快学Scala 第十三课 （类型层级，对象相等性）

Scala 类型层级：

对象相等性：

和Java一样要重写equals方法和hashcode方法

class Student(val id: Int, val name: String) { override def equals(other: Any) = { val that = other.asInstanceOf[Student] if (that == null) false else id == that.id && name == that.name } override def hashCode = 13 * id.hashCode() + 17 * name.hashCode() } object TestCase { def main(args: Array[String]): Unit = { val s1 = new Student(1,"Sky") val s2 = new Student(1,"Sky") println(s1.equals(s2)) println(s1 == (s2)) } }

返回结果：

true

true

 

转载于:https://www.cnblogs.com/AK47Sonic/p/7352474.html

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