PR24

package pkgApplet;
 
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
 
 
public class pr22 extends Applet implements ActionListener {
/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
 
package pkgApplet;
 
import java.applet.Applet;
import java.awt.Button;
import java.awt.GridLayout;
import java.awt.List;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
/**
 *
 * @author smit
 */
public class pr24 extends Applet implements ActionListener{
Button b1,b2;
List li;
TextField tf;
    /**
     * Initialization method that will be called after the applet is loaded into
     * the browser.
     */
    public void init() {
        // TODO start asynchronous download of heavy resources
        b1=new Button("ADD");
        b2=new Button("REMOVE");
        li=new List(10);
        tf=new TextField();
        setLayout(new GridLayout(0,1));
        add(tf);
        add(b1);
        add(b2);
        add(li);
 
        b1.addActionListener(this);
        b2.addActionListener(this);
    }
 
    public void actionPerformed(ActionEvent e){
        String s;
 
        if(e.getSource()==b1){
            s=tf.getText();
            li.add(s);
        }
        try{
        if(e.getSource()==b2){
            s=li.getSelectedItem();
            li.remove(s);
        }
        }catch(IllegalArgumentException err){
            System.out.println("Runtime Exception : "+err);
        }
    }
    // TODO overwrite start(), stop() and destroy() methods
}
 
    FileReader fr;
    FileWriter fw;
    TextArea ta;
    Button b1, b2;
 
    @Override
    public void init() {
        ta = new TextArea(10, 20);
        b1 = new Button("READ");
        b2 = new Button("WRITE");
 
        b1.addActionListener(this);
        b2.addActionListener(this);
        add(b1);
        add(b2);
        add(ta);
    }
 
    @Override
    public void actionPerformed(ActionEvent e) {
 
        if (e.getSource() == b1) {
            try {
                fr = new FileReader("Hello.txt");
                char c[] = new char[50];
                fr.read(c);
                ta.append(new String(c));
            } catch (IOException ai) {
                System.out.println(ai);
            }
        }
 
        if (e.getSource() == b2) {
            try {
                fw = new FileWriter("Hello.txt");
                fw.write("hello I'm Smit ;) \n");
                fw.close();
            } catch (IOException is) {
                System.out.println(is);
            }
        }
    }
 
}