Image圖片資源獲取及釋放工具類，eclipse開發(fā)避免不了使用大量的圖片資源，CacheImage可以幫我們完成這項(xiàng)工作，使用起來相當(dāng)方便。

import ?java.util.HashMap;
 import ?java.util.Iterator;
 import ?java.util.Map;
 import ?org.eclipse.swt.graphics.Image;
 import ?org.eclipse.ui.plugin.AbstractUIPlugin;

 public ? class ?CacheImage? {
? private ? final ?Map < String,?Image > ?imageMap? = ? new ?HashMap < String,?Image > ();

? private ? static ?CacheImage?INSTANCE;

? private ?CacheImage()? {
?}

? // ?單例模式，獲得CacheImage實(shí)例
? public ? static ?CacheImage?getINSTANCE()? {
?? if ?(INSTANCE? == ? null )
???INSTANCE? = ? new ?CacheImage();
?? return ?INSTANCE;
?}

? // ?獲得圖像
? public ?Image?getImage(String?applicationID,String?imageName)? {
?? if ?(imageName? == ? null )
??? return ? null ;
??Image?image? = ?(Image)?imageMap.get(imageName);
?? if ?(image? == ? null )? {
???image? = AbstractUIPlugin.imageDescriptorFromPlugin(
?????applicationID,imageName).createImage();
???imageMap.put(imageName,?image);
??}
?? return ?image;
?}

? // ?釋放圖像資源
? public ? void ?dispose()? {
??Iterator?iterator? = ?imageMap.values().iterator();
?? while ?(iterator.hasNext())
???((Image)?iterator.next()).dispose();
??imageMap.clear();
?}
}



窗口居中工具類

import ?org.eclipse.swt.graphics.Rectangle;
 import ?org.eclipse.swt.widgets.Display;
 import ?org.eclipse.swt.widgets.Shell;

 public ? class ?CenterUtil? {
???? public ? static ? void ?centerShell(Display?display,Shell?shell) {
?????????Rectangle?displayBounds? = ?display.getPrimaryMonitor().getBounds();
?????????Rectangle?shellBounds? = ?shell.getBounds();
????????? int ?x? = ?displayBounds.x? + ?(displayBounds.width? - ?shellBounds.width) >> 1 ;
????????? int ?y? = ?displayBounds.y? + ?(displayBounds.height? - ?shellBounds.height) >> 1 ;
?????????shell.setLocation(x,?y);
?????}
?}