MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.File;

import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;

public class MainClass {

    public static void main(String[] a) {
        JFileChooser fileChooser = new JFileChooser(".");
        FileFilter filter1 = new ExtensionFileFilter("JPG and JPEG", new String[] { "JPG", "JPEG" });
        fileChooser.setFileFilter(filter1);
        int status = fileChooser.showOpenDialog(null);
        if (status == JFileChooser.APPROVE_OPTION) {
            File selectedFile = fileChooser.getSelectedFile();
            System.out.println(selectedFile.getParent());
            System.out.println(selectedFile.getName());
        } else if (status == JFileChooser.CANCEL_OPTION) {
            System.out.println(JFileChooser.CANCEL_OPTION);
        }
    }
}

class ExtensionFileFilter extends FileFilter {
    String description;

    String extensions[];

    public ExtensionFileFilter(String description, String extension) {
        this(description, new String[] { extension });
    }

    public ExtensionFileFilter(String description, String extensions[]) {
        if (description == null) {
            this.description = extensions[0];
        } else {
            this.description = description;
        }
        this.extensions = (String[]) extensions.clone();
        toLower(this.extensions);
    }

    private void toLower(String array[]) {
        for (int i = 0, n = array.length; i < n; i++) {
            array[i] = array[i].toLowerCase();
        }
    }

    public String getDescription() {
        return description;
    }

    public boolean accept(File file) {
        if (file.isDirectory()) {
            return true;
        } else {
            String path = file.getAbsolutePath().toLowerCase();
            for (int i = 0, n = extensions.length; i < n; i++) {
                String extension = extensions[i];
                if ((path.endsWith(extension) && (path.charAt(path.length() - extension.length() - 1)) == '.')) {
                    return true;
                }
            }
        }
        return false;
    }
}