import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class Muistio
{	public static void main(String[] args) {
		Lomake1 viite = new Lomake1("Muistio");	
	}
}

class Lomake1 extends Frame implements ActionListener, WindowListener
{	
   TextField tiedosto;
   TextArea alue;
   String leikepoyta;
   Button uusi,avaa,tallenna,leikkaa,kopioi,liita;


	Lomake1(String otsikko)
	{	
		super(otsikko);	 
		setSize(400,300);	
		setLayout(new FlowLayout());
		
		add(uusi = new Button("Uusi"));
		add(avaa = new Button("Avaa"));
    	add(tallenna = new Button("Tallenna"));
	    add(leikkaa = new Button("Leikkaa"));
    	add(kopioi = new Button("Kopioi"));
    	add(liita = new Button("Liitä"));
    	add(tiedosto = new TextField(40));
		add(alue = new TextArea(10,40));
    
	    uusi.addActionListener(this);   
	    avaa.addActionListener(this);
	    tallenna.addActionListener(this);
	    kopioi.addActionListener(this);
	    liita.addActionListener(this);
	    addWindowListener(this);
		setVisible(true);
	}
	
	
	public void windowClosing(WindowEvent e)
	{	System.exit(0);
	}
	public void windowClosed(WindowEvent e)  {}
	public void windowDeiconified(WindowEvent e)  {}
	public void windowIconified(WindowEvent e)  {}
	public void windowActivated(WindowEvent e)  {}
	public void windowDeactivated(WindowEvent e)  {}
	public void windowOpened(WindowEvent e)  {}
	
	public void actionPerformed(ActionEvent e) {
     	
     	if (e.getActionCommand().equals("Uusi")) {
     		alue.selectAll();	
          alue.replaceText("",alue.getSelectionStart(),alue.getSelectionEnd());
       	}

        if (e.getActionCommand().equals("Avaa")) {
          FileReader filer = null;
	      try {
	      	filer = new FileReader(tiedosto.getText());
	      } catch(IOException f){
		      tiedosto.setText("Virhe luotaessa lukuvirtaa");
	    }

	    BufferedReader buffr = new BufferedReader(filer);
	    try {
	      String rivir = null;
	      do { 
	        rivir = buffr.readLine();
	        if (rivir != null){
	        	 alue.appendText(rivir);
	     		 alue.appendText("\n");
	        }
	       }
	       while (rivir != null); 
	      buffr.close();
  	    } catch(IOException f){
	      	tiedosto.setText("Virhe luotaessa lukuvirtaa");
	    }
       }

       if (e.getActionCommand().equals("Tallenna")) {
          FileWriter filew = null;
          try {
		      filew = new FileWriter(tiedosto.getText());
	     } catch(IOException f){
	 	     tiedosto.setText("Virhe luotaessa tulostusvirtaa");
	    }
	    BufferedWriter buffw = new BufferedWriter(filew);
	    alue.selectAll();
	    String riviw =alue.getSelectedText();
	    try {
	      	buffw.write(riviw);
	       	buffw.close();
	    } catch(IOException f){
	      		tiedosto.setText("Virhe luotaessa tulostusvirtaa");
   		  }
       }   

       if (e.getActionCommand().equals("Leikkaa")) {
          leikepoyta = alue.getSelectedText();
          alue.replaceText("",alue.getSelectionStart(),alue.getSelectionEnd());
       }

       if (e.getActionCommand().equals("Kopioi")) {
          leikepoyta = alue.getSelectedText();
       }

       if (e.getActionCommand().equals("Liitä")) {
          alue.replaceText(leikepoyta,alue.getSelectionStart(),alue.getSelectionEnd());
       }
   }

}