kotlin中既继承又实现

继承中的主要冲突 (Overriding Conflicts in Inheritance)

• It may appear, we inherit more than one implementation of the same method.

  看来，我们继承了同一方法的多个实现。

• Need to implement all the methods which we have inherited from multiple interfaces.

  需要实现我们从多个接口继承的所有方法。

解决Kotlin中继承中的主要冲突 (Resolving Overriding Conflicts in Inheritance in Kotlin)

package com.includehelp// declare interfaceinterface One{    // abstract function    fun myName()    // function with implementation    fun sayHello(){        println("Hello, 'From Interface One' ")    }}interface Two{    // function with implementation    fun sayHello(){        println("Hello, 'From Interface Two' ")    }    // function with implementation    fun myName(){        println("My Name is  Interface 'Two'")    }}// class implementing interfaceclass Three:One{    // override interface abstract method    override fun myName() {        println("My Name is Class Three")    }}// class implementing more then one interfacesclass Four:One,Two{    // need to implement all the methods     // which we have inherited from multiple interfaces    override fun sayHello() {        // Both interface have sayHello implementation in interfaces,        // so explicitly define Interface name in super to call,         // specific implementation from class        super
    
     .sayHello()        super
     
      .sayHello()        println("Hello, From Class 'Four' ")    }    // need to implement all the methods     // which we have inherited from multiple interfaces    override fun myName() {        // called super type implementation of method,        // only interface two have implementation of this method,         // so need to explicitly define interface name        super.myName()        println("My Name is Class Four")    }}// Main function, Entry point of programfun main(){    // create class instance    val four = Four()    // call methods    four.myName()    // call methods    four.sayHello()}
     
    

Output:

输出：

My Name is  Interface 'Two'My Name is Class FourHello, 'From Interface One' Hello, 'From Interface Two' Hello, From Class 'Four'

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kotlin中既继承又实现