java排序写法学习之用Kotlin写一个list的排序
今天看了java排序的方法，自己用kotlin写了一个小的list的排序，代码如下。
1.首先定义一个内部类，用于比较list中两个数的大小
inner class User : Comparable{ var name: String = null var order: Int = null override fun compareTo(other: User): Int { return this.order!!.compareTo(other.order!!) } }
2.对list进行排序
val list = ArrayList() private fun dataOrder() { val user1:User = User() val user2:User = User() val user3:User = User() user1.name = "a" user1.order = 3 user2.name = "b" user2.order = 2 user3.name = "c" user3.order = 5 //此处add user2再add user1 user1.let { list.add(it) } user2.let { list.add(it) } user3.let { list.add(it) } Collections.sort(list) for (u in list) { Log.e("sds","paixusuanfa>>>>>>" + u.name) } }
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