先貼程式碼，再看註釋；

//顯示圖片的JLabel
          ImageIcon background =new ImageIcon(test.class.getResource("jpanel_pci.jpg"));//test為當前的類，jpanel_pci.jpg自動新增到當前專案的包中
          background.setImage(
        		  background.getImage().
        		  getScaledInstance(background.getIconWidth(),background.getIconHeight(), Image.SCALE_DEFAULT));  
          /****
           * @author Administrator
           * getScaledInstance(width,height,hints);//width,height,hints為方法中的引數
           * width the width to which to scale the image.
           * height the height to which to scale the image.
           * hints flags to indicate the type of algorithm to use for image resampling.//指示用於影象重新取樣的演算法型別的標誌，指定縮放的比例演算法
           */
          JLabel picJLabel=new JLabel();
          System.out.println(background.getIconHeight() + " " + background.getIconWidth());  
          picJLabel.setBounds(640, 80, 350, 222);
          picJLabel.setIcon(background);
          picJLabel.setHorizontalAlignment(0);  
 

<pre name="code" class="java">          //最後在JFrame中新增JLabel
          this.add(picJLabel);

大概就這麼一些，還有JFrame的新增圖片的，也是不是很熟悉，稍後寫。