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나는 다음과 같은 코드가 있습니다JPanel의
class ImagePanel extends JPanel {
private Image img;
public ImagePanel(String img) {
this(new ImageIcon(img).getImage());
}
public ImagePanel(Image img) {
this.img = img;
Dimension size = new Dimension(img.getWidth(null), img.getHeight(null));
setPreferredSize(size);
setMinimumSize(size);
setMaximumSize(size);
setSize(size);
setLayout(null);
}
public void paintComponent(Graphics g) {
g.drawImage(img, 0, 0, null);
}
}
다음과 같은 : 나는이 코드를 실행하면
public GUIVenDetails() throws MalformedURLException, IOException{
mapPanel = new ImagePanel("http://www.netstate.com/states/symb/gamebirds/images/wild_turkey.jpg");
mapPanel.setPreferredSize(new Dimension(200,200));
mapPanel.setMinimumSize(mapPanel.getPreferredSize());
mapPanel.setMaximumSize(mapPanel.getPreferredSize());
add(mapPanel);
}
public static void main(String[] args) throws MalformedURLException, IOException, XPathExpressionException, SAXException, ParserConfigurationException {
GUIVenDetails gui = new GUIVenDetails();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension windowSize = gui.getSize();
int windowX = Math.max(0, (screenSize.width - windowSize.width)/2);
int windowY = Math.max(0, (screenSize.height - windowSize.height)/2);
JFrame f=new JFrame();
f.setSize(new Dimension(400,800));
f.setLocation(windowX, windowY);
f.add(gui);
f.setVisible(true);
}
, 나는 ... 왜 흰색을 제외한 아무것도 표시되지 않습니다를 이거 야?