Saving and redrawing image from stack

Question

Hi ,
I have a small problem with images...I create BufferedImage which i save on stack everytime i click on a mouse button , but when i try to reacall that image from stack i dont get nothing or the last Image i made.
This is the short description of my prog. :
I have a main class that extends JFrame and inner class that extends JPanel and has a mouse listener , ... in this inner class everytime i press a mouse button i send image on stack , and problems i have is when i press a button declared in my main class to pop image from stack and paint it on my inner JPanel class i dont know how to implement this.
So if anyone can help...please doooo

Answer 1

I appologise...everytime i pasted code i forgot to change something...small tweeks...but now it work I tried it...before it didnt compile cos of small tweeks...but now it woks...I hope u ll see my problem when i hit undo button...everything is gone...maybe i need to create a new image to send on stack or something and load that image when i hit undo button...i dont know???
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.util.*;
public class PainterDemo extends JFrame implements ActionListener{
       Stack stack=new Stack();
       BufferedImage image=new                                     BufferedImage(400,400,BufferedImage.TYPE_4BYTE_ABGR);
       Graphics graphic=image.getGraphics();
       Panel panel=new Panel();
       JButton white=new JButton();
       JButton black=new JButton();
       JButton yellow=new JButton();
       JButton blue=new JButton();
       JButton red=new JButton();
       JButton green=new JButton();
       JButton orange=new JButton();
       JButton pink=new JButton();
       JButton magenta=new JButton();
       JButton undo=new JButton("undo");
       JPanel selectedColor=new JPanel();
       JLabel startXst=new JLabel("0");
       JLabel startYst=new JLabel("0");
       JLabel middleXst=new JLabel("0");
       JLabel middleYst=new JLabel("0");
       JLabel endXst=new JLabel("0");
       JLabel endYst=new JLabel("0");
       Color background=new Color(224,126,0);
       Container content=this.getContentPane();
       public void adding(){
              content.setLayout(null);
              content.setBackground(background);
              selectedColor.setBackground(Color.BLACK);
              white.setBackground(Color.WHITE);
              black.setBackground(Color.BLACK);
              yellow.setBackground(Color.YELLOW);
              blue.setBackground(Color.BLUE);
              red.setBackground(Color.RED);
              green.setBackground(Color.GREEN);
              orange.setBackground(Color.ORANGE);
              pink.setBackground(Color.PINK);
              magenta.setBackground(Color.MAGENTA);
              this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              this.setSize(600,600);
              this.setLocation(150,90);
              undo.setBounds(190,128,100,34);
              white.setBounds(5,170,30,30);
              black.setBounds(37,170,30,30);
              yellow.setBounds(69,170,30,30);
              blue.setBounds(5,202,30,30);
              red.setBounds(37,202,30,30);
              green.setBounds(69,202,30,30);
              orange.setBounds(5,234,30,30);
              pink.setBounds(37,234,30,30);
              magenta.setBounds(69,234,30,30);
              selectedColor.setBounds(40,380,60,30);
              panel.setBounds(190,164,400,400);
              panel.requestFocus();
              startXst.setBounds(85,440,60,20);
              startYst.setBounds(85,460,60,20);
              middleXst.setBounds(85,480,60,20);
              middleYst.setBounds(85,500,60,20);
              endXst.setBounds(85,520,60,20);
              endYst.setBounds(85,540,60,20);
              content.add(white);
              content.add(black);
              content.add(yellow);
              content.add(blue);
              content.add(red);
              content.add(green);
              content.add(orange);
              content.add(pink);
              content.add(magenta);
              content.add(startXst);
              content.add(startYst);
              content.add(middleXst);
              content.add(middleYst);
              content.add(endXst);
              content.add(endYst);
              content.add(panel);
              content.add(selectedColor);
              content.add(undo);
              undo.addActionListener(this);
              white.addActionListener(this);
              black.addActionListener(this);
              yellow.addActionListener(this);
              blue.addActionListener(this);
              red.addActionListener(this);
              green.addActionListener(this);
              orange.addActionListener(this);
              pink.addActionListener(this);
              magenta.addActionListener(this);
              this.setVisible(true);
       public PainterDemo(){
              adding();
       public static void main(String[]args){
              new PainterDemo();
       public void actionPerformed(ActionEvent e) {
              Object button=e.getSource();
                     if(button==undo){//HERE I CALL MY IMAGE FROM STACK AND I SORT OF REPAINT IT...BUT IT DOES NOT WORK
                            BufferedImage temp=(BufferedImage)stack.pop();
                            panel.paint(temp.getGraphics());
                            panel.repaint();
       else if(button==white){
              selectedColor.setBackground(Color.WHITE);
       else if(button==black){
              selectedColor.setBackground(Color.BLACK);
       else if(button==yellow){
              selectedColor.setBackground(Color.YELLOW);
       else if(button==blue){
              selectedColor.setBackground(Color.BLUE);
       else if(button==red){
              selectedColor.setBackground(Color.RED);
       else if(button==green){
              selectedColor.setBackground(Color.GREEN);
       else if(button==orange){
              selectedColor.setBackground(Color.ORANGE);
       else if(button==pink){
              selectedColor.setBackground(Color.PINK);
       else if(button==magenta){
              selectedColor.setBackground(Color.MAGENTA);
       class Panel extends JPanel implements MouseListener,MouseMotionListener{
              public Panel(){
              this.addMouseListener(this);
              this.addMouseMotionListener(this);
       public void mouseClicked(MouseEvent e) {
       public void mousePressed(MouseEvent e) {
              int startX=e.getX();
              int startY=e.getY();
              startXst.setText(Integer.toString(startX));
              startYst.setText(Integer.toString(startY));
       public void mouseReleased(MouseEvent e) {
              int endX=e.getX();
              int endY=e.getY();
              endXst.setText(Integer.toString(endX));
              endYst.setText(Integer.toString(endY));
       stack.push(image);//HERE I PUSH MY IMAGE ON STACK OR AT LEAST I THINK SO
       public void mouseEntered(MouseEvent e) {
       public void mouseExited(MouseEvent e) {
       public void mouseDragged(MouseEvent e) {
              int xStart=Integer.parseInt(startXst.getText());
              int yStart=Integer.parseInt(startYst.getText());
              int x=e.getX();
              middleXst.setText(Integer.toString(x));
              int y=e.getY();
              middleYst.setText(Integer.toString(y));
              graphic=image.getGraphics();
              graphic.setColor(selectedColor.getBackground());
              graphic.drawLine(xStart,yStart,x,y);
       startXst.setText(Integer.toString(x));
       startYst.setText(Integer.toString(y));
       repaint();
       public void mouseMoved(MouseEvent e) {
       public void paint(Graphics g){
       super.paint(g);
       if(image!=null){
       g.drawImage(image,0,0,this);
}//this was missing for me