scala中抽象类和特质

Scala中的抽象类 (Abstract Class in Scala)

Abstract Class in Scala is created using the abstract keyword. Both abstract and non-abstract methods are included in an abstract class.

Scala中的Abstract类是使用abstract关键字创建的。 抽象类中包含抽象方法和非抽象方法。

Multiple inheritances are not supported by them.

它们不支持多重继承。

Syntax:

句法：

abstract class class_name{
   	def abstract_mathod	def general_method(){
   	}}

Example:

例：

abstract class bike {
    	def speed  	def display() 	{
   		println("This is my new Bike") ;	}} class ninja400 extends bike {
    	def speed() 	{
    		println("Top Speed is 178 Kmph"); 	} } object myObject {
    	def main(args: Array[String]) 	{
    		var obj = new ninja400(); 		obj.display() ;		obj.speed() ;	} }

Output

输出量

This is my new BikeTop Speed is 178 Kmph

Scala的特质 (Traits in Scala)

Traits in Scala are created using trait keyword. Traits contain both abstract and non-abstract methods and fields. These are similar to interfaces in java. They allow multiple inheritances also and they are more powerful as compared to their successors in java.

Scala中的特征是使用trait关键字创建的。 特性包含抽象和非抽象的方法和字段。 这些类似于Java中的接口。 它们还允许多重继承，并且与Java中的继承者相比，它们更强大。

Syntax:

句法：

trait trait_name{
   }

Example:

例：

trait bike {
    	def speed  	def display() 	{
    		println("This is my new Bike") ;	} } class ninja400 extends bike {
    	def speed() 	{
    		println("Top Speed is 178 Kmph"); 	} } object myObject {
    	def main(args: Array[String]) 	{
    		var obj = new ninja400(); 		obj.display() ;		obj.speed() ;	} }

Output

输出量

This is my new BikeTop Speed is 178 Kmph

抽象类和特征之间的区别 (Difference between abstract class and traits)

翻译自:

scala中抽象类和特质