你有一個(gè)字面數(shù)值(literal number),帶有特殊含義.
創(chuàng)造一個(gè)常量,根據(jù)其意義為它命名,并將上述的字面數(shù)值替換為這個(gè)常量.
double potentialEnergy(double mass, double height) {
return mass * 9.81 * height;
}
double potentialEnergy(double mass, double height) {
return mass * GRAVITATIONAL_CONSTANT * height;
}
static final double GRAVITATIONAL_CONSTANT = 9.81;