概述

scala泛型结合隐式转换使用

实践

代码

package com.fun.scala/*** 视图界定*/
object Genericity04 {def main(args: Array[String]): Unit = {val s1 = new Stu("test", 33)val s2 = new Stu("test2", 32)println(new MaxValue2(s1, s2).compare)// 隐式转换与泛型结合implicit def stu2Ordered(stu: Stu2) = new Ordered[Stu2] {override def compare(that: Stu2): Int = stu.age - that.age}val s3 = new Stu2("test", 33)val s4 = new Stu2("test2", 34)println(new MaxValue2(s3, s4).compare)}// <% 视图界定 int2Integerclass MaxValue2[T <% Comparable[T]](a: T, b: T) {def compare = if (a.compareTo(b) > 0) a else b}// Ordered 使用的是 Comparableclass MaxValueOrdered[T <% Ordered[T]](a: T, b: T) {def compare = if (a.compareTo(b) > 0) a else b}}class Stu(val name: String, val age: Int) extends Ordered[Stu] {override def compare(that: Stu): Int = this.age - that.ageoverride def toString: String = this.name + "\t" + this.age
}class Stu2(val name: String, val age: Int) {override def toString: String = this.name + "\t" + this.age
}

执行

结束

scala泛型结合隐式转换使用 至此结束。