+-------------------------- + ---(1)
 | +-------------- + |
 | | | |
 | | TextArea | |
 | | | |
 | | | |
 | +-------------- + |
 +-------------------------- +
 | small | <== push
 +-------------------------- +

 +-------------------------- +---(2)
 | +------ + |
 | | Text | |
 | | Area | | : Text area becomes small.
 | +------ + |
 | |
 | |
 +-------------------------- +
 | small |
 +-------------------------- +


(3) Resizing Appletviewer Window:
 +-------------------------- +
 | +-------------- + |
 | | | |
 | | TextArea | | : Size of TextArea becomes
 | | | | same as original.
 | | | |
 | +-------------- + |
 +-------------------------- +
 | small |
 +-------------------------- +


 sample program:

import java.awt.*;
import java.applet.*;

public class area extends java.applet.Applet{
    TextArea tv;
    Panel cpal;
    Checkbox cm;

    public void init() {
        resize(900, 500);
        tv = new TextArea("123456", 10, 20);
        setLayout(new BorderLayout(0,0));
        Panel tpal = new Panel();
        tpal.add(tv);
        cpal = new Panel();
        cpal.setLayout(new GridLayout(1,1));
        cm = new Checkbox("Small",null,true);
        cpal.add(cm);
        add("South",cpal);
        add("Center",tpal);
    }
    public boolean action(Event e, Object obj) {
        if(e.target instanceof Checkbox){
            Checkbox cb = (Checkbox)e.target;
            if(cb.getLabel().equals("Small")){
                tv.setBounds(20,20,100,100);
                return false;
            }
        }
        return false;
    }
}