Java是否允许将getter作为方法参数传递？

Question

没有Lambda，谓词，接口。只是带有常规吸气剂的常规班。例如：

public int getWeight(){return weight;}

public int convertToLbs(int weight){some code here ...}


someObject.convertToLbs(someObject.getWeight())//valid???

谢谢

Answer 1

您当前的语法有效，但是您正在传递weight值，因为Java is pass-by-value。

要为返回int的内容传递方法引用，可以使用IntSupplier：

public int getWeight() { return weight; }
public int convertToLbs(IntSupplier s) { int w = s.getAsInt(); ... }

someObject.convertToLbs(someObject::getWeight);