通常讓這些控件加載圖片的代碼如下:
JButton addTebBtn = new JButton(new ImageIcon(TabbedPanel.class
.getResource("/addTab.gif")));
如果要顯示動態(tài)Gif圖片這樣做法就不靈了.如果要顯示動態(tài)Gif圖片的話,我們需要從JLabel,JButton等控件繼承一個類,并重載其public void paint(Graphics g)方法,然后用一個線程不斷去刷新它(用Timer也可以,請參考文章" 封裝完畢,能顯示當(dāng)前時(shí)間并改變風(fēng)格的菜單類 ( http://www.tkk7.com/sitinspring/archive/2007/06/08/122753.html )"中Timer 的做法,它有少實(shí)現(xiàn)一個Runnable接口的優(yōu)勢),這樣gif的動態(tài)效果就顯示出來了.
標(biāo)簽的完整代碼如下,其它控件大家可自行參照實(shí)現(xiàn):
package com.junglesong.common.component.label;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import javax.swing.JLabel;
public class DynGifLabel extends JLabel implements Runnable 
{
private static final long serialVersionUID = 45345345355L;
// 用以存儲Gif動態(tài)圖片
public Image image;
// 用以刷新paint函數(shù)
Thread refreshThread;
/** *//**
*
* @param image:
* Sample:new ImageIcon(DynGifLabel.class
* .getResource("/picture.gif")).getImage()
*/
public DynGifLabel(Image image) {
this.image = image;
refreshThread = new Thread(this);
refreshThread.start();
}
/** *//**
* 重載paint函數(shù)
*/
public void paint(Graphics g) {
super.paint(g);
Graphics2D graph = (Graphics2D) g;
if (image != null) {
// 全屏描繪圖片
graph.drawImage(image, 0, 0, getWidth(), getHeight(), 0, 0, image
.getWidth(null), image.getHeight(null), null);
}
}
/** *//**
* 隔100毫秒刷新一次
*/
public void run() {
while (true) {
this.repaint();// 這里調(diào)用了Paint
try {
Thread.sleep(100);// 休眠100毫秒
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
使用過程如下:
DynGifLabel stateLbl = new DynGifLabel(new ImageIcon(ThreadPanel.class
.getResource("/startThread.gif")).getImage());
以上.