我是一个初学者。在看一本JAVA2的电子书。
这是书上的一个例子。
我用的是JCREATE
出现的错误提示是:
--------------------Configuration: <Default>--------------------
D:\ImageFilterDemo.java:15: cannot resolve symbol
symbol : class PlugInFilter
location: class ImageFilterDemo
PlugInFilter pif;
^
D:\ImageFilterDemo.java:18: cannot resolve symbol
symbol : class LoadedImage
location: class ImageFilterDemo
LoadedImage lim;
^
D:\ImageFilterDemo.java:40: cannot resolve symbol
symbol : class loadedImage
location: class ImageFilterDemo
lim = new loadedImage(img);
^
D:\ImageFilterDemo.java:52: cannot resolve symbol
symbol : class PlugInFilter
location: class ImageFilterDemo
pif = (PlugInFilter) Class.forName(a).newInstance();
^
4 errors请大家看看,有劳了。
这是书上的一个例子。
我用的是JCREATE
出现的错误提示是:
--------------------Configuration: <Default>--------------------
D:\ImageFilterDemo.java:15: cannot resolve symbol
symbol : class PlugInFilter
location: class ImageFilterDemo
PlugInFilter pif;
^
D:\ImageFilterDemo.java:18: cannot resolve symbol
symbol : class LoadedImage
location: class ImageFilterDemo
LoadedImage lim;
^
D:\ImageFilterDemo.java:40: cannot resolve symbol
symbol : class loadedImage
location: class ImageFilterDemo
lim = new loadedImage(img);
^
D:\ImageFilterDemo.java:52: cannot resolve symbol
symbol : class PlugInFilter
location: class ImageFilterDemo
pif = (PlugInFilter) Class.forName(a).newInstance();
^
4 errors请大家看看,有劳了。
LoadedImage
这两个关键字不能被认别。
import java.awt.*;
import java.awt.event.*;
import java.util.*;这个类有以上四组import,但是没有一组import了PlugInFilter 这个类,PlugInFilter 这个类应该是自己定义的类,不是jdk的标准类库中的类,所以,编译的时候由于找不到PlugInFilter ,报错,从书上找到PlugInFilter ,先搞定PlugInFilter 这个类,编译通过,再搞你现在的这个类,记住要先引入PlugInFilter !