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attach two buttons on the frame

  Asked By: Diem    Date: Oct 11    Category: Java    Views: 867
  

i tried to attach two buttons on the frame

save1 : To save data into the Test.txt file through I/O operation

open1 : To retreive data from the Test.txt file through I/O operation

The problem is actionPerformed(....) is not allowing to apply throws IOException
it being overridden method of ActionListener class.

if i dont apply throws.....than error is exception has to be applied and no
compilation is executed.

the codes with the errors are being give below

ERRORS:

=====================================

D:\java\I.O\Framet.java:58: unreported exception java.io.IOException; must be
caught or declared to be thrown
saveData(text1.getText());
^
D:\java\I.O\Framet.java:64: unreported exception java.io.IOException; must be
caught or declared to be thrown
openData();
^
2 errors

Tool completed with exit code 1


CODES

============================================================

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


public class Framet
{

public static void main(String[]args) throws IOException
{
Button1 f = new Button1();
f.frame();

}
}

class Button1 implements ActionListener
{
Button save1,open1,exit;
TextArea text1;
FlowLayout flow;

public void frame()
{

Frame frame = new Frame("Frame");

flow = new FlowLayout();
frame.setLayout(flow);
frame.setBounds(0,0,500,500);

text1 = new TextArea(5,30);

save1 = new Button("Save");
open1 = new Button("Open");
exit = new Button("Exit");

frame.add(text1);

frame.add(save1);
frame.add(open1);
frame.add(exit);

frame.setVisible(true);

save1.addActionListener(this);
open1.addActionListener(this);
exit.addActionListener(this);

}

public void actionPerformed(ActionEvent ee)
{

if(ee.getSource() == save1)
{
String text2 = text1.getText();
saveData(text1.getText());

}

if(ee.getSource() == open1)
{
openData();
}

if(ee.getSource() == exit)
{
System.exit(0);
}
}

public void saveData(String text2) throws IOException
{
char[] textArray = text2.toCharArray();
FileOutputStream oFile = new FileOutputStream("Test.txt");
for(int i=0;i<textArray.length;i++)
{
oFile.write(textArray[i]);
}

oFile.close();
}

public void openData() throws IOException
{
File file = new File("Test.txt");
System.out.println("Path is "+file.getAbsolutePath());
FileInputStream iFile = new FileInputStream(file);

int data;
String string;
char value = 'q';

Character chart = new Character('a');


while( (data = iFile.read()) != -1)
{
value = (char)data;
string = chart.toString(value);
text1.append(string);
}

iFile.close();

}

}

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