好的,所以我从数据库中获取单个图像没有问题 . 我使用它在 JLabel
上将其作为 ImageIcon
返回;
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 JLabel
分配给 CardLayout
中的新 JPanel
. 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 JPanel();
img2.add(image2);
loadcard.add(img2, "2");
BufferedImage imgC = ImageIO.read(new File("lmkpackage/images/three.jpg"));
image3 = new JLabel(new ImageIcon(imgC));
image3.setPreferredSize(new Dimension(200, 200));
img3 = new JPanel();
img3.add(image3);
loadcard.add(img3, "3");
BufferedImage imgD = ImageIO.read(new File("lmkpackage/images/four.jpg"));
image4 = new JLabel(new ImageIcon(imgD));
image4.setPreferredSize(new Dimension(200, 200));
img4 = new JPanel();
img4.add(image4);
loadcard.add(img4, "4");
BufferedImage imgE = ImageIO.read(new File("lmkpackage/images/five.jpg"));
image5 = new JLabel(new ImageIcon(imgE));
image5.setPreferredSize(new Dimension(200, 200));
img5 = new JPanel();
img5.add(image5);
loadcard.add(img5, "5");
根据要求,这是我的尝试:
while (rs.next()) {
images = rs.getString("path");
System.out.println(images + "\n");
System.out.println("TESTING - READING IMAGE");
for(i=0; i < 5; i++){
BufferedImage img[i] = ImageIO.read(new File(images));
imglab[i] = new JLabel(new ImageIcon(imgIcon[i]));
imgPanel[i]= new JPanel();
imgPanel[i].add(imglab[i]);
loadcard.add(imgPanel[i], i);
}//End For
}//EndWhile
我得到的错误是:
letmeknow.java:181:']'期望BufferedImage img [i] = ImageIO.read(new File(images)); letmeknow.java:181:非法启动表达式BufferedImage img [i] = ImageIO.read(new File(images));
1 回答
这条线毫无意义:
因为你似乎试图同时声明和使用一个数组,这表明你应该查看关于数组使用的基本Java教程,因为这个知识库很关键,在尝试数据库编程之前应该是众所周知的 . Swing GUI编程 .
为了解决这个问题,在while循环之前声明你的数组(或者可能更好的 - ArrayList)BufferedImage,然后在循环中使用它 . 例如:
虽然如果你所做的只是将JPanels添加到CardLayout中,甚至可能都不需要所有这些数组 . 我将图像文件路径存储在数据库而不是图像本身中似乎有点奇怪 . 您的图像文件名称似乎微不足道,甚至可能甚至不需要数据库 . 也许你需要的只是这样一个非常简单的东西: