Images Browser Dialog gets OutOfMemoryError no stack trace available

Question

Hello all.
I am writing a dialog to list the image by showing their thumbnail, which like the style of ACDSee or CoffeeCup Free Viewer Plus.
For this, I build 3 objects(thumbCanvas,thumbPanel,testingfrm). thumbCanvas - displays the thumbnail with aspect ratio as original image
thumbPanel - contains thumbCanvas and image file name
testingfrm - put the thumbPanel of the list of images row by row
When I run testingfrm by listing 11 images, the following error is given out.
java.lang.OutOfMemoryError
<<no stack trace available>>
I would be appreciated if anyone can suggest the methodology and hints to do that or state what is the problem of my coding and methodology. Thanks.
The code of 3 objects are as following:
//thumbCanvas.java
import java.awt.*;
import java.io.*;
public class thumbCanvas extends Canvas {
public int new_h=0, new_w=0;
private double thumb_h, thumb_w;
private double img_h, img_w;
private double ratio_h, ratio_w, ratio_thumb;
private String imgFileName;
private Image thumbImg;
/** Creates new thumbCanvas */
public thumbCanvas(int w, int h) {
thumb_h = h;
thumb_w = w;
public thumbCanvas(String f, int w, int h) {
imgFileName = f;
thumb_h = h;
thumb_w = w;
setFile(imgFileName);
public void setThumbSize(int w, int h) {
thumb_h = h;
thumb_w = w;
repaint();
public void setImage(Image i) {
MediaTracker tracker = new MediaTracker(this);
thumbImg = i;
tracker.addImage(thumbImg,1);
try {
tracker.waitForAll();
} catch (java.lang.InterruptedException e) {}
if (tracker.checkAll()) {
img_h = thumbImg.getHeight(this);
img_w = thumbImg.getWidth(this);
if (img_h > thumb_h || img_w > thumb_w) {
ratio_h = thumb_h/img_h;
ratio_w = thumb_w/img_w;
ratio_thumb = java.lang.Math.min(ratio_h,ratio_w);
} else {
ratio_thumb = 1;
new_h = (int)(img_h*ratio_thumb);
new_w = (int)(img_w*ratio_thumb);
setSize(new_w, new_h);
repaint();
public void setFile(String f) {
Image img = Toolkit.getDefaultToolkit().getImage(f);
setImage(img);
public void paint(Graphics gr) {
if ( thumbImg != null ) {
gr.drawImage(thumbImg, 0, 0, new_w, new_h, this);
//thumbPanel.java
import javax.swing.*;
import java.io.*;
public class thumbPanel extends JPanel {
/** Creates new form thumbPanel */
public thumbPanel(String f, int w, int h) {
int thumb_w, thumb_h, thumb_x;
int label_w, label_h;
initComponents();
thumb_w = (int)(w*0.9);
thumb_h = (int)(h*0.7);
label_w = (int)(w*0.9);
label_h = (int)(h*0.2);
tc = new thumbCanvas(f, thumb_w, thumb_h);
thumb_x = (int)((w - tc.new_w)/2);
tc.setLocation(thumb_x,5);
add(tc);
thumbLabel = new JLabel("hihi");
add(thumbLabel);
thumbLabel.setBounds(thumb_x,thumb_h+1,label_w,label_h);
setSize(w,h);
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
private void initComponents() {//GEN-BEGIN:initComponents
setLayout(null);
setBorder(new javax.swing.border.BevelBorder(javax.swing.border.BevelBorder.RAISED));
}//GEN-END:initComponents
// Variables declaration - do not modify//GEN-BEGIN:variables
// End of variables declaration//GEN-END:variables
private JLabel thumbLabel;
thumbCanvas tc;
//testingfrm.java
public class testingfrm extends javax.swing.JDialog {
/** Creates new form testingfrm */
public testingfrm(java.awt.Frame parent, boolean modal) {
super(parent, modal);
initComponents();
int i;
int row,col;
for (i=1;i<=11;i++) {
row = (int)((i-1)/3);
col = ((i-1)%3)+1;
tp = new thumbPanel("D:\\ACN\\MultiMed\\Oracle\\images\\ts\\add0000" + i + ".jpg",120,120);
tp.setLocation(col*120,row*120);
getContentPane().add(tp);
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
private void initComponents() {//GEN-BEGIN:initComponents
getContentPane().setLayout(null);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
closeDialog(evt);
pack();
}//GEN-END:initComponents
/** Closes the dialog */
private void closeDialog(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_closeDialog
setVisible(false);
dispose();
System.exit(0);
}//GEN-LAST:event_closeDialog
* @param args the command line arguments
public static void main(String args[]) {
new testingfrm(new javax.swing.JFrame(), true).show();
// Variables declaration - do not modify//GEN-BEGIN:variables
// End of variables declaration//GEN-END:variables
thumbPanel tp;
Sorry for putting the code here. However, I hope it can be helpful for solving my problem. Thanks again.

Answer 1

Thanks. The problem is already solved.
It is because I load too much full size images. When I load the resized images generated by Image.getScaledInstance(int,int,int). It seems much better.
Thanks again your suggestion.