重构-重新组织函数

Inline Method (内联函数)

Before

int getRating() {
return (moreThanFive()) ? 2: 1;
}
boolean moreThanFive() {
return NUMBER > 5;
}

After

int getRating() {
return NUMBER > 5 ? 2 : 1;
}

Inline Temp (内部临时变量)

Before

double basePrice = getBasePrice();
return (basePrice > 1000);

After

return getBasePrice() > 1000;

Replace Temp with Query (以查询取代临时变量)

Before

double getPrice(){
int basePrice = quantity * itemPrice;
double discountFactor;
if (basePrice > 1000) discountFactor = 0.95;
else discountFactor = 0.98
return basePrice * discountFactor;
}

After

double getPrice(){
return getBasePrice() * getDiscountFactor();
}

private int getBasePrice(){
return quantity * itemPrice;
}

private double getDiscountFactor () {
return getBasePrice() > 1000 ? 0.95 : 0.98;
}