Java学习笔记（一）の考虑用静态工厂方法代替构造器 - JAVA

Service s2 = Services.newInstance("comp");
Service s3 = Services.newInstance("armed");
System.out.printf("%s, %s, %s%n", s1, s2, s3);
}

private static Provider DEFAULT_PROVIDER = new Provider() {
public Service newService() {
return new Service() {
@Override public String toString() {
return "Default service";
}
};
}
};

private static Provider COMP_PROVIDER = new Provider() {
public Service newService() {
return new Service() {

@Override public String toString() {
return "Complementary service";
}
};
}
};

private static Provider ARMED_PROVIDER = new Provider() {
public Service newService() {
return new Service() {
@Override public String toString() {
return "Armed service";
}
};
}
};
}

摘自 horsttnann的专栏

Java学习笔记（一）の考虑用静态工厂方法代替构造器 (二)