详解Kotlin中的面向对象（二）

class AttrDemo{ 
 private var attr1 : String = ""; 
 protected var attr2 : String = ""; 
 public var attr3 : String = ""; 
 
 var varattr : String = ""; 
 val valattr : String = ""; 
 
 var attr = 1; 
} 

private var attr1 : String 
get() = attr1.toString() 
set(value) { 
 attr1 = value 
} 
 
protected var attr2 : String 
get() { 
 //TODO GET 
 return attr2.toString() 
} 
set(value) { 
 attr2 = value 
} 

var attr4 : String = "" //一定要初始化 
private set 

interface mInterfaceDemo{ 
 fun function1() 
 fun function2(){ 
   
 } 
} 

class InterfaceDemoImpl : mInterfaceDemo{ 
 override fun function1() { 
  TODO("not implemented") //To change body of created functions use File | Settings | File Templates. 
 } 
 
} 

class GenericDemo<T>(t : T){ 
 var value = t 
} 

val generic: GenericDemo<Int> = GenericDemo<Int>(1) 

val generic = GenericDemo(1) 

class Outer { 
 private val bar: Int = 1 
 class Nested { 
  fun foo() = 2 
 } 
} 

class Outer { 
 private val bar: Int = 1 
 inner class Inner { 
  fun foo() = bar 
 } 
} 
 
val demo = Outer().Inner().foo() //==1 

mvp_button.setOnClickListener(object : View.OnClickListener{ 
 override fun onClick(v: View?) { 
  TODO("not implemented") //To change body of created functions use File | Settings | File Templates. 
 } 
}); 

mvp_button.setOnClickListener { 
 startActivity(Intent(MainActivity@this,MVPActivity::class.java)) 
} 

enum class Direction { 
 EAST,NORTH,SOUTH,WEST 
} 

enum class Color(val rgb: Int) { 
 RED(0xFF0000), 
 GREEN(0x00FF00), 
 BLUE(0x0000FF) 
} 

Direction.EAST 
Direction.valueOf("EAST"); 
Direction.values()