java - Java 中的图标 - 如何在面板中添加图标

Question

请引用此链接查看图片: https://www.dropbox.com/s/byeah81vg1cck5m/output.jpg我想要一个像上图这样的面板。你好，我是 Java 的初学者，我想知道如何在带有滚动条的面板中添加这个图标。我试过使用 JLabel，这是我的代码:

      JPanel panel = new JPanel();
    panel.setLayout(null);
    JScrollPane txtstmtPane = new JScrollPane(panel,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    ImageIcon icon=new ImageIcon ( "icon/filter.jpg" );
    JLabel label = new JLabel();
    label.setIcon(icon);
    label.setBounds(600, 600, 40, 30);
    panel.add(label);
    txtstmtPane.setViewportView(panel);
    add(txtstmtPane);

Answer 1

看这个:

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.*;

public class ImagePanel extends JPanel{
    private BufferedImage bi;

    public ImagePanel() {  

      try {
            bi = ImageIO.read(new File("Your Image Path"));
        } catch (IOException ex) {
            Logger.getLogger(ImagePanel.class.getName()).log(Level.SEVERE, null, ex);
        }


        final JPanel panel = new JPanel(){
            @Override
            protected void paintComponent(Graphics g){
                Graphics g2 = g.create();
                g2.drawImage(bi, 0, 0, getWidth(), getHeight(), null);
                g2.dispose();
            }

            @Override
            public Dimension getPreferredSize(){
                return new Dimension(bi.getWidth()/2, bi.getHeight()/2);
                //return new Dimension(200, 200);
            }
        };

        add(panel);
    }  

        public static void main(String args[]){
            SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                ImagePanel imgPanel=new ImagePanel();
                JOptionPane.showMessageDialog(
                        null, imgPanel, "Image Panel", JOptionPane.PLAIN_MESSAGE);
            }
        });
        }
}

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输出

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提示

1. 不要使用 NULL 布局(正如@camickr 所建议的)
2. 使用正确的 Layout Manager
3. 使用此代码我不认为你需要 ScrollPane