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[1.理解异常的概念](%E7%90%86%E8%A7%A3%E5%BC%82%E5%B8%B8%E7%9A%84%E6%A6%82%E5%BF%B5.md) [2.掌握异常的分类和Java常见的异常](%E6%8E%8C%E6%8F%A1%E5%BC%82%E5%B8%B8%E7%9A%84%E5%88%86%E7%B1%BB%E5%92%8CJava%E5%B8%B8%E8%A7%81%E7%9A%84%E5%BC%82%E5%B8%B8.md) [3.理解掌握Java的异常处理机制](%E7%90%86%E8%A7%A3%E6%8E%8C%E6%8F%A1Java%E7%9A%84%E5%BC%82%E5%B8%B8%E5%A4%84%E7%90%86%E6%9C%BA%E5%88%B6.md) [4.掌握自定义异常](%E6%8E%8C%E6%8F%A1%E8%87%AA%E5%AE%9A%E4%B9%89%E5%BC%82%E5%B8%B8.md) [5.理解文件系统和File类](%E7%90%86%E8%A7%A3%E6%96%87%E4%BB%B6%E7%B3%BB%E7%BB%9F%E5%92%8CFile%E7%B1%BB.md) [6.理解I/O概念和分类](%E7%90%86%E8%A7%A3I/O%E6%A6%82%E5%BF%B5%E5%92%8C%E5%88%86%E7%B1%BB.md) [7.掌握常见的I/O流对象](%E6%8E%8C%E6%8F%A1%E5%B8%B8%E8%A7%81%E7%9A%84I/O%E6%B5%81%E5%AF%B9%E8%B1%A1.md) [8.掌握文件流与缓冲流](%E6%8E%8C%E6%8F%A1%E6%96%87%E4%BB%B6%E6%B5%81%E4%B8%8E%E7%BC%93%E5%86%B2%E6%B5%81%5D.md)