简单的JavaBean 类 来说明 必要参数与可选参数，
参考来自 Glide，Fresco 等调用模式
public class SuperMan {
private String air;
private String food;
private String water;
private String car;
private String money;
private String work;
private SuperMan(Builder build) {
this.air = build.air;
this.food = build.food;
this.water = build.water;
this.car = build.car;
this.money = build.money;
this.work = build.work;
}
public static class Builder {
private String air;
private String food;
private String water;
private String car;
private String money;
private String work;
public Builder(String air, String food, String water) {
this.air = air;
this.food = food;
this.water = water;
}
public SuperMan build() {
return new SuperMan(this);
}
public Builder car(String car) {
return this;
}
public Builder money(String money) {
this.money = money;
return this;
}
public Builder work(String work) {
this.work = work;
return this;
}
}
public class Demo {
private void createSuperMan() {
SuperMan p = new SuperMan.Builder("氧气", "鸡腿", "矿泉水").car("BWM").build();
}
}
}
