IcoGen.java

import javax.swing.*;
import java.io.*;

public class IcoGen {
    private String[] namesPNG, namesJPG, namesGIF;
    public String[] combined;
    public int cmbL;
    private String dir;
    private String line;
    private String comm;
    public ImageIcon[] icons;
    public String[] ListFiles() {
        File dir = new File("C:/Users/dubstep/Pictures/");
        namesPNG = dir.list(new FilenameFilter() {
            public boolean accept(File dir, String name) {
                return name.endsWith(".png");
            }
        });
        namesJPG = dir.list(new FilenameFilter() {
            public boolean accept(File dir, String name) {
                return name.endsWith(".jpg");
            }
        });
        namesGIF = dir.list(new FilenameFilter() {
            public boolean accept(File dir, String name) {
                return name.endsWith(".gif");
            }
        });
        combined = new String[namesPNG.length + namesJPG.length + namesGIF.length];
        int combLenght = namesPNG.length + namesJPG.length;
        System.arraycopy(namesPNG, 0, combined, 0, namesPNG.length);
        System.arraycopy(namesJPG, 0, combined, namesPNG.length, namesJPG.length);
        System.arraycopy(namesGIF, 0, combined, combLenght, namesGIF.length);
        cmbL = combined.length;
        return combined;
    }
    public void writeToFile() throws IOException {

            BufferedWriter writeNow = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("pics.txt"),"utf-8"));
            for (int i = 0; i < cmbL; i++) {
                writeNow.write(combined[i]);
                writeNow.newLine();
            } writeNow.close();
    }
    public Icon[] icoRead() throws IOException {
        BufferedReader read = new BufferedReader(new InputStreamReader(new FileInputStream("pics.txt"),"utf-8"));
        dir = "C/Users/dubstep/Pictures/";
        for (int j = 0; j < cmbL; j++) {
           line = read.readLine();
           comm = dir+line;
           icons[j] = new ImageIcon(this.getClass().getClassLoader().getResource(comm));
        }
        read.close();
        return icons;
    }

}