scala02-2021.7.9-基础篇-this

今天有空继续研究了一下Scala，不多说上code

package chapter01

class student {
      var name =" ";
      var age =" ";
      val school ="辽宁林业职业技术学院";

   def `print` (name:String,age:String):Unit={
     println(name+" "+this.age+" "+this.school)
   }

}

　　

package chapter01

object HelloWorld {
  def main(args: Array[String]): Unit = {
//    println("hello world")
//    System.out.println("hello scala from java")
  val student = new student()
    student.`print`("何喵喵","18")

  }
}

　　这段代码会因为this.age  把age 指向class下定义的 age=“ ”；

解决方案：

package chapter01

object HelloWorld {
  def main(args: Array[String]): Unit = {
//    println("hello world")
//    System.out.println("hello scala from java")
  val student = new student()
    student.`print`("何喵喵","18")

  }
}

　　

package chapter01

class student {
      var name =" ";
      var age =" ";
      val school ="辽宁林业职业技术学院";

  def `this`(name:String,age:String):Unit={
    this.name=name
    this.age=age
  }
   def `print` (name:String,age:String):Unit={
     `this`(name,age)
     println(this.name+" "+this.age+" "+this.school)
   }

}

　　直接曲线救国

 

另附方法2：

 

package chapter01

class student (var name:String,var age:String){
      val school ="辽宁林业职业技术学院";

//  def `this`(name:String,age:String):Unit={
//    this.name=name
//    this.age=age
//  }
   def `print` ():Unit={
//     `this`(name,age)
     println(this.name+" "+this.age+" "+this.school)
   }

}

　　

package chapter01

object HelloWorld {
  def main(args: Array[String]): Unit = {
//    println("hello world")
//    System.out.println("hello scala from java")
  val student = new student("何喵喵","18")
    student.`print`()

  }
}

　　直接在类上解决