Kotlin中两个对象的比较

data class Person(val name: String, val age: Int)

fun main() {
    val person1 = Person("Alice", 30)
    val person2 = Person("Alice", 30)
    val person3 = Person("Bob", 25)

    println(person1 == person2) // true，因为 data class 自动生成了 equals() 和 hashCode()
    println(person1 == person3) // false
}

data class Student(val name: String, val score: Int) : Comparable<Student> {
    override fun compareTo(other: Student): Int {
        return this.score.compareTo(other.score)
    }
}

fun main() {
    val students = listOf(
        Student("Alice", 85),
        Student("Bob", 92),
        Student("Charlie", 78)
    )

    val sortedStudents = students.sorted()
    println(sortedStudents) // 输出按分数排序的学生列表
}

class MyClass(val value: Int) {
    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (other == null || this::class != other::class) return false
        other as MyClass
        return value == other.value
    }

    override fun hashCode(): Int {
        return value.hashCode()
    }
}