7/31/2019 So Snh Interface v Abstract Class trong java

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interface abstract class

interface - 1 interface c thextends t 1 haynhiu interface khc, cch nhau bi duphy .

- ko th implementst interface khc

- 1 interface ko thextends t 1 abstractclass

abstract class - 1 abstract class cth implementsnhiu interface.

- 1 abstract class cth extends t 1abstract khc

class - 1 class c thimplements 1 haynhiu interface.

- Nhiu class c thimplements cng 1interface.

- Khi 1 classimplements 1interface th class bt buc phi ci tht cc method ctrong interface

- 1 class ch c thextends t 1abstract class .

- Khi 1 class extends1 abstract class thclass c th cit ht hoc ch cit 1 vi method ctrong abstract class.

method - Cc method khaibo trong interfaceko c khai bophn thn .

- Cc method ko khaibo l abstractnhng c coi lcc method abstract.

- Cc method tronginterface ch ckhai bo l public.

- Cc method khaibo trong abstractclass c th nhngha phn thn ,hoc trng phnthn.

- Cc method trongabstract class c thc khai bo l :public , protected ,final.

- Nu trong abstractclass khai bomethod abstract thcc class extends tn phi ci tmethod abstract ny.

Variable