import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Redaktor1 extends JPanel implements ActionListener{
   JTextArea sisu=new JTextArea();
   JMenuBar riba=new JMenuBar();
   JMenu fmenyy=new JMenu("Fail");
   JMenuItem uus=new JMenuItem("Uus");
   JMenuItem ava=new JMenuItem("Ava");
   JMenuItem salvesta=new JMenuItem("Salvesta");
   JMenuItem salvestanimega=new JMenuItem("Salvesta nimega");
   JFileChooser d=new JFileChooser(new File("."));
   File f;
   JFrame kest;
   public Redaktor1(JFrame kest){
      kest.setJMenuBar(riba);
      riba.add(fmenyy);
      fmenyy.add(uus);
      fmenyy.add(ava);
      fmenyy.add(salvesta);
      fmenyy.add(salvestanimega);
      uus.addActionListener(this);
      ava.addActionListener(this);
      salvesta.addActionListener(this);
      salvestanimega.addActionListener(this);
      setLayout(new BorderLayout());
      add(new JScrollPane(sisu));
      this.kest=kest;
   }
   public void actionPerformed(ActionEvent e){
     try{
        if(e.getSource()==uus){
           f=null;
           sisu.setText("");
           kest.setTitle("Uus fail");
        }
        if(e.getSource()==ava){
           kysiFailiNimi();
           char[] puhver=new char[(int)f.length()];
           FileReader lugeja=new FileReader(f);
           lugeja.read(puhver);
           lugeja.close(); 
           sisu.setText(new String(puhver));          
        }
        if(e.getSource()==salvesta){
            if(f==null){
               kysiFailiNimi();
            }
            salvestaFaili();
        }
        if(e.getSource()==salvestanimega){
           kysiFailiNimi();
           salvestaFaili();
        }
     } catch(Exception ex){
        ex.printStackTrace();
     }
   }
   
   void kysiFailiNimi(){
           d.showDialog(this, "Vali fail");
           f=d.getSelectedFile();  
           naitaFailiNimi(); 
   }
   
   void salvestaFaili() throws IOException{
           if(f==null){return;}
           FileWriter fw=new FileWriter(f);
           String s=sisu.getText();
           fw.write(s, 0, s.length());
           fw.close();   
   }
   
   void naitaFailiNimi(){
     if(f!=null){
       kest.setTitle(f.toString());
     }
   }
   
   public static void main(String[] arg){
      JFrame f=new JFrame("Redaktor");
      Redaktor1 r=new Redaktor1(f);
      f.add(r);
      f.setSize(400, 400);
      f.setVisible(true);
   }
}