The method setDefaultCloseOperation(int) is undefined for the type
public class MainFrame extends Frame implements ActionListener{this ....... 继承 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)io ........ class } List 在执行以上代码时this.setDefaultCloseOperat
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相关文章
- 1. jsp The method getDispatcherType() is undefined for the type HttpServletRequest
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