我用eclipse创建了两个类,一个在ch12包中,另一个在ch12 的子包sub中。ch12中的类要用sub中的类创建对象。但是我并没有引入这个包,为什么可以运行阿?它是如何找到这个类的?
代码如下:
///////////////
package ch12.sub;
import java.io.*;
public class Alien implements Serializable{}
////////////////////
package ch12;
import java.io.*;public class FreezeAlien { /**
* @param args
*/
public static void main(String[] args) throws Exception{
// TODO Auto-generated method stub ObjectOutput out=new ObjectOutputStream(new FileOutputStream("X.file"));
Alien zorcon=new Alien();
out.writeObject(zorcon);
}}
代码如下:
///////////////
package ch12.sub;
import java.io.*;
public class Alien implements Serializable{}
////////////////////
package ch12;
import java.io.*;public class FreezeAlien { /**
* @param args
*/
public static void main(String[] args) throws Exception{
// TODO Auto-generated method stub ObjectOutput out=new ObjectOutputStream(new FileOutputStream("X.file"));
Alien zorcon=new Alien();
out.writeObject(zorcon);
}}
form.LoginForm.class
actiom / Login.java
object.DbUtil.class我在编译Login.java的时候调用了其它两个包,出现了下面的问题
小弟新学,望高手指点
C:\Tomcat 5.0\webapps\strutsweb\WEB-INF\classes\action>javac Login.java
Login.java:12: package form does not exist
import form.LoginForm;
^
Login.java:15: package object does not exist
import object.DbUtil;
^
Login.java:25: cannot resolve symbol
symbol : class LoginForm
location: class action.Login
LoginForm LoginForm=(LoginForm)form;
^
Login.java:25: cannot resolve symbol
symbol : class LoginForm
location: class action.Login
LoginForm LoginForm=(LoginForm)form;
^
Login.java:31: cannot resolve symbol
symbol : variable DbUtil
location: class action.Login
Connection conn=DbUtil.connectToDb();
^
Login.java:52: cannot resolve symbol
symbol : method findForword (java.lang.String)
location: class org.apache.struts.action.ActionMapping
return mapping.findForword("faile");
^
6 errors