Hi...! i'm working on a notepad project but i've got a problem in undo action this is my code:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.undo.*;
public class Notepad extends javax.swing.JFrame {
public int pos=0;
int j=1;
protected UndoManager undoManager = new UndoManager ();
private void showDialogReplace(){
jDialog1.setSize(500, 230);
jDialog1.setTitle("Replace");
jDialog1.setLocation(700, 300);
jDialog1.show();
}
public class open{
String Filename;
open(){
}
public void openfile(){
JFileChooser jfc=new JFileChooser();
jfc.showOpenDialog(jMenu1);
try
{
File file=jfc.getSelectedFile();
Filename=file.getName();
FileReader fr=new FileReader(file);
BufferedReader br=new BufferedReader(fr);
String line;
while((line=br.readLine())!=null)
{
txtOpenFile.append(line+"\n");
}
br.close();
fr.close();
}catch(IOException ex){
JOptionPane.showMessageDialog(null,"Error Openning File!");
}
}
public void getTitle(String t)
{
Filename=t;
}
public String setTitile()
{
return Filename;
}
}
public class save{
public String Filename,Filepath;
save(){
}
PrintWriter pw;
public void savefile(String F){
try {
Filename=F;
System.out.println(Filename);
if(Filename==null)
{
JFileChooser jfc=new JFileChooser();
jfc.showSaveDialog(jMenu1);
File file=jfc.getSelectedFile();
String filename=file.getName();
String filepath=file.getPath();
Filename=filename;
pw = new PrintWriter(file);
String s = txtOpenFile.getText();
pw.print(s);
pw.close();
JOptionPane.showMessageDialog(null,"File "+"'"+filename+"'"+" Successfully Saved In Path:"+"\n"+filepath);
}
else
{
File filetemp=new File(Filename);
PrintWriter pw=new PrintWriter(filetemp);
String s=txtOpenFile.getText();
pw.print(s);
pw.close();
JOptionPane.showMessageDialog(null,"Successfully Saved!");
}
} catch (FileNotFoundException ex) {
JOptionPane.showMessageDialog(null, "Error Saving File!");
}
}
public String setTitle(){
return Filename;
}
}
public class SaveAs{
String Filename;
SaveAs(){
}
PrintWriter pw;
public void Savefileas()
{
try{
JFileChooser jfc=new JFileChooser();
jfc.showSaveDialog(jMenu1);
File file=jfc.getSelectedFile();
String filename=file.getName();
String filepath=file.getPath();
Filename=filename;
PrintWriter pw = new PrintWriter(file);
String s = txtOpenFile.getText();
pw.print(s);
pw.close();
JOptionPane.showMessageDialog(null,"File "+"'"+filename+"'"+" Successfully Saved In Path:"+"\n"+filepath);
}
catch (IOException ex) {
System.out.println("Error!");
}
}
public String setname()
{
return Filename;
}
}
private void Replace(){
String text=txtOpenFile.getText();
String txt=txtreplace.getText();
String rpl=txtreplacement.getText();
int len=txt.length();
String newstr=new String();
boolean find = false;
for(int i=0;i<=text.length()-1;i++)
{
System.out.println(text.substring(i,len));
System.out.println("LEN"+len);
System.out.println("I"+i);
if(txt.equals(text.substring(i,len)))
{
System.out.println(true);
txtOpenFile.replaceRange(rpl, i, len);
find=true;
break;
}
else
{
find=false;
len++;
}
}
if(!find) {
JOptionPane.showMessageDialog(null,txt+"Cannot Found!");
}
}
private void ReplaceAll(){
String text=txtOpenFile.getText();
String txt=txtreplace.getText();
String rpl=txtreplacement.getText();
int len=txt.length();
String newstr=new String();
boolean find = false;
for(int i=0;i<=text.length()-1;i++)
{
System.out.println(text.substring(i,len));
System.out.println("LEN"+len);
System.out.println("I"+i);
if(txt.equals(text.substring(i,len)))
{
System.out.println(true);
txtOpenFile.replaceRange(rpl, i, len);
find=true;
len++;
}
else
{
find=false;
len++;
}
}
if(!find) {
JOptionPane.showMessageDialog(null,txt+"Cannot Found!");
}
}
private void Find(){
String text=txtOpenFile.getText();
String txt=txtreplace.getText();
int len=txt.length();
String newstr=new String();
boolean find = false;
for(int i=0;i<=text.length()-1;i++)
{
System.out.println(text.substring(i,len));
System.out.println("LEN"+len);
System.out.println("I"+i);
if(txt.equals(text.substring(i,len)))
{
System.out.println(true);
txtOpenFile.select(i, len);
find=true;
pos=len;
break;
}
else
{
find=false;
len++;
}
}
if(!find) {
JOptionPane.showMessageDialog(null,txt+" Cannot Found! ");
}
}
private void FindNext()
{
String text=txtOpenFile.getText();
String txt=txtreplace.getText();
int len=txt.length();
String newstr=new String();
boolean find = false;
for(int i=pos;i<=text.length()-1;i++)
{
System.out.println(text.substring(i,len));
System.out.println("LEN"+len);
System.out.println("I"+i);
System.out.println("j"+j);
if(j*len>text.length()) JOptionPane.showMessageDialog(null,txt+" Cannot Found!" );
if(txt.equals(text.substring(i,len*j)))
{
System.out.println(true);
txtOpenFile.select(i, len*j);
find=true;
pos=len;
j++;
break;
}
else
{
find=false;
len++;
}
}
if(!find) {
JOptionPane.showMessageDialog(null,txt+" Cannot Found! ");
}
}
public Notepad() {
initComponents();
}
open classopen=new open();
save classsave=new save();
SaveAs saveasclass=new SaveAs();
File file=new File("UndoTemp");
@SuppressWarnings("unchecked")
private void nemuOpenActionPerformed(java.awt.event.ActionEvent evt) {
classopen.openfile();
this.setTitle(classopen.setTitile()+"-Notepad");
}
private void menuSaveActionPerformed(java.awt.event.ActionEvent evt) {
classsave.savefile(classopen.setTitile());
this.setTitle(classsave.setTitle()+"-Notepad");
}
private void menuNewActionPerformed(java.awt.event.ActionEvent evt) {
}
private void formWindowOpened(java.awt.event.WindowEvent evt) {
setExtendedState(MAXIMIZED_BOTH);
this.setTitle("Newfile"+"-Notepad");
}
private void jMenu1ActionPerformed(java.awt.event.ActionEvent evt) {
}
private void menusaveasActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println(saveasclass.setname());
saveasclass.Savefileas();
classopen.getTitle(saveasclass.setname());
this.setTitle(saveasclass.setname()+"Notepad");
}
private void formWindowClosing(java.awt.event.WindowEvent evt) {
JOptionPane.showConfirmDialog(null,
"Are You Sure?", "Confirmation", JOptionPane.YES_NO_OPTION);
}
private void txtOpenFileKeyPressed(java.awt.event.KeyEvent evt) {
lblStatus.setText("Writing...");
}
private void txtOpenFileKeyReleased(java.awt.event.KeyEvent evt) {
try {
Thread.sleep(100);
lblStatus.setText("");
} catch (InterruptedException ex) {
Logger.getLogger(Notepad.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void menuExitActionPerformed(java.awt.event.ActionEvent evt) {
this.dispose();
}
private void menuReplaceActionPerformed(java.awt.event.ActionEvent evt) {
String Text=txtOpenFile.getText();
showDialogReplace();
}
private void txtOpenFileKeyTyped(java.awt.event.KeyEvent evt) {
try {
FileOutputStream fos=new FileOutputStream(file,false);
DataOutputStream dos=new DataOutputStream(fos);
String s=txtOpenFile.getText();
try {
dos.writeChars(s);
} catch (IOException ex) {
Logger.getLogger(Notepad.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (FileNotFoundException ex) {
Logger.getLogger(Notepad.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jButton17ActionPerformed(java.awt.event.ActionEvent evt) {
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
Replace();
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
ReplaceAll(); // TODO add your handling code here:
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
Find();
}
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
FindNext(); // TODO add your handling code here:
}
private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {
undoManager.undo (); // TODO add your handling code here:
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Notepad().setVisible(true);
}
});
}
and This the complete program,i'm working on undo function i do this but it won't work what is wrong with this guys?!
thanks...
