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我想从教程(http://java.sun.com/developer/onlineTraining/rmi/RMI.html)上运行jguru的示例RMI,但它们没有在命令行中编译,所以我无法运行rmic并前进教程:jGuru RMI示例不编译
$javac Calculator.java
$javac CalculatorImpl.java
CalculatorImpl.java:6: cannot find symbol
symbol: class Calculator
implements Calculator {
^
1 error
两个类都完全一样,他们是在jguru教程: 接口:
public interface Calculator
extends java.rmi.Remote {
public long add(long a, long b)
throws java.rmi.RemoteException;
public long sub(long a, long b)
throws java.rmi.RemoteException;
public long mul(long a, long b)
throws java.rmi.RemoteException;
public long div(long a, long b)
throws java.rmi.RemoteException;
}
类:
public class CalculatorImpl
extends
java.rmi.server.UnicastRemoteObject
implements Calculator {
// Implementations must have an
//explicit constructor
// in order to declare the
//RemoteException exception
public CalculatorImpl()
throws java.rmi.RemoteException {
super();
}
public long add(long a, long b)
throws java.rmi.RemoteException {
return a + b;
}
public long sub(long a, long b)
throws java.rmi.RemoteException {
return a - b;
}
public long mul(long a, long b)
throws java.rmi.RemoteException {
return a * b;
}
public long div(long a, long b)
throws java.rmi.RemoteException {
return a/b;
}
}
环境瓦尔: (@Windows XP)
JAVA_HOME=C:\Program Files\Java\jdk1.6.0_20
CLASSPATH=C:\Program Files\Java\jdk1.6.0_20
Path=C:\Program Files\Java\jdk1.6.0_20\;...
好,我认为这是没有必要的,因为他们是在同一目录(属于到相同的包<默认包>) – AndreDurao 2010-09-09 18:03:50
所以我导入了“导入计算器;”并给我2个错误:CalculatorImpl.java:1:'。'预计 进口计算器; ^ CalculatorImpl.java:1:';'预计 进口计算器; ^ 2错误 – AndreDurao 2010-09-09 18:04:22
嗯,我以为你删除了'package'语句。你的代码在我的电脑上运行良好,没有'package'(和'import')。但是这两个java文件需要放在同一个文件夹中。 – 2010-09-09 18:16:13