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JFileChooser
1 Answer(s)      4 years and a month ago
Posted in : Java Beginners


How to create a GUI application that allows a user to select a text file (using the JFileChooser). The program will then count the number of words in the selected file and display the result containing the name of the file, its size (in bytes) and the number of word it contains.

(Hint: You can use the StringTokenizer class or the String split() method to count the number of words which are separated by whitespace characters such space and tab)

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March 15, 2010 at 4:54 PM


Hi Friend,

Try the following code:

import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.*;
public class CountWordsFromFile extends JFrame {

JButton button;
JPanel p;
JLabel l1,l2,l3;
String dirName = "C:\\Answers\\ImagesAndText\\";
int count=0;

CountWordsFromFile(){
p=new JPanel(new GridLayout(4,1));
l1=new JLabel();
l2=new JLabel();
l3=new JLabel();
button=new JButton("Get File Details");
p.add(l1);
p.add(l2);
p.add(l3);
p.add(button);

l1.setVisible(false);
l2.setVisible(false);
l3.setVisible(false);
add(p);
setVisible(true);
pack();
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File(dirName));
chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);

FileNameExtensionFilter filter = new FileNameExtensionFilter(
".txt and .java files", "txt", "java");
chooser.setFileFilter(filter);

try {
int code = chooser.showOpenDialog(null);
if (code == JFileChooser.APPROVE_OPTION) {
File selectedFile = chooser.getSelectedFile();
Scanner input = new Scanner(selectedFile);
while (input.hasNext()) {
++count;
input.next();
}
String f=selectedFile.getName();
long size=selectedFile.length();
l1.setText("File Name is: "+f);
l2.setText("File Size is: "+Long.toString(size));
l3.setText("No of words : "+Integer.toString(count));
l1.setVisible(true);
l2.setVisible(true);
l3.setVisible(true);

}

} catch (Exception f) {
f.printStackTrace();
}
}
});
}
public static void main(String[] a) {
CountWordsFromFile c=new CountWordsFromFile();
}
}

Thanks


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