Just two methods need to have their visibility changed to public: void main and void connect (Connection con).

只有两个方法的可见性需要改为public： void main和void connect (Connection con)。

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In line 13 of Listing 1, the connection object (con) is established as the "default" connection.

在清单1的第13行上，Connection对象(con)被建立为“默认”连接。

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