BCA JAVA 2015 SLIP 21

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Slip21 extends JFrame implements ActionListener

{

        JLabel ltext, lfind, lreplace, loccurance;

        JTextArea text;

        JTextField findText, replaceText, occurrenceText;

        JButton find, replace, clear;

        JPanel pan1,pan2;

        int occurrences=0,i=0;

        Slip21()

        {

         

                  ltext= new JLabel("Enter Text : ");

                  lfind = new JLabel("Text to Find : ");

           lreplace = new JLabel("Text to Replace : ");

                  loccurance = new JLabel("No.of Occurrences : ");

                text = new JTextArea(1,20);

                findText = new JTextField(20);

                replaceText = new JTextField(20);

                occurrenceText = new JTextField(20);

                pan1 = new JPanel();

                pan1.setLayout(new GridLayout(4,2));

                pan1.add(ltext);

                pan1.add(text);

                pan1.add(lfind);

                pan1.add(findText);

                pan1.add(lreplace);

                pan1.add(replaceText);

                pan1.add(loccurance);

                pan1.add(occurrenceText);

                find = new JButton("Find");

                replace = new JButton("Replace");

                clear= new JButton("Clear");

                find.addActionListener(this);

                replace.addActionListener(this);

                clear.addActionListener(this);

                pan2 = new JPanel();

                pan2.setLayout(new FlowLayout());

                pan2.add(find);

                pan2.add(replace);

                pan2.add(clear);

              

                add(pan1,"Center");

                add(pan2,"South");

                setTitle("Find And Replace");

                setSize(300, 200);

                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                setVisible(true);

        }

     

        public void actionPerformed(ActionEvent ae)

        {

              

                if(ae.getSource() == find)

                {

                       String s = text.getText();

                        String f = findText.getText();

                        i = s.indexOf(f);

                         if(i != -1)

                        { occurrences++;

                                occurrenceText.setText(Integer.toString(occurrences));

                                text.select(i,i+f.length());

                                text.requestFocus();

                       

                        }

                }

                if(ae.getSource() == replace)

                {

                        if(text.getSelectedText().length()!=0)

                        {

                                String r = replaceText.getText();

                                text.replaceSelection(r);

                        }

                }

                if(ae.getSource() == clear)

                {

                 text.setText("");

                 findText.setText("");

                 replaceText.setText("");

                 occurrenceText.setText("");

                }

         }

     

         public static void main(String[] args)

         {

            new Slip21();

         }

}