我一直在浏览代码，但我的形象是唯一没有出现在我的最终项目中的东西。我似乎无法找出问题所在。我已将图像路径放在我的闪存驱动器和桌面上但它似乎不起作用。请看看你能做些什么。谢谢！以下是完整的代码。
import javax.swing.*;
import java.awt.*;
import javax.swing.JTabbedPane;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JComponent;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
import java.awt.Color;
import java.net.MalformedURLException;
import java.io.File;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.UnsupportedLookAndFeelException;
public class LatinLife extends JPanel{
public LatinLife() {
super(new GridLayout(1, 1));
Test Bub = new Test();
//maybe make the file a picture instead of a text file
JTabbedPane tabbedPane = new JTabbedPane();
ImageIcon icon = createImageIcon("/Volumes/APCOMSCI/hh.jpg");
JComponent panel1 = makeImagePanel("Latin Life Saver");
tabbedPane.addTab("Home", icon, panel1,
"Does nothing");
tabbedPane.setMnemonicAt(0, KeyEvent.VK_1);
panel1.setBackground(Color.white);
JComponent panel2 = makeImagePanel("/Users/ashleyvpalermo/Desktop/Screen Shot 2018-05-31 at 3.33.25 PM.png");
ImageIcon acon = createImageIcon("/Volumes/APCOMSCI/Smiling_Face_Emoji_large.png");
tabbedPane.addTab("Cum Clauses", acon, panel2,
"Does nothing");
JLabel nice = new JLabel("Cum Clauses");
nice.setIcon(acon);
tabbedPane.setMnemonicAt(0, KeyEvent.VK_2);
panel2.setBackground(Color.yellow);
JComponent panel3 = makeImagePanel("Ut clauses");
ImageIcon bcon = createImageIcon("/Volumes/APCOMSCI/images-1.jpeg");
tabbedPane.addTab("Ut Clauses", bcon, panel3,
"Ut Clauses");
tabbedPane.setMnemonicAt(1, KeyEvent.VK_3);
panel3.setBackground(Color.pink);
JComponent panel4 = makeImagePanel("Vocab");
ImageIcon ccon = createImageIcon("/Volumes/APCOMSCI/images.jpeg");
tabbedPane.addTab("Vocab", ccon, panel4,
"Still does nothing");
tabbedPane.setMnemonicAt(2, KeyEvent.VK_4);
panel4.setBackground(Color.white);
JComponent panel5 = makeImagePanel("Ablatives");
ImageIcon jcon = createImageIcon("/Volumes/APCOMSCI/Unknown-1.jpeg");
panel5.setPreferredSize(new Dimension(410, 50));
tabbedPane.addTab("Ablatives", jcon, panel5,
"Does nothing at all");
tabbedPane.setMnemonicAt(3, KeyEvent.VK_5);
panel5.setBackground(Color.yellow);
JComponent panel6 = makeImagePanel("Culture");
ImageIcon kcon = createImageIcon("/Volumes/APCOMSCI/Unknown.jpeg");
tabbedPane.addTab("Culture", kcon, panel6,
"Still does nothing");
tabbedPane.setMnemonicAt(2, KeyEvent.VK_6);
panel6.setBackground(Color.pink);
//Add the tabbed pane to this panel.
add(tabbedPane);
//The following line enables to use scrolling tabs.
tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
JPanel panel = new JPanel();
}
protected JComponent makeImagePanel(String path) {
JPanel panel = new JPanel(false);
JLabel filler = new JLabel(path);
filler.setHorizontalAlignment(JLabel.CENTER);
panel.setLayout(new GridLayout(1, 1));
panel.add(filler);
return panel;
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
// java.net.URL imgURL = NewJApplet.class.getResource(path);
try {
java.net.URL imgURL = (new File(path)).toURL();
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
}
} catch (MalformedURLException ex) {
System.out.println(ex);
}
return null;
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from
* the event dispatch thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("Latin Life Saver");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add content to the window.
frame.add(new LatinLife(), BorderLayout.CENTER);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event dispatch thread:
//creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE);
createAndShowGUI();
}
});
}
public class Test {
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private BufferedImage img = null;
public TestPane() {
try {
img = ImageIO.read(new FileInputStream("/Users/ashleyvpalermo/Desktop/Screen Shot 2018-05-31 at 3.33.25 PM.png"));
} catch (IOException ex) {
ex.printStackTrace();
}
}
@Override
public Dimension getPreferredSize() {
return img == null ? new Dimension(200, 200) : new Dimension(img.getWidth(), img.getHeight());
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
if (img != null) {
g2d.drawImage(img, 0, 0, this);
}
g2d.dispose();
}
}
}
}
我对这部分有困难，因为我最初将它作为文本工作，但现在我想在框架内放置一张图片。我该怎么做？
JComponent panel2 = makeImagePanel("/Users/ashleyvpalermo/Desktop/Screen Shot 2018-05-31 at 3.33.25 PM.png");
答案 0 :(得分：0)
我写了一个简短的测试应用程序试试这个，然后加入：
ImageIcon icon = new ImageIcon("C:/Volumes/APCOMSCI/second_ed_sourcecode-2/APCS Final Project Latin Life Saver/Cum_Clauses_Pic.jpg");
（使用本地文件也是jpg）
它有效。
我认为地址中的空格可能是一个问题，但我的确很好。
（我在桌面上访问了一个jpg，所以我将它放在一个名为'New folder'的新文件夹中，尽管有空间，但它仍能正常工作）
从资源URL加载它通常是如果你想要它或它的东西，然后图像的地址将是相对的（例如，你希望它通常也包装在jar中）< / p>
如果您想使用网址，可以试试这个：
java.net.URL imgURL = (new File(path)).toURL();
（你也需要捕捉MalformedURLException）
protected static ImageIcon createImageIcon(String path) {
// java.net.URL imgURL = NewJApplet.class.getResource(path);
try {
java.net.URL imgURL = (new File(path)).toURL();
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
}
} catch (MalformedURLException ex) {
System.out.println(ex);
}
return null;
}
但是您的IDE应该抱怨它已被弃用 - javadoc建议先将其转换为URI
E.g。
java.net.URL imgURL = (new File(path)).toURI().toURL();
那么为什么要通过文件？原因是（如果将其作为自己的变量分开），可以调用有用的方法，例如.exists（）;
e.g。
File f = new File(path);
if (f.exists()) {
java.net.URL imgURL = f.toURI().toURL();
（等）