scala （4） class类

[code]# 定义一个Persion类
class Persion(val firstName: String, val lastName: String) {
    # 成员属性
    private var _age = 0
    ＃成员属性的set方法
    def age = _age
    ＃ 注意这里到命名xx加‘_‘后必须接着函数体
    def age_=(newAge: Int) = _age = newAge

    def fullName() = firstName + " " + lastName
    # 重写
    override def toString() = fullName()
}

val obama: Persion = new Persion("Barack", "Obama")

# 调用
println("Persion: " + obama)
println("firstName: " + obama.firstName)
println("lastName: " + obama.lastName)
obama.age_=(51)
println("age: " + obama.age)