diff --git a/src/senior/Lambda/Collection.kt b/src/senior/Lambda/Collection.kt
new file mode 100644
index 0000000..76d80e4
--- /dev/null
+++ b/src/senior/Lambda/Collection.kt
@@ -0,0 +1,33 @@
+package senior.Lambda
+
+/**
+ * 集合
+ *
+ */
+
+fun main(args: Array<String>) {
+    val list = listOf(20, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 33, 12, 74, 23, 21)
+    println("list = $list")
+
+    // 查找
+    println("list = $list")
+    // 只会返回查找到的第一个元素
+    println("element > 2 = ${list.find { it > 2 }}")
+
+    // 查找满足条件的第一个元素 未找到会抛异常
+    println("element > 2 = ${list.first { it > 2 }}")
+
+    // 查找满足条件的最后一个元素 未找到会抛异常
+    println("element < 33 = ${list.last { it < 33 }}")
+
+    // 查找到的结果超过1个将会异常
+    println("element single one = ${list.single { it == 9 }}")
+
+    // takewile只有第一个元素满足条件才能继续向下查找
+    println("element > 10 = ${list.takeWhile { it > 2 }}")
+    println("element > 10 = ${list.takeWhile { it > 20 }}")
+
+    // 查找所有满足条件的元素
+    println("element > 10 = ${list.filter { it >= 20 }}")
+
+}
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