Simple Keyword Counter

This program counts how many times a particular word appears inside a text area. JApplet class is used here to display the graphical components.

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import java.awt.*; import java.awt.event.*; import javax.swing.*; public class KeywordCounter extends JApplet{ private JTextField tfkeyword=null; private JLabel lresult=null; private JTextArea tacontent=null; private JButton bcount=null; public void init() { setSize(400,500); setLayout(new BorderLayout()); JPanel ptop=new JPanel(); ptop.setLayout(new FlowLayout()); tfkeyword=new JTextField(); tfkeyword.setColumns(10); ptop.add("North",tfkeyword); lresult=new JLabel(); ptop.add("North",lresult); getContentPane().add("North",ptop); tacontent=new JTextArea(); tacontent.setLineWrap(true); tacontent.setColumns(20); tacontent.setRows(15); getContentPane().add("Center",tacontent); bcount=new JButton("Click Me"); bcount.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String tempkeyword=tfkeyword.getText().toLowerCase(); String tempcontent=tacontent.getText().toLowerCase(); int counter=0; int indexsearch=0; while(true){ int i=tempcontent.indexOf(tempkeyword,indexsearch); if(i==-1){ break; } else{ counter++; tempcontent=tempcontent.substring(tempcontent.indexOf(tempkeyword)+tempkeyword.length()); System.out.println(indexsearch); } } lresult.setText(counter+""); } }); getContentPane().add("South",bcount); } public void destroy() { } }