list

src/senior/Collection/CollectionList.kt

@@ -10,21 +10,34 @@ fun main(args: Array<String>) {
     // 空集合
     var list: List<Int> = listOf()
     println(list)
+    println(list.isEmpty())
 
     // 包含一个元素0
     var zeroList: List<Int> = listOf(0)
     println(zeroList)
 
     // 包含多个元素
-    var multiList: List<Int> = listOf(1, 2, 4, 6, 7, 9)
+    var multiList: List<Int> = listOf(1, 2, 0, 4, 6, 7, 9)
     println(multiList)
     println("multiList元素大小:${multiList.size}")
+    println("multiList元素大小:${multiList.isEmpty()}")
+    // forEach
+    multiList?.forEach {
+        lt -> println(lt)
+    }
+
+    // for in
+    for (i in multiList) {
+        println(i)
+    }
 
     // 迭代器
     var iterator = multiList.iterator()
     while (iterator.hasNext()) {
         print(iterator.next().toString() + "\t")
     }
+    println("multiList中存在zeroList" + multiList.containsAll(zeroList))
+
     /**
      *
      */