Question

我在Netbeans IDE 6.9中创建了一个项目在一个项目中，我有一个IBusinessLogic接口在第二个项目中，我创建了一个实现IBusinessLogic的BusinessLogic类在第三个项目中，我创建了一个BusienssLogic对象，并将此对象分配给IBusinessLogic的引用。写作时我没有收到任何错误我清理并构建第三个项目我得到以下例外：

incompatible types
found   : com.abc.businesslogic.BusinessLogic
required: com.abc.businesslogic.interfaces.IBusinessLogic
                com.abc.businesslogic.interfaces.IBusinessLogic logic = bl;
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
D:\ProjectsFeb12\Service\nbproject\build-impl.xml:531: The following error occurred while executing this line:
D:\ProjectsFeb12\Service\nbproject\build-impl.xml:261: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 3 seconds)

我知道我可以在超类型引用中分配子类型的对象，那么此异常必须是IDE。我怎么解决这个问题？我把所有代码都移到了一个新项目中，但没有用。

代码：

package com.abc.workerhandlers;

import com.abc.businesslogic.BusinessLogic;
import com.abc.businesslogic.interfaces.IBusinessLogic;

public class MQ2MQWorker1 {

    MQ2MQWorker1(){}

    public void init(){

                BusinessLogic bl = new BusinessLogic();
                IBusinessLogic logic = bl;  // This line is giving problem
    }
}

当我运行项目时，它执行得很完美，但项目的jar不会在dist目录中创建。

Answer 1

你确定类路径中有正确的类吗？顺便说一句，你不应该写

 BusinessLogic bl = new BusinessLogic();
IBusinessLogic logic = bl;  // This line is giving problem

，而只是IBUsinessLogic logic = new BusinessLogic();

netbeans中的清理和构建失败

1 个答案: