如何使用 GridBagLayout() 将图像放入 jpanel？

Question

目前代码为：

JFrame frame = new JFrame("App");
frame.setSize(1200, 800);//Give it a size
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);//Make it go away on close
JPanel panel = new JPanel(new FlowLayout(FlowLayout.LEFT)); //TU ZMIENIAC
frame.add(panel);//Add it to your frame

(...)
JPanel panelForm = new JPanel(new GridBagLayout());
panel.add(panelForm);

GridBagConstraints c = new GridBagConstraints();
c.insets = new Insets(10,10,10,10);
c.gridx = 0;
c.gridy = 0;
c.anchor = GridBagConstraints.LINE_END;
(...)
panelForm.add(label_pageCount, c);
c.gridy++;
try {
    URL url = new URL(JSONLists.thumbnail.get(page));
    BufferedImage image = ImageIO.read(url);
    JLabel label = new JLabel(new ImageIcon(image));
    panelForm.add(label);
} catch (Exception exp) {
    exp.printStackTrace();
}

这导致：

每个 Jlabel 都正确放置在网格上的位置，除了出现在右上角而不是指定位置的图像。

Answer 1

本部分：

try {
    URL url = new URL(JSONLists.thumbnail.get(page));
    BufferedImage image = ImageIO.read(url);
    JLabel label = new JLabel(new ImageIcon(image));
    panelForm.add(label); //here
} catch (Exception exp) {
    exp.printStackTrace();
}

您将组件添加到没有 GridBagConstratints 的容器中。这就是组件未添加到正确位置的原因。因此，将其更改为：

panelForm.add(label,c); //Add with constraints

会修复它。

如何使用 GridBagLayout() 将图像放入 jpanel？

How to put an image into jpanel with GridBagLayout()?

java

swing

jframe

layout-manager

gridbaglayout