在 JFrame 中将图像绘制到 JPanel

2022-01-24 00:00:00 image java swing jpanel jframe

我正在设计一个在 JFrame 中包含两个 JPanel 的程序，一个用于保存图像，另一个用于保存 GUI 组件(搜索字段等).我想知道如何将图像绘制到 JFrame 中的第一个 JPanel?

I am designing a program that contains two JPanels within a JFrame, one is for holding an image, the other for holding GUI components(Searchfields etc). I am wondering how do I draw the Image to the first JPanel within the JFrame?

这是我的构造函数的示例代码:

Here is a sample code from my constructor : 

public UITester() {
    this.setTitle("Airplane");
    Container container = getContentPane();
    container.setLayout(new FlowLayout());
    searchText = new JLabel("Enter Search Text Here");
    container.add(searchText);
    imagepanel = new JPanel(new FlowLayout());
    imagepanel.paintComponents(null);
   //other constructor code

}

public void paintComponent(Graphics g){
    super.paintComponents(g);
    g.drawImage(img[0], -50, 100, null);
}

我试图重写 JPanel 的 paintComponent 方法来绘制图像，但是当我尝试编写时，这会导致我的构造函数出现问题:

I was trying to override the paintComponent method of JPanel to paint the image, but this causes a problem in my constructor when I try to write : 

imagepanel.paintComponents(null);

因为它只允许我传递 null 方法，而不是 Graphics g，所以有人知道此方法的修复方法或我可以用来在 JPanel 中绘制图像的其他方法吗?帮助表示赞赏！:)

As it will only allow me to pass the method null, and not Graphics g, anybody know of a fix to this method or another method i can use to draw the image in the JPanel? Help is appreciated! :)

一切顺利，并在此先感谢！马特

All the best and thanks in advance! Matt

推荐答案

我想建议一个更简单的方法，

I'd like to suggest a more simple way, 

  image = ImageIO.read(new File(path));
  JLabel picLabel = new JLabel(new ImageIcon(image));

耶耶！现在您的图像是一个摆动组件！将它添加到框架或面板或您通常做的任何东西！可能也需要重新粉刷，比如

Yayy! Now your image is a swing component ! add it to a frame or panel or anything like you usually do! Probably need a repainting too , like

  jpanel.add(picLabel);
  jpanel.repaint();

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