This is just some sloppy code i quickly wrote.
It simply counts the amount of lines in all files you select.
extensions -> only processes files, which have one of the extensions
count empty lines -> counts empty lines when toggled
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class LinesCounter extends JPanel {
public static void main(String[] args) {
LinesCounter linesCounter = new LinesCounter();
}
private final JFrame frame;
private final JCheckBox countEmptyLines;
private final JTextField extensions;
private final JButton chooseFiles;
private final JLabel label;
private JFileChooser fileChooser;
private File[] files;
private int returnVal;
private final ArrayList<String> extensionStrings;
private final ActionListener chooseFilesListener = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
fileChooser.setMultiSelectionEnabled(true);
returnVal = fileChooser.showDialog(LinesCounter.this, "Choose Files");
if (returnVal == JFileChooser.APPROVE_OPTION) {
files = fileChooser.getSelectedFiles();
JOptionPane.showMessageDialog(null,
"" + countLines(files, getExtensions(), countEmptyLines.isSelected()),
"Amount of lines", JOptionPane.INFORMATION_MESSAGE);
}
}
};
public LinesCounter() {
super(new GridLayout(4, 1));
extensionStrings = new ArrayList<String>();
countEmptyLines = new JCheckBox("count empty lines");
extensions = new JTextField();
chooseFiles = new JButton("choose files");
chooseFiles.addActionListener(chooseFilesListener);
label = new JLabel("eg:.java;.doc;.class");
this.add(countEmptyLines);
this.add(extensions);
this.add(label);
this.add(chooseFiles);
frame = new JFrame();
frame.add(this);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
private int countLines(final File[] files, final String[] extensions,
final boolean countEmptyLines) {
if (files == null) {
return 0;
}
int lines = 0;
for (final File file : files) {
lines += countLines(file, extensions, countEmptyLines);
}
return lines;
}
private int countLines(final File file, final String[] extensions, final boolean countEmptyLines) {
if (file == null || !file.exists()) {
return 0;
}
if (file.isDirectory()) {
int lines = 0;
final File[] files = file.listFiles();
if (files != null && files.length > 0) {
for (final File f : files) {
lines += countLines(f, extensions, countEmptyLines);
}
}
return lines;
} else {
final String fileName = file.getName();
if (fileName != null && stringEndsWith(fileName, extensions)) {
try {
final BufferedReader bR = new BufferedReader(new FileReader(file));
String line = bR.readLine();
int lines = 0;
while (line != null) {
if (!line.isEmpty()) {
lines++;
} else {
if (countEmptyLines) {
lines++;
}
}
line = bR.readLine();
}
bR.close();
return lines;
} catch (IOException e) {
e.printStackTrace();
}
}
}
return 0;
}
private boolean stringEndsWith(final String string, final String... extensions) {
if (string == null || extensions == null) {
return false;
}
for (final String extension : extensions) {
if (string.endsWith(extension)) {
return true;
}
}
return false;
}
private String[] getExtensions() {
final Scanner scanner = new Scanner(extensions.getText());
scanner.useDelimiter(";");
extensionStrings.clear();
while (scanner.hasNext()) {
extensionStrings.add(scanner.next());
}
scanner.close();
return extensionStrings.toArray(new String[extensionStrings.size()]);
}
}
