【发布时间】：2019-06-06 11:15:03
【问题描述】：
我正在尝试将 gif 转换为缓冲图像的 Arraylist。我之前使用过Convert each animated GIF frame to a separate BufferedImage 的一段代码，但它返回的缓冲图像中每个像素都是相同的颜色。因此，我决定改用这个：
public ArrayList<BufferedImage> getFrames(File gif) throws IOException {
ArrayList<BufferedImage> frames = new ArrayList<BufferedImage>();
try {
ImageReader reader = ImageIO.getImageReadersByFormatName("gif").next();
ImageInputStream stream = ImageIO.createImageInputStream(gif);
reader.setInput(stream);
int count = reader.getNumImages(true);
System.out.println("count is "+count);
for (int index = 0; index < count; index++) {
System.out.println("index is "+index);
BufferedImage frame = reader.read(index);
frames.add(frame);
}
} catch (IOException ex) {
System.out.println("An I/O problem has occurred");
}
return frames;
}
输出表明第10张图片有错误：
count is 70
index is 0
index is 1
index is 2
index is 3
index is 4
index is 5
index is 6
index is 7
index is 8
index is 9
index is 10
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 4096
我想知道：为什么是 10？导致此问题的第 11 个图像会发生什么？如何修复错误以便我可以拥有全部 70 帧？
这是其余的错误（添加了堆栈跟踪）：
at com.sun.imageio.plugins.gif.GIFImageReader.read(Unknown Source)
at javax.imageio.ImageReader.read(Unknown Source)
at Pointilismo.getFrames(Pointilismo.java:104)
at Pointilismo.updateimage(Pointilismo.java:116)
at Pointilismo.switchimage(Pointilismo.java:135)
at Pointilismo.actionPerformed(Pointilismo.java:210)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
【问题讨论】：
-
您是否有堆栈跟踪，以便获得有关异常确切位置的更多信息？
-
@Conffusion 我已添加并更新以显示错误消息的其余部分。