object CollectionDemo7 {
def main(args: Array[String]): Unit = {
//数组使用
val arr = Array("red", "blue", "yellow")
arr(0) = "white"
for(el <- arr){println(el)}
//用Seq构建List
println(Seq("red", "blue", "yellow"))
//用IndexedSeq构建Vector
println(IndexedSeq("red", "blue", "yellow"))
//构建Stream lazy集合
def inc(i: Int): Stream[Int] = Stream.cons(i, inc(i+1))
val s = inc(1)
println(s)
println(s.take(10).toList)
println(s)
def addHead(i: Int): Stream[Int] = i #:: addHead(i+1)
val ss = addHead(1)
println(ss)
println(ss.take(10).toList)
println(ss)
}
}
运行结果：
whiteblueyellowList(red, blue, yellow)Vector(red, blue, yellow)Stream(1, ?)List(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)Stream(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ?)Stream(1, ?)List(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)Stream(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ?)
转载于:https://www.cnblogs.com/AK47Sonic/p/7087692.html
相关资源：JAVA上百实例源码以及开源项目
