Java - 此行的多个标记 - java.io.ObjectInputStream

Question

我有一个测试课。

import javax.swing.JFrame;
public class TestWindow extends JFrame{



}

我使用eclipse。该类在第1行给出错误。 错误：

Multiple markers at this line
- The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from 
 required .class files
- The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from 
 required .class files

为什么我看到这个错误。通常它应该工作。我该如何解决这个错误？

Answer 1

您可以查看以下链接：The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

我想它会回答你的问题。