Question

java作业日历记事本 让在界面显示一张图片 这是我创建的图片类 可是运行之后没有图片显示

import javax.swing.*;
import java.io.*;
import java.awt.*;

public class CalendarImage extends JPanel
{
File imageFile;
Image image;
Toolkit tool;
CalendarImage()
{
tool = getToolkit();
}

public void setImageFile(File f)
{
imageFile = f;
try
{
image = tool.getImage(imageFile.toURI().toURL());
}
catch (Exception e){}
repaint();
}

public void paintComponent(Graphics g)
{
super.paintComponent(g);
int w = getBounds().width;
int h = getBounds().height;
g.drawImage(image,0,0,w,h,this);
}
}
最好能举例说明一下

Answer 1

public void paintComponent(Graphics g)没有调用public void setImageFile(File f)方法!
public void setImageFile(Graphics g)里面加一个画图的方法,把paintComponent的g.drawImage(image,0,0,w,h,this);放到方法setImageFile里面,然后
int w = getBounds().width;
int h = getBounds().height;
public void paintComponent(Graphics g)
{
super.paintComponent(g);
setImageFile(g);
}

Answer 2

main方法呢，没有主进程你怎么执行程序

Answer 3

啊

Answer 4

我也在搞着