我的程序编译时提示找不到class,什么地方有啊？

[xiaofeng_cxy]

源代码开始处如下：
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import java.swing.*;

编译提示如下：
E:\Java\ImageViewer\ImageViewer.java:5: package java.swing does not exist
import java.swing.*;
^
E:\Java\ImageViewer\ImageViewer.java:19: cannot resolve symbol
symbol : class JFrame
location: class ImageViewerFrame
class ImageViewerFrame extends JFrame
^
E:\Java\ImageViewer\ImageViewer.java:81: cannot resolve symbol
symbol : class JLabel
location: class ImageViewerFrame
private JLabel label;
^
E:\Java\ImageViewer\ImageViewer.java:11: cannot resolve symbol
symbol : class JFrame
location: class ImageViewer
JFrame frame=new ImageViewerFrame();
^
E:\Java\ImageViewer\ImageViewer.java:14: cannot resolve symbol
symbol : variable JFrame
location: class ImageViewer
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
^
E:\Java\ImageViewer\ImageViewer.java:23: cannot resolve symbol
symbol : class JMenuBar
location: class ImageViewerFrame
JMenuBar menuBar=new JMenuBar();
^

[bhr]

import javax.swing.*; not java.swing.*;

[qiri07]

没有java.swing这个包，用 javax.swing。

[xiaofeng_cxy]

我已经解决！

[haode]

引入包的时候要确定。

像JB，JC这些工具会提示你有那些包可以引入的