Rendering Image into label

问题

I have a label. I want to render image into it. But the following code would do anything.

 CardLayout cl = (CardLayout) (mainPanel.getLayout());
        cl.show(mainPanel, "newPersonaCard");
        BufferedImage myPicture = ImageIO.read(new    File("C:\\Desktop\\Documents\\Pictures\\always.jpg"));
        ImageIcon icon = new ImageIcon(myPicture);
        icon.getImage().flush();

I am using netbean designer.

回答1:

You are right, in some cases there issue with repainting Icon in the JLabel, then you have to call,

myIcon.getImage().flush();
myLabel.setIcon(myIcon);

rest of methods is implemented in the Icon and JLabel correctly

回答2:

.
.
File file = fileChooser.getSelectedFile();

JLabel label = new JLabel();
ImageIcon icon = new ImageIcon(file.getAbsolutePath());
label.setIcon(icon);
//add label to panel

回答3:

fileChooser.showDialog(saveBtn2, null);
File file = fileChooser.getSelectedFile();
System.out.println("The path to file "+file.getAbsolutePath());          
ImageIcon icon = new ImageIcon(file.getAbsolutePath());
pictureLbl.setIcon(icon);

来源：https://stackoverflow.com/questions/10318502/rendering-image-into-label