The method setDefaultCloseOperation(int) is undefined for the type
public class MainFrame extends Frame implements ActionListener{this ....... 繼承 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)io ........ class } List 在執行以上代碼時this.setDefaultCloseOperat
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相關文章
- 1. jsp The method getDispatcherType() is undefined for the type HttpServletRequest
- 2. The method getTextContent() is undefined for the type Node
- 3. The method setConfig(RequestConfig) is undefined for the type HttpGet
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- 5. spring boot 常見問題 - 02. The method builder() is undefined for the type Result
- 6. MyEclipse 下 the method setTextContent() is undefined for the type Element錯誤
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- 8. 編譯時The method is undefined for the type 報錯
- 9. The method getTextContent() is undefined ?
- 10. The method getTextContent()is undefined for...編譯出錯