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Trn c s cc lp th c 3 loi k tha trong Java, l single n, multilevel nhiu tng v hierarchical c cu trc. Trong lp trnh Java, a k tha multiple v k tha lai hybrid ch c h tr thng qua Interface. PFfd1TLnEQ/WKh8hrs_PdI/AAAAAAAABeA/THJ6O3DNSI8w8BxrefClr4jYQoQygVjtQCLcB/s1600/overloading-and-overriding.png' alt='Overloading And Overriding In Java Pdf File' title='Overloading And Overriding In Java Pdf File' />Chng ta s tm hiu v Interface trong chng sau. Ghi ch a k tha khng c h tr trong Java thng qua lp. Khi mt lp k tha t nhiu lp, th y l a k tha. Cu hi Ti sao a k tha khng c h tr trong Java thng qua lp Tr li gim tnh phc tp v lm n gin ha ngn ng, a k tha khng c h tr trong Java. Gi s c tnh hung c ba lp l A, B v C. Lp C k tha lp A v B. Nu cc lp A v B c cng phng thc v bn gi n t i tng lp con, th iu ny gy l tnh lng ngha l gi phng thc ca lp A hoc lp B. Bi v, compile time error th tt hn l runtime error, Java s thng bo mt compile time error nu bn k tha 2 lp. 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