比方說,我有以下POJO: public class Student {
private String firstName;
private String lastName;
public Student(){};
public Student(String firstName, String lastName) {
this.firstN
所以我試圖爲Scala實現Builder pattern的一個版本,我遇到了一些返回類型的問題。這裏是我的問題: abstract class Car() {
protected var fuelConsumption = 10.0
def setFuelConsumption(con: Double): Car = {
fuelConsumption = con