This code creates a small application which is a basic text editor initially and I have added a drop down file menu which is obvious in every editor, it includes features like 'new', 'open', 'save' and 'save as'.
I am not getting how to add the feature of saving in the existing file and a new file.
import java.io.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.IOException;
import java.nio.file.StandardOpenOption;
public class Editor implements ActionListener
{
boolean updateStatus;
Editor Jedtr;
boolean saved;
boolean newFileFlag;
String fileName;
static File fileRef;
JFrame f;
JMenuBar mb;
JMenu file,edit,help;
JMenuItem cut,copy,paste,selectAll,NewFile,Open,Save,SaveAs;
JTextArea ta;
Editor(){
saved=true;
newFileFlag=true;
fileName=new String("Untitled");
fileRef=new File(fileName);
Open=new JMenuItem("Open File");
Open.addActionListener(this);
file=new JMenu("File");
file.add(Open);
mb=new JMenuBar();
f=new JFrame();
cut=new JMenuItem("Cut");
copy=new JMenuItem("Copy");
paste=new JMenuItem("Paste");
selectAll=new JMenuItem("Select All");
/////////////////////////////////////////////////////////////////////////////////
NewFile =new JMenuItem("New");
Open=new JMenuItem("Open");
Save=new JMenuItem("Save");
SaveAs=new JMenuItem("Save As");
///////////////////////////////////////////////////////////////////////////////////
cut.addActionListener(this);
copy.addActionListener(this);
paste.addActionListener(this);
selectAll.addActionListener(this);
/////////////////////////////////////////////////////////////////////////////////////
NewFile.addActionListener(this);
Open.addActionListener(this);
Save.addActionListener(this);
SaveAs.addActionListener(this);
//////////////////////////////////////////////////////////////////////////////////
mb=new JMenuBar();
file=new JMenu("File");
edit=new JMenu("Edit");
help=new JMenu("Help");
file.add(NewFile);file.add(Open);file.add(Save);file.add(SaveAs);
edit.add(cut);edit.add(copy);edit.add(paste);edit.add(selectAll);
mb.add(file);mb.add(edit);mb.add(help);
///////////////////////////////////////////////////////////////////////////////////////
ta=new JTextArea();
ta.setBounds(5,5,1200,1200);
f.add(mb);f.add(ta);
f.setJMenuBar(mb);
f.setLayout(null);
f.setSize(800,400);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
/////////////////////////////Action performed/////////////////////////////////////////////////
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==cut)
ta.cut(); // to cut text.
else if(e.getSource()==paste)
ta.paste(); // to paste text.
else if(e.getSource()==copy)
ta.copy(); // to copy text.
else if(e.getSource()==selectAll)
ta.selectAll(); // to select text.
else if(e.getSource()==Open)
{
JFileChooser fc=new JFileChooser();
int i=fc.showOpenDialog(f);
if(i==JFileChooser.APPROVE_OPTION)
{
File f=fc.getSelectedFile();
String filepath=f.getPath();
try
{
BufferedReader br=new BufferedReader(new FileReader(filepath));
String s1="",s2="";
while((s1=br.readLine())!=null)
{
s2+=s1+"\n";
}
ta.setText(s2);
br.close();
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
} //to open an existing file
else if(e.getSource() == NewFile)
{
JFileChooser fc=new JFileChooser();
int j=fc.showOpenDialog(f);
if (j==JFileChooser.CUSTOM_DIALOG);
System.out.println("New File");
File file = new File("C:\\Android\\.txt");
boolean result;
try {
// create a new file
result = file.createNewFile();
// test if successfully created a new file
if(result){
System.out.println("Successfully created "+file.getAbsolutePath());
}
else{
System.out.println("Filed creating "+file.getAbsolutePath());
}
}
catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
} // to create a new file.
else if(e.getSource()== SaveAs)
{ // what to specify here?
}
else if(e.getSource()==Save)
{ // what to specify here?
}
}
/*private Object SaveAs(File temp)
{
// TODO Auto-generated method stub
return null;
}
///////////////////////////////////////////////////////////////////////////////////////////////
private void updateStatus(File temp, boolean b)
{
// TODO Auto-generated method stub
}*/
boolean isSave()
{
return saved;}
void setSave(boolean saved)
{
this.saved=saved;
}
String getFileName()
{
return new String(fileName);
}
void setFileName(String fileName)
{
this.fileName=new String(fileName);
}
////-------File-------////////
//public class File implements ActionListener{}
////-------File-------////////
/*public void actionPerformedf(ActionEvent O) {
if(O.getSource()==Open){
JFileChooser fc=new JFileChooser();
int i=fc.showOpenDialog(f);
if(i==JFileChooser.APPROVE_OPTION){
File f=fc.getSelectedFile();
String filepath=f.getPath();
try{
BufferedReader br=new BufferedReader(new FileReader(filepath));
String s1="",s2="";
while((s1=br.readLine())!=null){
s2+=s1+"\n";
}
ta.setText(s2);
br.close();
}catch (Exception ex)
{
ex.printStackTrace();
}
}
}
}*/
public static void main(String[] args) {
new Editor();
}
}
