FileCopy.java

import java.io.*;               // for file input/output
import javax.swing.*;               // required for input dialogs
import javax.swing.filechooser.FileFilter;  // for choosing file name

public class FileCopy {

    /**
    *   Program:    FileCopy.java
    *   Purpose:    Copy a text file to another file or directory
    *   Creator:    Chris Clarke
    *   Created:    26.12.2012
    *   Modified:   26.05.2013 for verbose type: java FileCopy -v
    *           31.05.2013 MyTextFilter added (*.java, *.txt)
    */

    public static void main(String[] args) {
        boolean ver = false;
        if (args.length>0) {
            if (args[0].equals("-v")) {
                ver = true;
            } else {
                System.out.println("Type \"-v\" for verbose");
            }//end if
        }//end if
        String allText = openTextFile(ver);
        saveAsTextFile( allText);
    }// end main

    public static String openTextFile(boolean verbose) {
        String textInput = "";
        try {
            // open a file chooser
            JFileChooser chooser = new JFileChooser();
            chooser.setCurrentDirectory(new File("."));
            chooser.setFileFilter(new MyTextFilter());
            if (chooser.showOpenDialog(null) != 1) { // not cancel button
                String filename = chooser.getSelectedFile().getPath();
                if (filename != null) {
                    String str=" "; // anything but null
                    BufferedReader fr = new BufferedReader(new FileReader( filename));
                    LineNumberReader lnr = new LineNumberReader(fr);
                    while (str != null) {
                        str = lnr.readLine();
                        if (str==null) break;
                        if (verbose) {
                            System.out.println(str); // display text
                        }//end if
                        // add text to textInput
                        textInput += str + "\r\n";
                    }//end while
                    lnr.close();
                    fr.close();
                }//end if
            } else {//file dialog closed
                System.out.println("Program closing");
                System.exit(1);
            }//end if
        }
        catch (IOException x) {
            System.out.println("Caught IOException");
        }
        return textInput;
    }// end openTextFile

    public static void saveAsTextFile(String completeText) {
        // open a file chooser
        JFileChooser chooser = new JFileChooser();
        chooser.setCurrentDirectory(new File("."));
        chooser.setFileFilter(new MyTextFilter());
        chooser.setAcceptAllFileFilterUsed(true);
        if (chooser.showSaveDialog(null) == 1) {
            System.out.println("File not copied!");
            return; // cancel button
        }//end if
        String filename = chooser.getSelectedFile().getPath();
        if (filename == null) {
            System.out.println("File not copied!");
            return;
        }//end if
        try {
            BufferedWriter fw = new BufferedWriter(new FileWriter( filename));
            fw.write(completeText);
            fw.close();
            System.out.println("File copied successfully.");
        }
        catch (IOException x) {
            System.out.println("Caught IOException");
        }
    }// end saveAsTextFile
}// end class

class MyTextFilter extends FileFilter {
    public boolean accept(File f) {
        return f.getName().toLowerCase().endsWith(".txt") ||
         f.getName().toLowerCase().endsWith(".java") ||  f.isDirectory();
    }

    public String getDescription() {
        return "Text File (*.txt, *.java)";
    }
}//end class