Generics

src/senior/Generics/Apple.kt

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+package senior.Generics
+
+/**
+ * 水果数据类
+ *
+ */
+data class Apple(
+    var name: String,
+    var color: String
+)

src/senior/Generics/Box.kt

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+package senior.Generics
+
+/**
+ * 泛型
+ *
+ *
+ */
+class Box<T> {
+    var t: T? = null
+    fun get(): T? {
+        return t
+    }
+
+    fun set(t: T): Unit {
+         this.t = t
+    }
+}

src/senior/Generics/Main.kt

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+package senior.Generics
+
+/**
+ * Generics
+ *
+ */
+fun main(args: Array<String>) {
+    // 泛型
+    var list1 = arrayListOf<String>("aA","bB","cC")
+    println(list1)
+
+    var list2 = arrayListOf<Int>(12,34,56)
+    println(list2)
+
+    var list3 = arrayListOf<Long>(1L,3L,9L)
+    println(list3)
+
+    // 泛型类
+    var box = Box<Apple>()
+    box.set(Apple("红富士苹果","红色"))
+
+    var get = box.get()
+    println(get.toString())
+
+    var letters:CharRange = 'A'..'z'
+    var letters2: CharRange = 'A' until 'z'
+    println(letters2.toList())
+    println(letters.toList().slice(1..4))
+    println(letters.toList()[4])
+    println(letters is CharRange)
+}