eclipse 之中出现了 Resource leak: 'in' is never closed
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这是输入流出现的问题。解决方法是,如
Scanner in = new Scanner(System.in);
使用 在使用的后面 加上 in.close();
但事实上这会关闭,整个类的输入流;
建议,在一开始就在类中声明: private Scanner scan = new Scanner(System.in);
使用这样的变量在以后的过程中并不会,抛出异常;
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