focusLost
Applet : When user enter Password in TextField, if it is less that 8 characters long, display a Dialog “Invalid Password” otherwise display the password in TextArea.
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class FrameMouseFocus extends Applet implements FocusListener,ActionListener
{
Frame f;
TextArea ta1;
TextField tf1;
Dialog d1;
Button b1;
Label l1;
public void init()
{
f = new Frame();
ta1=new TextArea(10,15);
tf1=new TextField(10);
l1 = new Label("Enter Password : ");
add(l1);
add(tf1);
add(ta1);
tf1.requestFocus();
tf1.setEchoChar('*');
tf1.addFocusListener(this);
}
public void focusLost(FocusEvent f1)
{
if(tf1.getText().length() < 8)
{
d1 = new Dialog(f,"Invalid Password");
b1 = new Button("OK");
d1.setSize(150,100);
d1.setVisible(true);
d1.add(b1);
b1.addActionListener(this);
tf1.setText("");
}
else
{
ta1.append(tf1.getText()+"\n");
tf1.setText("");
tf1.requestFocus();
}
}
public void actionPerformed(ActionEvent a)
{
if(a.getSource() == b1)
{
d1.setVisible(false);
tf1.requestFocus();
}
}
public void focusGained(FocusEvent f)
{
}
}
Click new -> File -> html and save this file as FrameMouseFocus.html
<BODY>
<Applet code=FrameMouseFocus.class height=200 width=400 >
</Applet>
</BODY>
