How can I store/retrieve PNG images in/from RMS?

I see that it can be done for gif and jpg as shown in the code that follows at the end of this message.

However, it doesn't mention PNG in the above link. Will it work for PNG images as well?

Here's the code:

The example below saves JPG file into RMS and shows it on mobile. Data like image, image name, width, height can be stored in RMS. The size of the image file do matters if phone capacity is small. Also some mobiles do not support JPG/GIF type images. In those cases, the image(s) cannot be stored.
Java Code:
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
import javax.microedition.rms.*;
import java.io.*;

public class ImageStore extends MIDlet  implements CommandListener {
    
    private Command CmdExit;
    private Command CmdOpen;
    private Command CmdBack;
    private Command CmdSave;
    private Display display;
    RecordStore rStore;
    Form form = null;
    Image image = null;
    InputStream is =null;
    
    public ImageStore() {
        
        rStore = null;
        
        display = Display.getDisplay(this);
        
        CmdExit = new Command("Exit", 1, 2);
        CmdOpen = new Command("Show", 1, 3);
        CmdBack = new Command("Back", 1, 3);
        CmdSave = new Command("Save", 1, 3);
        
        form = new Form("Image Show");
        
    }
    
    public void startApp() {
        try {
            rStore = RecordStore.openRecordStore("imagefile", true);
        } catch(RecordStoreException recordstoreexception) {
            recordstoreexception.printStackTrace();
        }
        try {
            
            is = getClass().getResourceAsStream("/leaf.jpg");
            image = Image.createImage(is);            
            form.append(image);
            
        } catch(IOException ioexception) { }
        form.addCommand(CmdExit);
        form.addCommand(CmdSave);
        form.addCommand(CmdOpen);
        form.setCommandListener(this);
        display.setCurrent(form);
    }
    
    public void pauseApp() {
    }
    
    public void Close() {
        try {
            rStore.closeRecordStore();
        } catch(RecordStoreNotOpenException recordstorenotopenexception) {
            recordstorenotopenexception.printStackTrace();
        } catch(RecordStoreException recordstoreexception) {
            recordstoreexception.printStackTrace();
        }
    }
    
    public void destroyApp(boolean flag) {
        Close();
    }
    
    public Image load(int width,int height) {
        
        byte[] b = null;
        String imagename = null;
        Image image = null;
        
        try {
            
            int i = rStore.getNumRecords();
            
            for(int j = 1; j < i + 1; j++) {
                
                if(rStore.getRecord(j) != null) {
                    
                    b = rStore.getRecord(j);
                    ByteArrayInputStream  bin =  
                            new ByteArrayInputStream( b );
                    
                    DataInputStream   din = new DataInputStream( bin );
                    
                    imagename = din.readUTF();
                    int remaining = 
                            (b.length-imagename.getBytes().length-2)/4;
                    
                    int[] rawdata = new int[remaining];
                    
                    for(int k =0 ;k<rawdata.length ;k++) {
                        rawdata[k] = din.readInt();
                    }
                    
                    image = Image.createRGBImage(rawdata,
                            width, height, false);
                    
                    bin.reset();
                    din.close();
                    din =null;
                }
            }
        } catch (IOException e) {
            
            e.printStackTrace();
            
        } catch(RecordStoreException recordstoreexception) {
            
            recordstoreexception.printStackTrace();
            
        }
        
        return image;
    }
    
    public boolean save(Image img, int width,             
            int height, String imgName) {
        
        if (img == null || width < 0 || height < 0 || imgName == null) {
            
            throw new IllegalArgumentException("Check arguments");
            
        }
        
        int[] imgRgbData = new int[width * height];
        
        try {
            
            img.getRGB(imgRgbData, 0, width, 0, 0, width, height);
            
        } catch (Exception e) {
            // Problem getting image RGB data
            return false;
        }
        try {
            // Write image data to output stream (in order to get 
            // the record bytes in needed form)
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            DataOutputStream dos = new DataOutputStream(baos);
            dos.writeUTF(imgName);
            
            for (int i = 0; i < imgRgbData.length; i++) {
                dos.writeInt(imgRgbData[i]);
            }
            
            // Open record store, create if it doesn't exist
            rStore.addRecord(baos.toByteArray(), 0, 
                    baos.toByteArray().length);  // Add record
            
        } catch (RecordStoreNotFoundException rsnfe) {
            // Record storage not found
            return false;
        } catch (RecordStoreException rse) {
            // Other record storage problem
            return false;
        } catch (IOException ioe) {
            // Problem writing data
            return false;
        }
        
        return true; // We've successfuly done
    }
    
    public void commandAction(Command command, Displayable displayable) {
        
        if(command == CmdExit) {
            
            destroyApp(true);
            notifyDestroyed();
            
        } 
        else if(command == CmdOpen) {
            
            Form showform = new Form("Image from DB");
            Image i = load(image.getWidth(),image.getHeight());
            
            if(i !=null ) {
                
                Image img = Image.createImage(i);
                showform.append(img);
                
            }
            
            showform.addCommand(CmdBack);
            showform.setCommandListener(this);
            display.setCurrent(showform);
            
            } else if(command == CmdBack) {
            
                display.setCurrent(form);
                
            } else  if(command == CmdSave) {
            
            byte[] b = null;
            Alert a =new Alert("Image saved");
            
            try {
                if(save(image,image.getWidth(),image.getHeight(),"leaf"))
                    a.setString("Success");
                else
                    a.setString("Failed");
                a.setTimeout(1000);
            } catch (Exception e) {
                e.printStackTrace();
            }
            display.setCurrent(a);
            }
    }
}