小编Ped*_*ler的帖子

我正在开发一个显示图像的应用程序,并从数据库中播放声音.我正在尝试决定是否使用单独的JFrame从GUI向数据库添加图像.

我只是想知道使用多个JFrame窗口是否是一个好习惯？

Naive Bayes的天真是什么？

好的,所以我从数据库中获取单个图像没有问题.我用它来把它作为ImageIcon一个JLabel;

while (rs.next()) {
images = rs.getString("path");
System.out.println(images + "\n");
System.out.println("TESTING - READING IMAGE");
BufferedImage img = ImageIO.read(new File(images));
System.out.println("img = " + images);
imagelabel = new JLabel(new ImageIcon(img));
imagelabel.setPreferredSize(new Dimension(200, 200));
imageselect.add(imagelabel);

但是,我需要对多个图像执行此操作,并将每个图像分配JLabel给一个新JPanel的图像CardLayout.我知道我需要某种循环,寻找最佳方法的建议!

BufferedImage imgA = ImageIO.read(new File("lmkpackage/images/one.jpg"));
            image1 = new JLabel(new ImageIcon(imgA));
            image1.setPreferredSize(new Dimension(200, 200));
            img1 = new JPanel();        
            img1.add(image1);

            loadcard.add(img1,"1");
            cl2.show(loadcard,"1");

            BufferedImage imgB = ImageIO.read(new File("lmkpackage/images/two.jpg"));
            image2 = new JLabel(new ImageIcon(imgB));
            image2.setPreferredSize(new Dimension(200, 200));
            img2 = new …

我已经在两个JPanel之间实现了这个非常基本的拖放操作,但这并不能满足我的要求!

public class test extends JFrame {

{    JPanel mainpanel, storypanel, imageselect;



    public test(){

          mainpanel = new JPanel(new BorderLayout());
          storypanel = new JPanel();
          imageselect = new JPanel();
            MouseListener listener = new MouseAdapter(){
            public void mousePressed(MouseEvent e)
        {
            JComponent c = (JComponent) e.getSource();
            TransferHandler handler = c.getTransferHandler();
            handler.exportAsDrag(c, e, TransferHandler.COPY);
        }
        };

            int j = 0;
            BufferedImage myImages;
            JLabel imgselect = new JLabel();
            try { myImages = ImageIO.read(new File("four.jpg"));
            //myImages[j] = resize(myImages[j]);
            imgselect= new JLabel(new ImageIcon(myImages));
            System.out.println(j);
            imageselect.add(imgselect);
            imgselect.addMouseListener(listener);
            imgselect.setTransferHandler(new TransferHandler("icon")); …

我正在尝试将图像大小调整为50*50像素.我从他们存储在数据库中的路径中获取图像.我没有问题获取图像并显示它们.我只是想知道我应该在什么时候尝试调整图像大小.应该是将图像作为缓冲图像,还是只是尝试调整图标大小？

while (rs.next()) {
                        i = 1;
                        imagePath = rs.getString("path");
                            System.out.println(imagePath + "\n");
                            System.out.println("TESTING - READING IMAGE");
                        System.out.println(i);

                        myImages[i] = ImageIO.read(new File(imagePath));
                        **resize(myImages[i]);**

                        imglab[i] = new JLabel(new ImageIcon(myImages[i]));
                        System.out.println(i);
                        imgPanel[i]= new JPanel();
                        imgPanel[i].add(imglab[i]);
                        loadcard.add(imgPanel[i], ""+i);     
                        i++; 

上面的代码检索图像并将其分配给ImageIcon,然后分配给JLabel.我试图通过使用下面的调整大小方法来调整缓冲图像的大小.你们能不清楚为什么这对我不起作用？没有任何错误,只是图像保持原始大小.

public static BufferedImage resize(BufferedImage img) {  
          int w = img.getWidth();  
          int h = img.getHeight(); 
          int newH = 50;
          int newW = 50;
          BufferedImage dimg = dimg = new BufferedImage(newW, newH, img.getType());  
          Graphics2D g = dimg.createGraphics();  
          System.out.println("Is this getting here at all " + …