3 回答

TA貢獻(xiàn)1827條經(jīng)驗(yàn) 獲得超8個(gè)贊
我依靠 這具體上課來做我的工作
我依靠 任何類別那確實(shí)是 這東西做我的工作。

TA貢獻(xiàn)1864條經(jīng)驗(yàn) 獲得超2個(gè)贊
class Car implements IDrivable
基本例子:
interface IDrivable { void accelerate(); void brake(); }
class Car implements IDrivable { void accelerate() { System.out.println("Vroom"); } void brake() { System.out.println("Queeeeek");}}
class Bike implements IDrivable { void accelerate() { System.out.println("Rattle, Rattle, ..."); } void brake() { System.out.println("..."); }}
List<IDrivable> vehicleList = new ArrayList<IDrivable>();list.add(new Car());list.add(new Car());list.add(new Bike());list.add(new Car());list.add(new Bike());list.add(new Bike());
accelerate()
:
for(IDrivable vehicle: vehicleList) { vehicle.accelerate(); //this could be a bike or a car, or anything that implements IDrivable}

TA貢獻(xiàn)1821條經(jīng)驗(yàn) 獲得超5個(gè)贊
java.sql.Connection
Connection
Connection
java.util.Collection
size
, add
remove
public float calculateCoefficient(Collection collection) { return collection.size() * something / somethingElse;}
LinkedList
TreeSet
.
LinkedList
TreeSet
Collection
size()
Collection
LinkedList
TreeSet
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