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Java中Scanner类用法解析
2、 Scanner是一个用于接收输入的类,其成员方法nextDouble()可读取用户输入的双精度浮点数。通过将System.in作为参数传入Scanner的构造函数,使其关联键盘输入。使用new关键字在内存中创建该类的实例,从而使其他变量能够引用并操作这个对象,实现对输入数据的 ...
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