第1个回答 2009-12-24
import java.awt.FlowLayout;
import java.awt.event.*;
import java.io.*;
import java.util.Date;
import javax.swing.*;
import cn.com.bj.*;
public class TestNotepad extends JFrame implements ActionListener, MouseListener{
private int set = 0; //查找位置
private JFrame jf = new JFrame("Notepad"); //面板
private JTextArea jta = new JTextArea(20, 30); //文本区
JScrollPane jsp = new JScrollPane(jta); //滚动条
private JTextField jtf = new JTextField(10); //单行文本区
private JTextField jtft = new JTextField(10); //单行文本区
//接收发送过来的请求,并做相应处理
public void readText(String path){
//list.clear();
FileInputStream fis;
try {
fis = new FileInputStream(path);
InputStreamReader isr=new InputStreamReader(fis);
BufferedReader br=new BufferedReader(isr);
jta.setText("");
String temp=br.readLine();
while(temp!=null){
jta.append(temp+"\n");
temp=br.readLine();
}
} catch (Exception e) {
e.printStackTrace();
}
}
public String readPath(){
//JFrame frm=new JFrame();
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
chooser.setVisible(true);
int i=chooser.showOpenDialog(this);
String path=null;
if(i==JFileChooser.APPROVE_OPTION){
path=chooser.getSelectedFile().getPath();
return path;
}else
return null;
}
public String savePath(){
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
chooser.setVisible(true);
int i=chooser.showSaveDialog(this);
String path=null;
if(i==JFileChooser.APPROVE_OPTION){
path=chooser.getSelectedFile().getPath();
return path;
}else
return null;
}
public boolean writer(String paths){
//String paths=savePath();
FileWriter fw;
try {
fw = new FileWriter(paths);
fw.write(jta.getText());
fw.close();
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
public void actionPerformed(ActionEvent e) {
String comm = e.getActionCommand(); //
if (comm.equals("新建...")) {
new TestNotepad();
//jta.setText("");
}
if (comm.equals("保存")) {
System.out.println("保存");
String saveStr=this.savePath();
System.out.println(this.writer(saveStr));
}
if (comm.equals("日期")){
jta.append(new Date().toString());
}
if (comm.equals("打开...")){
readText(readPath());
}
if (comm.equals("退出")){
System.exit(0);
}
if (comm.equals("剪切")) {
jta.cut();
}
if (comm.equals("复制")) {
jta.copy();
}
if (comm.equals("粘贴")) {
jta.paste();
}
if (comm.equals("删除")) {
jta.cut();
}
if(comm.equals("颜色选择")){
jta.setForeground(Util.setColor());
}
if ("查找...".equals(comm) || "替换...".equals(comm)) {
JDialog jd = new JDialog(jf, comm);
String label = comm.substring(0, 2);
JButton jb = new JButton(label);
jb.addActionListener(this);
jd.setLayout(new FlowLayout());
jd.add(jtf);
if ("替换...".equals(comm)) {
JLabel jlt = new JLabel(">");
jd.add(jlt);
jd.add(jtft);
}
jd.add(jb);
if ("替换...".equals(comm)) {
JButton jball = new JButton("替换全部");
jball.addActionListener(this);
jd.add(jball);
}
jd.pack();
jd.setResizable(false);
jd.setLocation(400, 240);
jd.setVisible(true);
}
if (comm.equals("全选")) {
jta.selectAll();
}
if (comm.equals("关于...")) {
JDialog jd = new JDialog(jf, "关于...");
jd.setLayout(new FlowLayout());
JLabel jl = new JLabel("制作者: xxxxxxxx");
jd.add(jl);
jd.setSize(180, 100);
jd.setResizable(false);
jd.setLocation(400, 240);
jd.setVisible(true);
}
if (comm.equals("查找")) {
String str = jtf.getText();
String strall = jta.getText();
int n = strall.indexOf(str, set);
if (n != -1) {
set = n + 1;
jta.setSelectionStart(n);
jta.setSelectionEnd(n + str.length());
}
}
if (comm.equals("替换") || comm.equals("替换全部")) {
String str = jtf.getText();
String strall = jta.getText();
if (comm.equals("替换全部")) {
int n1 = 0;
while (true) {
set = strall.indexOf(str, n1);
if (set == -1)
break;
n1 = set + 1;
jta.setSelectionStart(set);
jta.setSelectionEnd(set + str.length());
jta.replaceSelection(jtft.getText());
}
set = 0;
}
int n = strall.indexOf(str, set);
if (n == -1) {
set = 0;
} else {
set = n + 1;
jta.setSelectionStart(n);
jta.setSelectionEnd(n + str.length());
jta.replaceSelection(jtft.getText());
}
}
}
public TestNotepad() {
jta.setLineWrap(true);
jta.addMouseListener(this);
jf.add(jsp);
JMenuBar jmb = new JMenuBar();
JMenu jm1 = new JMenu("文件");
String[] label1 = { "新建...", "打开...", "保存", "退出" };
JMenuItem[] jmi1 = new JMenuItem[label1.length];
for (int i = 0; i < jmi1.length; i++) {
jmi1[i] = new JMenuItem(label1[i]);
jm1.add(jmi1[i]);
jmi1[i].addActionListener(this);
}
jm1.insertSeparator(1);
jm1.insertSeparator(3);
jm1.insertSeparator(6);
JMenu jm2 = new JMenu("编辑");
String[] label2 = { "剪切", "复制", "粘贴", "删除", "查找...", "替换...",
"全选","颜色选择","日期" };
JMenuItem[] jmi2 = new JMenuItem[label2.length];
for (int i = 0; i < jmi2.length; i++) {
jmi2[i] = new JMenuItem(label2[i]);
jm2.add(jmi2[i]);
jmi2[i].addActionListener(this);
}
jm2.insertSeparator(1);
jm2.insertSeparator(5);
jm2.insertSeparator(7);
jm2.insertSeparator(10);
JMenu jm3 = new JMenu("帮助");
JMenuItem jmi3 = new JMenuItem("关于...");
jm3.add(jmi3);
jmi3.addActionListener(this);
jmb.add(jm1);
jmb.add(jm2);
jmb.add(jm3);
jf.setJMenuBar(jmb);
jf.pack();
jf.setLocation(300, 200);
jf.setVisible(true);
//jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
public static void main(String[] args) {
new TestNotepad();
}
//鼠标右键功能
public void mouseClicked(MouseEvent e) {
JPopupMenu pp = new JPopupMenu();
if (e.getButton() == 3) {
JMenuItem jmi1,jmi2,jmi3,jmi4;
pp.add(jmi1 = new JMenuItem("剪切"));
pp.add(jmi2 = new JMenuItem("复制"));
pp.add(jmi3 = new JMenuItem("粘贴"));
pp.addSeparator();
pp.add(jmi4 = new JMenuItem("全选"));
jmi1.addActionListener(this);
jmi2.addActionListener(this);
jmi3.addActionListener(this);
jmi4.addActionListener(this);
pp.pack();
jf.add(pp);
pp.setVisible(true);
pp.show(e.getComponent(), e.getX(), e.getY());
}
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
}
关于撤消操作部分可参见%JAVA_HOME%\demo\jfc\Notepad