText();

String find=t1.getText();

String change=t2.getText();

if(e2.getActionCommand()=="取消"){

setVisible(false);

t1.setText("");

t2.setText("");

}

if(e2.getActionCommand()=="替换"){

m=source.indexOf(find,0);

String s1=source.substring(0,m);

String s2=source.substring(m+find.length());

source=s1+change+s2;

if(m==-1){

JOptionPane.showMessageDialog(null,"对不起，没找到您要找的内容！");

}else{

a1.setText(source);

}

}

if(e2.getActionCommand()=="全部替换"){

m=-change.length();

while(true){

m=source.indexOf(find,m+change.length());

if(m==-1)

break;

else{

String s1=source.substring(0,m);

String s2=source.substring(m+find.length());

source=s1+change+s2;

}

}

a1.setText(source);

}

}

}

}

//这是改变字体的Font1.java

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class Font1 extends JDialog implements ItemListener{

/**

*

*/

private static final long serialVersionUID = 1L;

JPanel panel1 = new JPanel();

JPanel panel2 = new JPanel();

JPanel panel3 = new JPanel();

JComboBox comboBox1 = new JComboBox();

JComboBox comboBox2 = new JComboBox();

JComboBox comboBox3 = new JComboBox();

JLabel lab1=new JLabel("字体：");

JLabel lab2=new JLabel("字形：");

JLabel lab3=new JLabel("字号：");

String name=new String("宋体");

Font f1=new Font("隶书",Font.PLAIN,15);

int style=1;

int size=12;

String []array2=new String[]{"常 规","倾 斜","加 粗"};

String []array3=new String[]{"14","15","15","16","17","18"};

GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();

String [] fontName=ge.getAvailableFontFamilyNames();

JButton b1=new JButton("确定");

JButton b2=new JButton("颜色");

JTextArea a1=new JTextArea();

void set(JTextArea n){

a1=n;

}

public Font1(){

setTitle("字体");

setSize(500,600);

setLayout(new FlowLayout());

//panel1.setLocation(100, 200);

lab1.setFont(f1);

lab2.setFont(f1);

comboBox1.setModel(new DefaultComboBoxModel(fontName));

comboBox1.setFont(f1);

for(int i=1;i

//comboBox1.setSelectedIndex(i);

comboBox1.setSelectedItem(fontName);

//comboBox1.addItem(fontName);

}

comboBox2.setModel(new DefaultComboBoxModel(array2));

comboBox2.setFont(f1);

for(int i=1;i

//comboBox2.setSelectedIndex(i);

comboBox2.setSelectedItem(array2);

//comboBox2.addItem(array2);

}

comboBox3.setModel(new DefaultComboBoxModel(array3));

comboBox3.setFont(f1);

for(int i=1;i

//comboBox2.setSelectedIndex(i);

comboBox2.setSelectedItem(array3);

//comboBox3.addItem(array3);

}

panel1.add(lab1);

panel1.add(comboBox1);

panel2.add(lab2);

panel2.add(comboBox2);

panel3.add(lab3);

panel3.add(comboBox3);

panel3.add(b1);

panel3.add(b2);

b2.addActionListener(new MyActionListener3());

comboBox1.addItemListener(this);

comboBox2.addItemListener(this);

comboBox3.addItemListener(this);

b1.addActionListener(new MyActionListener3());

add(panel1);

add(panel2);

add(panel3);

}

public void itemStateChanged(ItemEvent e) {

if(e.getSource()==comboBox1){

name=comboBox1.getSelectedItem().toString();

}

if(e.getSource()==comboBox2){

String s1=comboBox2.getSelectedItem().toString();

if(s1.equals("加粗")){

style=Font.BOLD;

}

if(s1.equals("倾斜")){

style=Font.ITALIC;

}

if(s1.equals("常规")){

style=Font.PLAIN;

}

}

if(e.getSource()==comboBox3){

String s2=comboBox3.getSelectedItem().toString();

size=Integer.parseInt(s2);

}

}

class MyActionListener3 implements ActionListener{

public void actionPerformed(ActionEvent e2) {

Font f=new Font(name,style,size);

a1.setFont(f);

if(e2.getActionCommand()=="颜色"){

setcolor();

}

}

}

void setcolor(){

Colorfontcolor=JColorChooser.showDialog(this,"字体颜色选择",a1.getForeground());

a1.setForeground(fontcolor);

}

}

//这是查找窗口，对不起，查找功能没实现Search.java

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class Search extends JDialog{

/**

*

*/

private static final long serialVersionUID = 1L;

JLabel l1=new JLabel("查找内容");

JTextField t1=new JTextField(10);

JButton b1=new JButton("查找下一个");

JButton b2=new JButton("取消");

Font f1=new Font("隶书",Font.PLAIN,15);

public Search(){

setTitle("查找");

setSize(300,200);

setLayout(new FlowLayout());

b1.setFont(f1);

b2.setFont(f1);

l1.setFont(f1);

add(l1);

add(t1);

add(b1);

add(b2);

b2.addActionListener(new MyActionListener2());

}

class MyActionListener2 implements ActionListener{

public void actionPerformed(ActionEvent e1) {

setVisible(false);

}

}

}

运行截图：