用java实现的记事本程序，能够实现下面功能 文件:新建,保存,另存为,退出 编辑:复制,粘贴,剪切, 格式:字体(有系统所有字体和大小),自动换行,,Java achieved with the Notepad program, to achieve the following features documents: New, Save, Save As from the Edit: Copy, paste, cut, format: Font (with all fonts and