Java implements multiple inheritance:

Java does not have multiple inheritance, C + +, but Java provides interface, extends, and implement, the effect of multiple inheritance is still possible:

1 /**2 * Created by Franklin Yang on 2015.10.23.3  */4 5 //6 InterfaceBase {7      Public voidmethod1 ();8 }9 Ten InterfaceAIextendsbase{ One      Public voidmethod2 (); A      Public voidmethod3 (); - //Public void Method4 (); - //Public void Method5 (); the } -  - InterfaceAIIextendsAI { - //Public void Method1 (); + //Public void Method2 (); - //Public void Method3 (); +      Public voidmethod4 (); A      Public voidmethod5 (); at } -  - classAbaseImplementsbase{ -      Public voidmethod1 () { -System.out.println ("Class abase implementation of interface base method 1"); -     } in } -  to classAbextendsAbaseImplementsai{ + //Public void Method1 () { - //System.out.println ("Class AB implements the interface Ai Method 1"); the //    } *      Public voidmethod2 () { $SYSTEM.OUT.PRINTLN ("Class AB implementation of interface Ai Method 2");Panax Notoginseng     } -      Public voidmethod3 () { theSYSTEM.OUT.PRINTLN ("Class AB implementation of interface Ai Method 3"); +     } A  the  + //Public void Method4 () {} - //Public void Method5 () {} $ } $  - classADextendsAbImplementsaii{ - //Public void Method1 () { the //System.out.println ("class ad Implements interface Ai Method 1"); - //    }Wuyi  the  - //Public void Method2 () {} Wu //Public void Method3 () {} -      Public voidmethod4 () { AboutSYSTEM.OUT.PRINTLN ("class ad Implements interface aII Method 4"); $     } -      Public voidMethod5 () { -SYSTEM.OUT.PRINTLN ("class ad Implements interface aII method 5"); -     } A } +  the //added by Whyang - classib{ $      Public voidDepend1 (Base b) { the b.method1 (); the     } the } the  -  in classaa{ the      Public voidDepend1 (AI i) { the i.method1 (); About     } the      Public voidDepend2 (AI i) { the i.method2 (); the     } +      Public voidDepend3 (AI i) { - i.method3 (); the     }Bayi } the  the classac{ -      Public voidDepend1 (AII i) { - i.method1 (); the     } the      Public voidDepend2 (AII i) { the i.method2 (); the     } -      Public voidDepend3 (AII i) { the i.method3 (); the     } the      Public voidDepend4 (AII i) {94 i.method4 (); the     } the      Public voidDepend5 (AII i) { the i.method5 ();98     } About } - 101 102  Public classisolate2{103      Public Static voidMain (string[] args) {104System.out.println ("11111111"); theIB base =NewIB ();106Base.depend1 (NewAB ());107 108System.out.println ("22222222");109AA A =NewAA (); theA.depend1 (NewAB ());111A.depend2 (NewAB ()); theA.depend3 (NewAB ());113  theSystem.out.println ("33333333"); theAC C =NewAC (); theC.depend1 (NewAD ());117C.depend2 (NewAD ());118C.depend3 (NewAD ());119C.depend4 (NewAD ()); -C.depend5 (NewAD ());121     }122}

Run a run:

The 11111111 class Abase implements the interface base method 122222222 class Abase implements the interface base method 1 class AB implements the interface Ai Method 2 class AB implements the interface Ai Method 333333333  0

Java implements multiple inheritance: