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please check this code

1 reply on 1 page. Most recent reply: Jul 3, 2003 2:08 PM by mmm

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lazza

Posts: 3
Nickname: lazza
Registered: Jun, 2003

please check this code

Posted: Jul 3, 2003 1:34 AM

I am trying to write from a textfield to a file. The code I have written appears to be ok with the compiler, but when I try and send it to a file I get an error message in the textfield, can sombody please help
String newdata;

TextField tfn;
Button b1;

private void writedata(String arg) throws IOException
{
DataOutputStream os;
os=new DataOutputStream(new FileOutputStream("c:\\info.txt"));
os.writeBytes(arg);
os.close();
}

public void init()
{
tfn=new TextField(30);
add (tfn);
b1=new Button("Write text");
add(b1);

}
public boolean action(Event evt, Object arg)
{

if(evt.target==b1)
{

newdata=tfn.getText();
try
{
writedata(newdata);
}
catch(java.lang.Exception e) {tfn.setText("error while writing");}
repaint();

}
return true;
}

mmm

Posts: 2
Nickname: m3
Registered: Jul, 2003

Re: please check this code

Posted: Jul 3, 2003 2:08 PM

You might want to add an actionlistener to your button.

So modify your init() to the following:

public void init()
{
tfn=new TextField(30);
add (tfn);
b1=new Button("Write text");

// modification
b1.addActionListener(this);
// modification

add(b1);

}

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