GUI components always make me confuse!

Question

Hi all!
Firstly, The problem I 've just encountered is that: I 'd like to add a JLabel with an icon onto the contentPane of the JFrame, But the Icon canot be drawn. Tell me why?
This is the code:
import javax.swing.*;
import java.awt.*;
class TestLabel extends JFrame {
     public TestLabel(String title) {
          super(title);
          ImageIcon icon = new ImageIcon(getToolkit().getImage("./images/chat.bmp"));
          JLabel lb = new JLabel( icon);
          this.getContentPane ().add(lb, BorderLayout.CENTER);
          this.setSize(300, 300);
          this.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
          this.show();
     public static void main(String [] args) {
          new TestLabel("Test Label with Icon");
Secondly: I would like to make an introduction for my application. So I creat an introduce canvas and then add some text and an Image on to it. But the Image can't not be displayed anyway. I'm going to be crazy with every thing!!!. Help me as soon as posible. This is the code of the Canvas ( JPanel). To test how things are, would you please creat a JFrame and add it on to the contentpane of the frame. Thanks!
package caro;
import java.awt.*;
import javax.swing.*;
import java.awt.image.*;
* <p>Title: Caro Game</p>
* <p>Description: Two player caro game, playing through a Local Area Network</p>
* <p>Copyright: Copyright (c) 2004 Group 8 - Tin 4 - K46</p>
* <p>Company: FIT - HUT</p>
* @author PhuongVM, AnhLT, KienNT, AnhNT
* @version 1.0
class IntroduceCanvas extends JPanel {
private Color pink = new Color(255, 200, 200);
private Color blue = new Color(150, 200, 255);
private int w, h;
private int edge = 16;
private static final String title = "Caro Game";
private static final String name = "Version 1.0-2004";
private static final String foot = "Group 8 - Tin 4 - K46";
private static final String subFoot = "FIT - HUT";
private Font namefont, titlefont, footfont;
Image hutImg;
public IntroduceCanvas() {
titlefont = new Font("SansSerif", Font.BOLD, 58);
namefont = new Font("SansSerif", Font.BOLD, 18);
footfont = new Font("SansSerif", Font.BOLD, 12);
hutImg = getToolkit().getImage("./images/intro.jpg");
// draw the specify String s with specify font, color and position
private void d(Graphics g, String s, Color c, Font f, int y, int off) {
g.setFont(f);
FontMetrics fm = g.getFontMetrics();
g.setColor(c);
g.drawString(s, (w - fm.stringWidth(s)) / 2 + off, y + off);
//Overide the paint method from the parent
public void paintComponent(Graphics g) {
//get the size of the window.
Dimension d = getSize();
w = d.width;
h = d.height;
//set the back ground color to CYAN
g.setColor(Color.CYAN);
g.fillRect(0, 0, w, h);
// draw a blue 3D rectangle to put introduction
g.setColor(blue);
g.fill3DRect(edge, edge, w - 2 * edge, h - 2 * edge, true);
//draw information and logo on to the rectangle
g.clearRect(w/2 - 100/2, edge, 100, 140);
g.drawImage(hutImg, w/2 - 100/2, edge, 100, 140, this);
d(g, title, Color.black, titlefont, h / 2, 1);
d(g, title, Color.white, titlefont, h / 2, -1);
d(g, title, Color.pink, titlefont, h /2 , 0);
d(g, name, Color.black, namefont, h * 3 / 4, 0);
d(g, foot, Color.black, footfont, h * 9/11, 0);
d(g, subFoot, Color.black, footfont, h * 7/8, 0);
Thanks!!

Answer 1

Hi all!
Firstly, The problem I 've just encountered is that: I 'd like to add a JLabel with an icon onto the contentPane of the JFrame, But the Icon canot be drawn. Tell me why?
This is the code:
import javax.swing.*;
import java.awt.*;
class TestLabel extends JFrame {
public TestLabel(String title) {
super(title);
ImageIcon icon = new ImageIcon(getToolkit().getImage("./images/chat.bmp"));
JLabel lb = new JLabel( icon);
this.getContentPane ().add(lb, BorderLayout.CENTER);
this.setSize(300, 300);
this.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
this.show();
public static void main(String [] args) {
new TestLabel("Test Label with Icon");
Secondly: I would like to make an introduction for my application. So I creat an introduce canvas and then add some text and an Image on to it. But the Image can't not be displayed anyway. I'm going to be crazy with every thing!!!. Help me as soon as posible. This is the code of the Canvas ( JPanel). To test how things are, would you please creat a JFrame and add it on to the contentpane of the frame. Thanks!
package caro;
import java.awt.*;
import javax.swing.*;
import java.awt.image.*;
* <p>Title: Caro Game</p>
* <p>Description: Two player caro game, playing through a Local Area Network</p>
* <p>Copyright: Copyright (c) 2004 Group 8 - Tin 4 - K46</p>
* <p>Company: FIT - HUT</p>
* @author PhuongVM, AnhLT, KienNT, AnhNT
* @version 1.0
class IntroduceCanvas extends JPanel {
  private Color pink = new Color(255, 200, 200);
  private Color blue = new Color(150, 200, 255);
  private int w, h;
  private int edge = 16;
  private static final String title = "Caro Game";
  private static final String name = "Version 1.0-2004";
  private static final String foot = "Group 8 - Tin 4 - K46";
  private static final String subFoot = "FIT - HUT";
  private Font namefont, titlefont, footfont;
  Image hutImg;
  public IntroduceCanvas() {
    titlefont = new Font("SansSerif", Font.BOLD, 58);
    namefont = new Font("SansSerif", Font.BOLD, 18);
    footfont = new Font("SansSerif", Font.BOLD, 12);
    hutImg = getToolkit().getImage("./images/intro.jpg");
// draw the specify String s with specify font, color and position
  private void d(Graphics g, String s, Color c, Font f, int y, int off) {
    g.setFont(f);
    FontMetrics fm = g.getFontMetrics();
    g.setColor(c);
    g.drawString(s, (w - fm.stringWidth(s)) / 2 + off, y + off);
//Overide the paint method from the parent
  public void paintComponent(Graphics g) {
//get the size of the window.
    Dimension d = getSize();
    w = d.width;
    h = d.height;
  //set the back ground color to CYAN
    g.setColor(Color.CYAN);
    g.fillRect(0, 0, w, h);
// draw a blue 3D rectangle to put introduction
    g.setColor(blue);
    g.fill3DRect(edge, edge, w - 2 * edge, h - 2 * edge, true);
//draw information and logo on to the rectangle
    g.clearRect(w/2 - 100/2, edge, 100, 140);
    g.drawImage(hutImg, w/2 - 100/2, edge, 100, 140, this);
    d(g, title, Color.black, titlefont, h / 2, 1);
    d(g, title, Color.white, titlefont, h / 2, -1);
    d(g, title, Color.pink, titlefont, h /2 , 0);
    d(g, name, Color.black, namefont, h * 3 / 4, 0);
    d(g, foot, Color.black, footfont, h * 9/11, 0);
    d(g, subFoot, Color.black, footfont, h * 7/8, 0);
//??????????????????????????????????????????????????????????????????????????????Sorry! in the last post I don't know that our forum suport the  tag.
Thanks for informing me!
Thanks!