diff --git a/src/class/AbstractClass/Cat.kt b/src/class/AbstractClass/Cat.kt
index e7112be..2955c6f 100644
--- a/src/class/AbstractClass/Cat.kt
+++ b/src/class/AbstractClass/Cat.kt
@@ -1,11 +1,12 @@
 package `class`.AbstractClass
 
-class Cat: Animal() {
+class Cat(color: String): Animal() {
+    private var color = color
     override fun getName(name: String) {
-        println("name = $name")
+        println("color = $color,name = $name")
     }
 }
 
 fun main(args: Array<String>) {
-    Cat().getName("猫")
+    Cat("红色").getName("猫")
 }
\ No newline at end of file
diff --git a/src/class/Interface/Animal.kt b/src/class/Interface/Animal.kt
new file mode 100644
index 0000000..dd35f56
--- /dev/null
+++ b/src/class/Interface/Animal.kt
@@ -0,0 +1,12 @@
+package `class`.Interface
+
+/**
+ * 接口
+ */
+interface Animal {
+    fun setColor(color: String)
+
+    fun setName(name: String)
+
+    fun say()
+}
\ No newline at end of file
diff --git a/src/class/Interface/Cat.kt b/src/class/Interface/Cat.kt
new file mode 100644
index 0000000..5d1b9c4
--- /dev/null
+++ b/src/class/Interface/Cat.kt
@@ -0,0 +1,25 @@
+package `class`.Interface
+
+class Cat : Animal {
+    private var color: String? = null
+    private var name: String? = null
+
+    override fun setColor(color: String) {
+        this.color = color
+    }
+
+    override fun setName(name: String) {
+        this.name = name
+    }
+
+    override fun say() {
+        println("name = ${this.name}, color = ${this.color}")
+    }
+}
+
+fun main(args: Array<String>) {
+    var cat = Cat()
+    cat.setName("猫")
+    cat.setColor("橘色")
+    cat.say()
+}
\ No newline at end of file