scala学习

• 入门

  /**
    * Object: 关键字。声明一个单例对象（伴生对象）
    *
    */
  object HelloWorld {
    /**
      * def 方法名称(参数名称: 参数类型): 返回值类型={方法体}
      * @param args
      */
    def main(args: Array[String]): Unit = {
      println("Hello World")
      System.out.println("Hello Scala")
    }
  }
  

  　　

  class Student(name: String, id: Int) {
    def printInfo(): Unit = {
      println(name + "," + id + "," + Student.school)
    }
  
  }
  
  // 引入伴生对象
  object Student {
    val school: String = "beida"
  
    def main(args: Array[String]): Unit = {
      val zhangsan = new Student("zhangsan", 11)
      val lisi = new Student("lisi", 22)
      zhangsan.printInfo()
      lisi.printInfo()
    }
  }
  

  　　

   

   

scala学习

原文：https://www.cnblogs.com/codehero/p/14590447.html