这是书上有一个例子。我把源码复制(不做任何修改)在cmd运行无问题。 但是放eclipse里就不行,主要是图片路径错误刚学java,求大神指导怎么解决附上例子源代码import java.awt.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;/**
* @version 1.33 2007-04-14
* @author Cay Horstmann
*/
public class ImageTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
ImageFrame frame = new ImageFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}/**
* A frame with an image component
*/
class ImageFrame extends JFrame
{
public ImageFrame()
{
setTitle("ImageTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); // add component to frame ImageComponent component = new ImageComponent();
add(component);
} public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
}/**
* A component that displays a tiled image
*/
class ImageComponent extends JComponent
{
public ImageComponent()
{
// acquire the image
try
{
image = ImageIO.read(new File("blue-ball.gif"));
}
catch (IOException e)
{
e.printStackTrace();
}
} public void paintComponent(Graphics g)
{
if (image == null) return; int imageWidth = image.getWidth(this);
int imageHeight = image.getHeight(this); // draw the image in the upper-left corner g.drawImage(image, 0, 0, null);
// tile the image across the component for (int i = 0; i * imageWidth <= getWidth(); i++)
for (int j = 0; j * imageHeight <= getHeight(); j++)
if (i + j > 0) g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j
* imageHeight);
} private Image image;
}
import java.io.*;
import javax.imageio.*;
import javax.swing.*;/**
* @version 1.33 2007-04-14
* @author Cay Horstmann
*/
public class ImageTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
ImageFrame frame = new ImageFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}/**
* A frame with an image component
*/
class ImageFrame extends JFrame
{
public ImageFrame()
{
setTitle("ImageTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); // add component to frame ImageComponent component = new ImageComponent();
add(component);
} public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
}/**
* A component that displays a tiled image
*/
class ImageComponent extends JComponent
{
public ImageComponent()
{
// acquire the image
try
{
image = ImageIO.read(new File("blue-ball.gif"));
}
catch (IOException e)
{
e.printStackTrace();
}
} public void paintComponent(Graphics g)
{
if (image == null) return; int imageWidth = image.getWidth(this);
int imageHeight = image.getHeight(this); // draw the image in the upper-left corner g.drawImage(image, 0, 0, null);
// tile the image across the component for (int i = 0; i * imageWidth <= getWidth(); i++)
for (int j = 0; j * imageHeight <= getHeight(); j++)
if (i + j > 0) g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j
* imageHeight);
} private Image image;
}
建议新建一个用于放置图片的package
之后通过Toolkit.getDefaultToolkit().getImage(
ImageComponent .class.getResource("/images/UTank_.gif"));
这种方式来获得一个Image对象。
之后将项目打成jar之后,使用自己构造的ImageComponent
的时候就不必考虑图片的问题了