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我試圖在JPanel中顯示圖像。我正在使用swingx庫 - ImagePainter。所以我創建了一個背景畫家設置爲ImagePainter的JXPanel。在JPanel swing中顯示圖像時出現內存不足
現在,我需要在2個獨立的JFrame中的JPanel上顯示相同的圖像。當我這樣做時,我會遇到一個堆空間問題。在這種情況下,我是否共享ImagePainter的同一個實例?這會有幫助嗎?但這意味着如果我需要顯示多個獨特的圖像,我會得到一個內存不足的錯誤。無論如何,我做錯了什麼?
我使用的代碼如下:
public static ImagePainter getImagePainter(String imageLocation) {
ImagePainter imgPainter=null;
try {
imgPainter = new ImagePainter(ImageIO.read(new File(imageLocation)));
} catch (IOException e) {
throw new SwingObjectRunException(e, ErrorSeverity.SEVERE, CommonUI.class);
}
return imgPainter;
}
錯誤堆棧跟蹤如下:
Caused by: java.lang.OutOfMemoryError: Java heap space
at java.awt.image.DataBufferByte.<init>(DataBufferByte.java:59)
at java.awt.image.ComponentSampleModel.createDataBuffer(ComponentSampleModel.java:397)
at java.awt.image.Raster.createWritableRaster(Raster.java:938)
at javax.imageio.ImageTypeSpecifier.createBufferedImage(ImageTypeSpecifier.java:1056)
at javax.imageio.ImageReader.getDestination(ImageReader.java:2879)
at com.sun.imageio.plugins.jpeg.JPEGImageReader.readInternal(JPEGImageReader.java:980)
at com.sun.imageio.plugins.jpeg.JPEGImageReader.read(JPEGImageReader.java:948)
at javax.imageio.ImageIO.read(ImageIO.java:1422)
at javax.imageio.ImageIO.read(ImageIO.java:1282)
更新:這是顯示問題的SSCCE: 您需要的JGoodies在你的類路徑中構造佈局jar和swingx jar來編譯。再次點擊圖片兩次,對我來說,我收到了一個內存不足的錯誤。我使用的圖像也被附加。
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import org.jdesktop.swingx.JXPanel;
import org.jdesktop.swingx.painter.ImagePainter;
import com.jgoodies.forms.layout.CellConstraints;
import com.jgoodies.forms.layout.FormLayout;
public class Photo {
/**
* @param args
*/
public static void main(String[] args) {
try{
JFrame frame=new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel=new JPanel();
panel.setLayout(new FormLayout("5dlu,fill:250px,15dlu", "5dlu,fill:150px,15dlu,fill:pref,5dlu"));
panel.add(getImagePanel(), new CellConstraints(2, 2));
JButton btnOpenDiag=new JButton("Open Image Again");
panel.add(btnOpenDiag,new CellConstraints(2, 4, 1, 1, CellConstraints.CENTER, CellConstraints.FILL));
btnOpenDiag.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
JDialog dialog=new JDialog();
JPanel panel=new JPanel();
panel.setLayout(new FormLayout("5dlu,fill:250px,15dlu", "5dlu,fill:150px,5dlu"));
panel.add(Photo.getImagePanel(), new CellConstraints(2, 2));
dialog.setContentPane(panel);
dialog.pack();
dialog.setVisible(true);
} catch (IOException e1) {
e1.printStackTrace();
}
}
});
frame.setContentPane(panel);
frame.pack();
frame.setVisible(true);
}catch(Exception e){
}
}
protected static JXPanel getImagePanel() throws IOException {
JXPanel imgPanel=new JXPanel();
ImagePainter painter=new ImagePainter(ImageIO.read(new File(Photo.class.getResource("image.jpg").getFile())));
painter.setFillHorizontal(true);
painter.setFillVertical(true);
imgPanel.setBackgroundPainter(painter);
return imgPanel;
}
}
像素和位深度的圖像有多大? *「2個獨立的JFrames」*應用程序通常應該只有[一幀](http://stackoverflow.com/a/9554657/418556)。 – 2012-03-20 11:17:17
imageLocation中的文件有多大?如果你指向一個較小的文件會發生什麼? – 2012-03-20 11:25:47
你確定你不是以某種方式在循環中調用getImagePainter()嗎? – 2012-03-20 11:29:41