scala java混合

Scala | 特性混合 (Scala | Trait Mixins )

In Scala, the number of traits can be extended using a class or an abstract class. This is known as Trait Mixins. For extending, only traits, the blend of traits, class or abstract class are valid.
If the sequence of Trait Mixins is not maintained, an error is thrown by the compiler. It is used in composing a class. As multiple traits can be inherited.

在Scala中，可以使用类或抽象类扩展特征的数量。 这被称为特质混合 。 对于扩展，只有特征，特征，类或抽象类的混合才有效。
如果未保留“ 特性混合”的顺序，则编译器将引发错误。 它用于组成一个类。 由于可以继承多个特征。

Let's look at a few examples to understand the topic better,

让我们看一些例子，以更好地理解该主题，

Example 1: Extending abstract class with a trait

示例1：使用特征扩展抽象类

trait Bike {
def Bike() ;
}
abstract class Speed {
def Speed() ;
}
class myBike extends Speed with Bike {
def Bike() {
println("Harley Davidson Iron 883") ;
}
def Speed() {
println("Max Speed : 170 KmpH") ;
}
}
object myObject {
def main(args:Array[String]) {
val newbike = new myBike() ;
newbike.Bike() ;
newbike.Speed() ;
}
}

Output

输出量

Harley Davidson Iron 883
Max Speed : 170 KmpH

Example 2: Extending abstract class without a trait

示例2：扩展不带特征的抽象类

trait Bike {
def Bike() ;
}
abstract class Speed{
def Speed() ;
}
class myBike extends Speed {
def Bike() {
println("Harley Davidson Iron 883") ;
}
def Speed() {
println("Max Speed : 170 KmpH") ;
}
}
object myObject {
def main(args:Array[String]) {
val newbike = new myBike() with Bike;
newbike.Bike() ;
newbike.Speed() ;
}
}

Output

输出量

Harley Davidson Iron 883
Max Speed : 170 KmpH

翻译自: https://www.includehelp.com/scala/trait-mixins.aspx

scala java混合