java报错The method get_discount() is undefined for the type该如何处理？

1.例子如下图所示：

2. 增加代码

private static double get_discount() {
// TODO Auto-generated method stub
return 0.7;//return后面就是折扣率，可以随意更改
}

3.重新运行结果如下：

希望对你有所帮助~

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java报错The method get_discount() is undefined for the type该如何处理？

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