一天一段scala代码（五）

package examples



class Person
{
  val publicVal = 1 //自动生成getter
  var publicVar = 2 //自动生成getter和setter
  
  //自定义getter和setter
  private var privateAge=0
  def age = privateAge //getter
  def age_=(newValue:Int) //setter
  {
    if(newValue>privateAge) privateAge = newValue
  }

}

/*
 * 主构造器
 */
class Person1(name:String,age:Int) //这样name和age都默认是val
{
  def info=println("name:"+name+",age:"+age)
}

class Person11(val name:String,private var age:Int) 
{
  def info=println("name:"+name+",age:"+age)
}


/*
 * 辅助构造器
 */
class Person2()
{
  private var name=""
  private var age=0
  
  def this(name:String)=
  {
    this()//调用默认主构造器
    this.name=name
  }
  
  def this(name:String,age:Int)
  {
    this(name)//调用另一个构造器
    this.age=age
  }

}



object Example5 {
  def main(args: Array[String]) 
  {
    val person = new Person
    person.age=1//调用age的setter方法
    println(person.publicVal)//调用getter方法
    
    val person1 =new Person1("linger",24)//调用主构造器
    person1.info
    
    val person2 = new Person2("linger")//调用辅助构造器
    new Person2//调用默认的无参主构造器
  }
}

1
name:linger,age:24